2021 Ram 2500 Electrical Connector Parts: OEM & Replacement (119 Parts)

The 2021 Ram 2500 has 119 electrical connector parts with verified fitment on this page — 50 part types and 11 brands, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each part includes a manufacturer part number and application notes.

On the 2021 Ram 2500, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules. Most of the listed parts are Trailer Connector (15 parts), Headlamp Wiring Harness / Connector (10 parts) and Transmission-Automatic Wiring Harness / Connector (10 parts). The other 47 part types cover the remaining 84 parts.

A/C Compressor Clutch Coil Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2052	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalGauge: 18-14 Gauge Fitment notes — STANDARD MOTOR PRODUCTS S2052 Connector Shape: OvalGauge: 18-14 GaugeHarness LengthCM: 50Inches: 20	View on Amazon

This table covers the harness connectors at the A/C Compressor Clutch Coil. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

A/C Refrigerant Pressure Switch Connector

Brand	Part Number	Markets	Notes	Buy
HOLSTEIN Fits: all 2021 2500 engines	2HAR0060	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2316	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalNumber of Splice Connectors Included: 3	View on Amazon

This table covers the harness connectors at the A/C Refrigerant Pressure Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

A/C Refrigerant Temperature Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2478	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the A/C Refrigerant Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

ABS Wheel Speed Sensor Connector

Brand	Part Number	Markets	Notes	Buy
ACDELCO Fits: all 2021 2500 engines	PT2160	🇺🇸 US 🇨🇦 CA	GoldShape: Square Fitment notes — ACDELCO PT2160 GoldShape: Square Rear Left	View on Amazon
HOLSTEIN Fits: all 2021 2500 engines	2HAR0035	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Includes ABS Wheel Speed Sensor Wire Harness Fitment notes — HOLSTEIN 2HAR0035 Includes ABS Wheel Speed Sensor Wire Harness Rear Left	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	HP3945	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	HandypackConnector Shape: Square Fitment notes — STANDARD MOTOR PRODUCTS HP3945 HandypackConnector Shape: SquareIncludes Wheel Speed Sensor Wiring HarnessBlackIncludes ABS Wheel Speed Sensor Wire Harness Rear Left	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S824	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: SquareHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S824 Connector Shape: SquareHarness LengthIncludes ABS Wheel Speed Sensor Wire HarnessIncludes Wheel Speed Sensor Wiring Harnessinches: 7Length (In): 1.25Wiring Harness Length (mm): 209.55Black Rear Left	View on Amazon

This table covers the harness connectors at each ABS wheel-speed sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Accelerator Pedal Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S1478	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: Rectangle	View on Amazon

This table covers the harness connectors at the Accelerator Pedal Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Alternator / Generator Connector

Brand	Part Number	Markets	Notes	Buy
HOLSTEIN Fits: 6.4L V8	2HAR0035	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Includes ABS Wheel Speed Sensor Wire Harness Fitment notes — HOLSTEIN 2HAR0035 Includes ABS Wheel Speed Sensor Wire Harness Upper Unit	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2895	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Upper Unit	View on Amazon
WELLS Fits: all 2021 2500 engines	1P1877	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Wiring Harness Length: 18.75 In	View on Amazon

This table covers the harness connectors at the Alternator / Generator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Ambient Air Temperature Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S3250	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Ambient Air Temperature Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Body Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: all 2021 2500 engines	68387005AC	🇺🇸 US 🇨🇦 CA	Fits Box or Rambox Cargo Management System, Locking TailgateMega Cabor Box or Rambox Cargo Management System, Locking Tailgate Fitment notes — MOPAR 68387005AC Fits: Box or Rambox Cargo Management System, Locking TailgateMega Cabor Box or Rambox Cargo Management System, Locking TailgateRegular Cab8 Foot Bedor Box or Rambox Cargo Management System, Locking TailgateCrew Cab Wheelbase 2or Box or Rambox Cargo Management System, Locking TailgateCrew Cab Crew Cab8' Box	View on Amazon
MOPAR Popular Fits: all 2021 2500 engines	68399008AD	🇺🇸 US 🇨🇦 CA	Camera Fitment notes — MOPAR 68399008AD Camera Fits: Parkview Rear Back-up Camera, Delete BoxCrew Cab Crew Cab8' Boxor Parkview Rear Back-up Camera, Delete BoxCrew Cab Wheelbase 2or Parkview Rear Back-up Camera, Delete BoxMega Cabor Parkview Rear Back-up Camera, Delete BoxRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: all 2021 2500 engines	52112344AD	🇺🇸 US 🇨🇦 CA	Frame to DashFront Axle Disconnect Fitment notes — MOPAR 52112344AD Frame to DashFront Axle Disconnect Fits: FrontUp To 08/19/2021Mega Cab or: FrontUp To 08/19/2021Regular Cab8 Foot Bed or: FrontUp To 08/19/2021Crew Cab Crew Cab8' Box or: FrontUp To 08/19/2021Crew Cab Wheelbase 2	View on Amazon
MOPAR Fits: all 2021 2500 engines	52112345AC	🇺🇸 US 🇨🇦 CA	Frame To Dash Fitment notes — MOPAR 52112345AC Frame To Dash Fits: Regular Cab8 Foot Bedor Crew Cab8' Boxor Crew Cab Wheelbase 2	View on Amazon
MOPAR Fits: all 2021 2500 engines	52112345AD	🇺🇸 US 🇨🇦 CA	Frame to DashFront Axle Disconnect Fitment notes — MOPAR 52112345AD Frame to DashFront Axle Disconnect Fits: FrontRegular Cab8 Foot Bed or: FrontCrew Cab8' Box or: FrontCrew Cab Wheelbase 2	View on Amazon
MOPAR Fits: all 2021 2500 engines	68396011AB	🇺🇸 US 🇨🇦 CA	Tail Lamp Fitment notes — MOPAR 68396011AB Tail Lamp Fits: Box or Rambox Cargo Management System, Incandescent TaillampsExcept European TaillampsCrew Cab Wheelbase 2or Box or Rambox Cargo Management System, Incandescent TaillampsExcept European TaillampsCrew Cab Crew Cab8' Boxor Box or Rambox Cargo Management System, Incandescent TaillampsExcept European TaillampsMega Cabor Box or Rambox Cargo Management System, Incandescent TaillampsExcept European TaillampsRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: all 2021 2500 engines	68396013AB	🇺🇸 US 🇨🇦 CA	Tail Lamp Fitment notes — MOPAR 68396013AB Tail Lamp Fits: Box or Rambox Cargo Management System, Blind Spot and Cross Path DetectionExcept European TaillampsCrew Cab Wheelbase 2or Box or Rambox Cargo Management System, Blind Spot and Cross Path DetectionExcept European TaillampsCrew Cab Crew Cab8' Boxor Box or Rambox Cargo Management System, Blind Spot and Cross Path DetectionExcept European TaillampsMega Cabor Box or Rambox Cargo Management System, Blind Spot and Cross Path DetectionExcept European TaillampsRegular Cab8 Foot Bed	View on Amazon

This table covers the body-harness connectors and pigtails. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Camshaft Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2278	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	BlackConnector Shape: Oval	View on Amazon

This table covers the harness connectors at the Camshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Controller Area Network (CAN) Bus Connector

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 2500 engines	601309	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	13-Way Green	View on Amazon
DORMAN Fits: all 2021 2500 engines	601308	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	20-Way Green	View on Amazon

This table covers the harness connectors at the Controller Area Network (CAN) Bus. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Crankshaft Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2916	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Crankshaft Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Cylinder Deactivation Solenoid Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2442	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Only Connector	View on Amazon
WELLS Fits: 6.4L V8	1P2227	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Cylinder Deactivation Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Diesel Exhaust Fluid (DEF) Pump Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 2500 engines	68330357AB	🇺🇸 US 🇨🇦 CA	Urea Tank Harness Fitment notes — MOPAR 68330357AB Urea Tank Harness Fits: Selective Catalytic Reduction (UREA)Regular Cab8 Foot Bedor Selective Catalytic Reduction (UREA)Mega Cabor Selective Catalytic Reduction (Urea)Crew Cab Crew Cab8' Boxor Selective Catalytic Reduction (Urea)Crew Cab Wheelbase 2	View on Amazon

This table covers the wiring-harness connectors at the Diesel Exhaust Fluid (DEF) Pump. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Differential Pressure Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S1410	🇺🇸 US 🇨🇦 CA	Connector Shape: OvalWiring Harness Length (mm): 508	View on Amazon

This table covers the harness connectors at the Differential Pressure Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Door Lock Actuator Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2894	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front and Rear Door	View on Amazon

This table covers the harness connectors at the Door Lock Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Door Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 2500 engines	68365982AD	🇺🇸 US 🇨🇦 CA	Rear Door Wiring Fitment notes — MOPAR 68365982AD Rear Door Wiring Fits: RightSpeed Sensitive Power Locks, Rear Door Accent LightingCrew Cab Wheelbase 2 or: RightSpeed Sensitive Power Locks, Rear Door Accent LightingMega Cab or: RightSpeed Sensitive Power Locks, Rear Door Accent LightingCrew Cab Crew Cab8' Box	View on Amazon
MOPAR Fits: all 2021 2500 engines	68365983AD	🇺🇸 US 🇨🇦 CA	Rear Door Wiring Fitment notes — MOPAR 68365983AD Rear Door Wiring Fits: LeftSpeed Sensitive Power Locks, Rear Door Accent LightingCrew Cab Wheelbase 2 or: LeftSpeed Sensitive Power Locks, Rear Door Accent LightingMega Cab or: LeftSpeed Sensitive Power Locks, Rear Door Accent LightingCrew Cab Crew Cab8' Box	View on Amazon
MOPAR Fits: all 2021 2500 engines	68365984AD	🇺🇸 US 🇨🇦 CA	Rear Door Wiring Fitment notes — MOPAR 68365984AD Rear Door Wiring Fits: RightSpeed Sensitive Power LocksExc. Rear Door Accent LightingCrew Cab Wheelbase 2 or: RightSpeed Sensitive Power LocksExc. Rear Door Accent LightingMega Cab or: RightSpeed Sensitive Power LocksExc. Rear Door Accent LightingCrew Cab Crew Cab8' Box	View on Amazon
MOPAR Fits: all 2021 2500 engines	68365985AD	🇺🇸 US 🇨🇦 CA	Rear Door Wiring Fitment notes — MOPAR 68365985AD Rear Door Wiring Fits: LeftSpeed Sensitive Power LocksExc. Rear Door Accent LightingCrew Cab Wheelbase 2 or: LeftSpeed Sensitive Power LocksExc. Rear Door Accent LightingMega Cab or: LeftSpeed Sensitive Power LocksExc. Rear Door Accent LightingCrew Cab Crew Cab8' Box	View on Amazon

This table covers the wiring-harness connectors at the Door. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

EGR Valve Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2498	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the EGR Valve. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Engine Block Heater Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: 6.4L V8	68409909AB	🇺🇸 US 🇨🇦 CA	Fits Engine Block HeaterRegular Cab Fitment notes — MOPAR 68409909AB Fits: Engine Block HeaterRegular Cab8 Foot Bedor Engine Block HeaterMega Cabor Engine Block HeaterCrew Cab Crew Cab8' Boxor Engine Block HeaterCrew Cab Wheelbase 2	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68409910AB	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineEngine Block Heater Fitment notes — MOPAR 68409910AB Fits: Cummins EngineEngine Block HeaterCrew Cab Wheelbase 2or Cummins EngineEngine Block HeaterCrew Cab8' Boxor Cummins EngineEngine Block HeaterMega Cabor Cummins EngineEngine Block HeaterRegular Cab8 Foot Bed	View on Amazon

This table covers the harness connectors at the Engine Block Heater. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Engine Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68533291AB	🇺🇸 US 🇨🇦 CA	Fits Cummins Engine50 State Emissions Fitment notes — MOPAR 68533291AB Fits: Cummins Engine50 State EmissionsMega Cab6 Speed Automatic 68RFE Transmission or: Cummins Engine50 State EmissionsCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission or: Cummins Engine50 State EmissionsCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins Engine50 State EmissionsRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Euro Stage 3 Emission VehicleCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Euro Stage 3 Emission VehicleCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Euro Stage 3 Emission VehicleMega Cab6 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Euro Stage 5 Emissions with EOBD 5Crew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Euro Stage 5 Emissions with EOBD 5Crew Cab Wheelbase 26 Speed Automati	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68533292AB	🇺🇸 US 🇨🇦 CA	Fits Cummins engineExport Emissions, Underground Calibration Fitment notes — MOPAR 68533292AB Fits: Cummins engineExport Emissions, Underground CalibrationCrew Cab8' Box6 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Underground CalibrationRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Underground CalibrationCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineExport Emissions, Underground CalibrationMega Cab6 Speed Automatic 68RFE Transmission	View on Amazon

This table covers the wiring-harness connectors at the Engine. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Exhaust Gas Temperature (EGT) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S3159	🇺🇸 US 🇨🇦 CA	Located on EGR Crossover Tube	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S3157	🇺🇸 US 🇨🇦 CA	Located Before Particulate Filter	View on Amazon

This table covers the harness connectors at the Exhaust Gas Temperature (EGT) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Fuel Injector Connector

Brand	Part Number	Markets	Notes	Buy
SKP Fits: all 2021 2500 engines	SKS824	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Includes ABS Wheel Speed Sensor Wire Harness Fitment notes — SKP SKS824 Includes ABS Wheel Speed Sensor Wire Harness Rear Left	View on Amazon
WELLS Fits: 6.4L V8	1P2047	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Wiring Harness Length: 20.22 In	View on Amazon

This table covers the harness connectors at the Fuel Injector. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Fuel Sending Unit Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S1410	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalWiring Harness Length (mm): 508	View on Amazon

This table covers the harness connectors at the Fuel Sending Unit. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Grille Air Intake / Shutter Actuator Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S2511	🇺🇸 US 🇨🇦 CA	Connector Shape: Oval	View on Amazon

This table covers the harness connectors at the Grille Air Intake / Shutter Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Headlamp Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: 6.4L V8	52112313AE	🇺🇸 US 🇨🇦 CA	Fits LED Reflector Headlamps, TRU-LOK Front & Rear AxlesExc. Surround View Camera System or Remote Start System Fitment notes — MOPAR 52112313AE Fits: LED Reflector Headlamps, TRU-LOK Front & Rear AxlesExc. Surround View Camera System or Remote Start SystemCrew Cab Crew Cab8' Boxor LED Reflector Headlamps, TRU-LOK Front & Rear AxlesExc. Surround View Camera System or Remote Start SystemCrew Cab Wheelbase 2or LED Reflector Headlamps, TRU-LOK Front & Rear AxlesExc. Surround View Camera System or Remote Start SystemMega Cabor LED Reflector Headlamps, TRU-LOK Front & Rear AxlesExc. Surround View Camera System or Remote Start SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.4L V8	52112314AE	🇺🇸 US 🇨🇦 CA	Fits BI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera System Fitment notes — MOPAR 52112314AE Fits: BI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemCrew Cab Crew Cab8' Boxor BI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemCrew Cab Wheelbase 2or BI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemMega Cabor BI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.4L V8	52112318AE	🇺🇸 US 🇨🇦 CA	Fits BI-Function LED Projector Headlamps or Halogen ECE Headlamps, Remote Start SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera System Fitment notes — MOPAR 52112318AE Fits: BI-Function LED Projector Headlamps or Halogen ECE Headlamps, Remote Start SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemCrew Cab Crew Cab8' Boxor BI-Function LED Projector Headlamps or Halogen ECE Headlamps, Remote Start SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemCrew Cab Wheelbase 2or BI-Function LED Projector Headlamps or Halogen ECE Headlamps, Remote Start SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemMega Cabor BI-Function LED Projector Headlamps or Halogen ECE Headlamps, Remote Start SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.4L V8	52112322AE	🇺🇸 US 🇨🇦 CA	Fits Halogen Quad Headlamps or LED Reflector Headlamps, Remote Start System, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera System Fitment notes — MOPAR 52112322AE Fits: Halogen Quad Headlamps or LED Reflector Headlamps, Remote Start System, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemCrew Cab Crew Cab8' Boxor Halogen Quad Headlamps or LED Reflector Headlamps, Remote Start System, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemCrew Cab Wheelbase 2or Halogen Quad Headlamps or LED Reflector Headlamps, Remote Start System, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemMega Cabor Halogen Quad Headlamps or LED Reflector Headlamps, Remote Start System, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.4L V8	52112324AE	🇺🇸 US 🇨🇦 CA	Fits Halogen Quad Headlamps or LED Reflector Headlamps, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera System Fitment notes — MOPAR 52112324AE Fits: Halogen Quad Headlamps or LED Reflector Headlamps, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemCrew Cab Crew Cab8' Boxor Halogen Quad Headlamps or LED Reflector Headlamps, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemCrew Cab Wheelbase 2or Halogen Quad Headlamps or LED Reflector Headlamps, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemMega Cabor Halogen Quad Headlamps or LED Reflector Headlamps, Active Noise Control SystemExc. TRU-LOK Front & Rear Axles or Remote Start System or Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	52112319AE	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE Headlamps Fitment notes — MOPAR 52112319AE Fits: Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. Surround View Camera SystemCrew Cab Crew Cab8' Boxor Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. Surround View Camera SystemCrew Cab Wheelbase 2or Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. Surround View Camera SystemMega Cabor Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE HeadlampsExc. Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	52112323AE	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineHalogen Quad Headlamps or LED Reflector Headlamps Fitment notes — MOPAR 52112323AE Fits: Cummins EngineHalogen Quad Headlamps or LED Reflector HeadlampsExc. Surround View Camera SystemCrew Cab Crew Cab8' Boxor Cummins EngineHalogen Quad Headlamps or LED Reflector HeadlampsExc. Surround View Camera SystemCrew Cab Wheelbase 2or Cummins EngineHalogen Quad Headlamps or LED Reflector HeadlampsExc. Surround View Camera SystemMega Cabor Cummins EngineHalogen Quad Headlamps or LED Reflector HeadlampsExc. Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68377333AD	🇺🇸 US 🇨🇦 CA	Fascia Wiring Fitment notes — MOPAR 68377333AD Fascia Wiring Fits: Bright Front Bumper, Tow Hooks or Chrome Tow HooksExc. Parksense Front/Rear Park Assist SystemRegular Cab8 Foot Bedor Bright Front Bumper, Tow Hooks or Chrome Tow HooksExc. Parksense Front/Rear Park Assist SystemCrew Cab Wheelbase 2or Bright Front Bumper, Tow Hooks or Chrome Tow HooksExc. Parksense Front/Rear Park Assist SystemCrew Cab8 Foot Bedor Bright Front Bumper, Tow Hooks or Chrome Tow HooksExc. Parksense Front/Rear Park Assist SystemMega Cabor Bright Front BumperExc. Parksense Front/Rear Park Assist System or Tow Hooks or Chrome Tow HooksCrew Cab Wheelbase 2or Bright Front BumperExc. Parksense Front/Rear Park Assist System or Tow Hooks or Chrome Tow HooksCrew Cab8 Foot Bedor Bright Front BumperExc. Parksense Front/Rear Park Assist System or Tow Hooks or Chrome Tow HooksMega Cabor Bright Front BumperExc. Parksense Front/Rear Park Assist System or Tow Hooks or Chrome Tow HooksRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68517421AA	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineHalogen Quad Headlamps or LED Reflector Headlamps, Surround View Camera System Fitment notes — MOPAR 68517421AA Fits: Cummins EngineHalogen Quad Headlamps or LED Reflector Headlamps, Surround View Camera SystemCrew Cab Crew Cab8' Boxor Cummins EngineHalogen Quad Headlamps or LED Reflector Headlamps, Surround View Camera SystemCrew Cab Wheelbase 2or Cummins EngineHalogen Quad Headlamps or LED Reflector Headlamps, Surround View Camera SystemMega Cabor Cummins EngineHalogen Quad Headlamps or LED Reflector Headlamps, Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68517422AA	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE Headlamps, Surround View Camera System Fitment notes — MOPAR 68517422AA Fits: Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE Headlamps, Surround View Camera SystemCrew Cab Crew Cab8' Boxor Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE Headlamps, Surround View Camera SystemCrew Cab Wheelbase 2or Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE Headlamps, Surround View Camera SystemMega Cabor Cummins EngineBI-Function LED Projector Headlamps or Halogen ECE Headlamps, Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon

This table covers the wiring-harness connectors at the Headlamp. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Ignition Coil Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2087	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Gauge: 16-14 GA	View on Amazon
WELLS Fits: 6.4L V8	1P1801	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Ignition Coil. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Knock / Detonation Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2860	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalGauge: 16 Gauge Fitment notes — STANDARD MOTOR PRODUCTS S2860 Connector Shape: OvalGauge: 16 GaugeHarness LengthInches: 13Terminal Type: Bladeblack	View on Amazon

This table covers the harness connectors at the Knock / Detonation Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

License Plate Lamp Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2860	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalGauge: 16 Gauge Fitment notes — STANDARD MOTOR PRODUCTS S2860 Connector Shape: OvalGauge: 16 GaugeHarness LengthInches: 13Terminal Type: Bladeblack	View on Amazon

This table covers the harness connectors at the License Plate Lamp. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Manifold Pressure (MAP) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S2916	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the harness connectors at the Manifold Pressure (MAP) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Mass Air Flow (MAF) Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S2894	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the harness connectors at the Mass Air Flow (MAF) Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Oil Pressure Sender / Switch Connector

Brand	Part Number	Markets	Notes	Buy
HOLSTEIN Fits: 6.4L V8	2HAR0060	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2316	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalNumber of Splice Connectors Included: 3	View on Amazon

This table covers the harness connectors at the Oil Pressure Sender / Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Parking / Turn Signal Lamp Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2983	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Black Fitment notes — STANDARD MOTOR PRODUCTS S2983 Black Front	View on Amazon

This table covers the harness connectors at the Parking / Turn Signal Lamp. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Parking Aid Sensor Connector

Brand	Part Number	Markets	Notes	Buy
HOLSTEIN Fits: all 2021 2500 engines	2HAR0060	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear	View on Amazon
MOPAR Fits: all 2021 2500 engines	68377333AD	🇺🇸 US 🇨🇦 CA	Fascia Wiring Fitment notes — MOPAR 68377333AD Fascia Wiring Fits: FrontBright Front Bumper, Tow Hooks or Chrome Tow HooksExc. Parksense Front/Rear Park Assist SystemCrew Cab Wheelbase 2 or: FrontBright Front BumperExc. Parksense Front/Rear Park Assist System or Tow Hooks or Chrome Tow HooksCrew Cab Wheelbase 2 or: FrontBright Front Bumper, Front LED Fog Lamps, Tow Hooks or Chrome Tow HooksExc. Front Fog Lamps or Parksense Front/Rear Park Assist SystemCrew Cab8' Box or: FrontBright Front Bumper, Front LED Fog Lamps, Tow Hooks or Chrome Tow HooksExc. Front Fog Lamps or Parksense Front/Rear Park Assist SystemMega Cab or: FrontBright Front Bumper, Front LED Fog Lamps, Tow Hooks or Chrome Tow HooksExc. Front Fog Lamps or Parksense Front/Rear Park Assist SystemRegular Cab, 8 Foot Bed or: FrontBright Front Bumper, Front LED Fog LampsExc. Front Fog Lamps or Parksense Front/Rear Park Assist System or Tow Hooks or Chrome Tow HooksCrew Cab8' Box or: FrontBright Front Bumper, Front LED Fog LampsExc. Front Fog	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2316	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: OvalNumber of Splice Connectors Included: 3 Fitment notes — STANDARD MOTOR PRODUCTS S2316 Connector Shape: OvalNumber of Splice Connectors Included: 3 Fits: Rear or: Front	View on Amazon

This table covers the harness connectors at the Parking Aid Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Radiator Fan Motor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2267	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: Round	View on Amazon

This table covers the harness connectors at the Radiator Fan Motor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Speed Sensor Connector

Brand	Part Number	Markets	Notes	Buy
ULTRA-POWER Fits: 6.7L L6 DIESEL Turbocharged	2701055	🇺🇸 US 🇨🇦 CA	VEHICLE SPEEDTRANS INPUT AND OUTPUT SHAFT SPEED SENSOR	View on Amazon
WALKER PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	2701055	🇺🇸 US 🇨🇦 CA	Transmission Input and Output Shaft Speed Sensor	View on Amazon

This table covers the harness connectors at the Speed Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Starter Solenoid Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S2984	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Starter Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Steering Wheel Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 2500 engines	68449277AA	🇺🇸 US 🇨🇦 CA	Fits Perforated Steering Wheel with Red Stitch, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Heated Steering Wheel, Speed ControlCrew Cab Crew Cab Fitment notes — MOPAR 68449277AA Fits: Perforated Steering Wheel with Red Stitch, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Heated Steering Wheel, Speed ControlCrew Cab Crew Cab8' Boxor Perforated Steering Wheel with Red Stitch, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Heated Steering Wheel, Speed ControlCrew Cab Wheelbase 2or Perforated Steering Wheel with Red Stitch, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Heated Steering Wheel, Speed ControlMega Cabor Perforated Steering Wheel with Red Stitch, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Heated Steering Wheel, Speed ControlRegular Cab8 Foot Bedor Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Heated Steering Wheel, Adaptive Cruise Contr	View on Amazon
MOPAR Fits: all 2021 2500 engines	68449242AA	🇺🇸 US 🇨🇦 CA	Fits Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with StopCrew Cab Wheelbase 2or Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with Stop Fitment notes — MOPAR 68449242AA Fits: Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with StopCrew Cab Wheelbase 2or Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with StopCrew Cab8' Boxor Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with StopMega Cabor Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Adaptive Cruise Control with StopRegular Cab8 Foot Bedor Wood/Leather Wrapped Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Steering Wheel Mounted Audio Controls, Speed ControlCrew Cab Wheelbase 2or Wood/Leather Wrapped Steering Wheel, Integrate	View on Amazon
MOPAR Fits: all 2021 2500 engines	68449246AA	🇺🇸 US 🇨🇦 CA	Fits 4-Spoke Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Speed ControlExc. Steering Wheel Mounted Audio Controls Fitment notes — MOPAR 68449246AA Fits: 4-Spoke Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Speed ControlExc. Steering Wheel Mounted Audio ControlsCrew Cab Crew Cab8' Boxor 4-Spoke Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Speed ControlExc. Steering Wheel Mounted Audio ControlsCrew Cab Wheelbase 2or 4-Spoke Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Speed ControlExc. Steering Wheel Mounted Audio ControlsMega Cabor 4-Spoke Steering Wheel, Integrated Voice Command with Bluetooth, Electronic Range Select, Speed ControlExc. Steering Wheel Mounted Audio ControlsRegular Cab8 Foot Bed	View on Amazon

This table covers the harness connectors at the Steering Wheel. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Steering Wheel Position Sensor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2468	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Angle Sensor	View on Amazon

This table covers the harness connectors at the Steering Wheel Position Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Tailgate Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 2500 engines	68509791AA	🇺🇸 US 🇨🇦 CA	Tailgate Wiring Fitment notes — MOPAR 68509791AA Tailgate Wiring Fits: Box or Rambox Cargo Management System, Surround View Camera SystemCrew Cab Crew Cab8' Boxor Box or Rambox Cargo Management System, Surround View Camera SystemCrew Cab Wheelbase 2or Box or Rambox Cargo Management System, Surround View Camera SystemMega Cabor Box or Rambox Cargo Management System, Surround View Camera SystemRegular Cab8 Foot Bed	View on Amazon

This table covers the wiring-harness connectors at the Tailgate. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Temperature Sender / Sensor Connector

Brand	Part Number	Markets	Notes	Buy
WALKER PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	2111500	🇺🇸 US 🇨🇦 CA	Terminal Quantity: 2Includes O-Ring	View on Amazon
WELLS Fits: 6.4L V8	1P2227	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Temperature Sender / Sensor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Throttle Control Actuator Connector

Brand	Part Number	Markets	Notes	Buy
BWD/NIEHOFF Fits: 6.7L L6 DIESEL Turbocharged	PT1267	🇺🇸 US 🇨🇦 CA	Throttle Actuator ConnectorElectric Throttle Body Actuator Connector	View on Amazon
HOLSTEIN Fits: 6.7L L6 DIESEL Turbocharged	2HAR0013	🇺🇸 US 🇨🇦 CA		View on Amazon
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	S1768	🇺🇸 US 🇨🇦 CA		View on Amazon
STANDARD MOTOR PRODUCTS Fits: 6.7L L6 DIESEL Turbocharged	HP4105	🇺🇸 US 🇨🇦 CA	Handypack	View on Amazon

This table covers the harness connectors at the Throttle Control Actuator. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Adapter Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: all 2021 2500 engines	57101	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	7-Way Round RV To 4-Way Flat Adapter Fitment notes — CURT 57101 7-Way Round RV To 4-Way Flat Adapter with Back Up AlarmGM/Ford Plugwith Factory Tow Package	View on Amazon

This table covers the harness connectors at the Trailer Adapter. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Brake Switch Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: all 2021 2500 engines	51457	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Brake Control Adapter Harness Fitment notes — CURT 51457 Brake Control Adapter Harness with Quick Plug	View on Amazon
CURT Fits: all 2021 2500 engines	51458	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Brake Control Adapter Harness Fitment notes — CURT 51458 Brake Control Adapter Harness with Quick Plug	View on Amazon

This table covers the harness connectors at the Trailer Brake Switch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Connector

Brand	Part Number	Markets	Notes	Buy
CURT Popular Fits: all 2021 2500 engines	55415	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Replacement 7-Way RV Blade OEM Socket Fitment notes — CURT 55415 Replacement 7-Way RV Blade OEM Socket with Factory Tow Package	View on Amazon
CURT Popular Fits: all 2021 2500 engines	56229	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	7-Way USCAR Electrical ConnectorLength: 24 in. Fitment notes — CURT 56229 7-Way USCAR Electrical ConnectorLength: 24 in.Bonded Wire with Factory Tow Package	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2021 2500 engines	TC656	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Towing PackageOE Style	View on Amazon
CURT Fits: all 2021 2500 engines	56415	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Replacement 7-Way RV Blade OEM SocketTwist-In Fitment notes — CURT 56415 Replacement 7-Way RV Blade OEM SocketTwist-In with Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	55515	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring ConnectorOE 4-Way Flat Fitment notes — CURT 55515 Custom Wiring ConnectorOE 4-Way FlatPlugs Into USCAR Replacement2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	56515	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Connector5-Way Flat Fitment notes — CURT 56515 Custom Wiring Connector5-Way Flat 2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	55774	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way Fitment notes — CURT 55774 OEM Vehicle to Trailer Connector with Harness7-Way and 4-Way with Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	57015	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	OEM Replacement Dual-Output 7 and 4 Way ConnectorPlugs Into USCAR Socket	View on Amazon
CURT Fits: all 2021 2500 engines	55384	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Connector4-Way Flat Fitment notes — CURT 55384 Custom Wiring Connector4-Way FlatRetains Use of 7 Way Round Connector 2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	57020	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged Fitment notes — CURT 57020 OEM Replacement Dual-Output 7 and 4 Way ConnectorPackaged Factory TowPlugs Into USCAR	View on Amazon
CURT Fits: all 2021 2500 engines	56584	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Harness5-Way Flat Fitment notes — CURT 56584 Custom Wiring Harness5-Way FlatRetains Use Of 7-Way OEM 2-Wire Systemwith Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	58995	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Towed-Vehicle RV HarnessConnects Towed Vehicle To RV Using A Standard 4-Way Flat Trailer Plug Fitment notes — CURT 58995 Towed-Vehicle RV HarnessConnects Towed Vehicle To RV Using A Standard 4-Way Flat Trailer Plug with LED Tail Lights	View on Amazon
DORMAN Fits: all 2021 2500 engines	924611	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
MOPAR Fits: all 2021 2500 engines	68573359AA	🇺🇸 US 🇨🇦 CA	Fits Trailer Tow with 4-Pin Connector Wiring, 7 Pin Wiring HarnessCrew Cab Wheelbase 2or Trailer Tow with 4-Pin Connector Wiring, 7 Pin Wiring Harness Fitment notes — MOPAR 68573359AA Fits: Trailer Tow with 4-Pin Connector Wiring, 7 Pin Wiring HarnessCrew Cab Wheelbase 2or Trailer Tow with 4-Pin Connector Wiring, 7 Pin Wiring HarnessCrew Cab8' Boxor Trailer Tow with 4-Pin Connector Wiring, 7 Pin Wiring HarnessMega Cabor Trailer Tow with 4-Pin Connector Wiring, 7 Pin Wiring HarnessRegular Cab8 Foot Bed	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	TC654	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Towing Packagewith 7 Way	View on Amazon

This table covers the trailer-lighting connectors at the hitch. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Trailer Extension Connector

Brand	Part Number	Markets	Notes	Buy
CURT Fits: all 2021 2500 engines	56475	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Harness Extension Fitment notes — CURT 56475 Custom Wiring Harness Extension 20"Uscar To Uscarwith Factory Tow Package	View on Amazon
CURT Fits: all 2021 2500 engines	56070010	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Harness Extension7 ft. Fitment notes — CURT 56070010 Custom Wiring Harness Extension7 ft.Pack of 10 7 WayFor 5th Wheel or Gooseneck In Bed Connection	View on Amazon
CURT Fits: all 2021 2500 engines	56000010	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Custom Wiring Harness ExtensionPack of 10 Fitment notes — CURT 56000010 Custom Wiring Harness ExtensionPack of 10Length: 10 ft. 7 WayFor 5th Wheel or Gooseneck In Bed Connection	View on Amazon

This table covers the harness connectors at the Trailer Extension. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Transmission-Automatic Wiring Harness / Connector

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: 6.4L V8	68516610AB	🇺🇸 US 🇨🇦 CA	Fits 180 Amps Alternator 180 Amps AlternatorCrew Cab Crew Cab Fitment notes — MOPAR 68516610AB Fits: 180 Amps Alternator 180 Amps AlternatorCrew Cab Crew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 180 Amps Alternator 180 Amps AlternatorCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 180 Amps Alternator 180 Amps AlternatorRegular Cab8 Foot Bed8-SPD Auto 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.4L V8	68516611AB	🇺🇸 US 🇨🇦 CA	Fits 180 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 2 Fitment notes — MOPAR 68516611AB Fits: 180 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseCrew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseMega Cab8-Speed Automatic 8HP75-LCV Transmission or: 180 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseRegular Cab8 Foot Bed8-Speed Automatic 8HP75-LCV Transmission or: 180 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 28-Speed Automatic 8HP75-LCV Transmission or: 180 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseCrew Cab8 Foot Bed8-Speed Automatic 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.4L V8	68516612AB	🇺🇸 US 🇨🇦 CA	Fits 180 Amp Alternator, Electric Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 2 Fitment notes — MOPAR 68516612AB Fits: 180 Amp Alternator, Electric Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Electric Shift-On-The-Fly Transfer CaseCrew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Electric Shift-On-The-Fly Transfer CaseMega Cab8-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Electric Shift-On-The-Fly Transfer CaseRegular Cab8 Foot Bed8-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Elec Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Elec Shift-On-The-Fly Transfer CaseCrew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Elec Shift-On-The-Fly Transfer CaseMega Cab8-SPD Auto 8HP75-LCV Transmission or: 180 Amp Alternator, Elec Shift-On-The-Fly Transfer CaseRegular Cab8 Foot Bed8-SPD Auto 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.4L V8	68516613AB	🇺🇸 US 🇨🇦 CA	Fits 220 Amps Alternator 220 Amps AlternatorExc. Dual Alternators Rated At 380 Amps Fitment notes — MOPAR 68516613AB Fits: 220 Amps Alternator 220 Amps AlternatorExc. Dual Alternators Rated At 380 AmpsCrew Cab Crew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 220 Amps Alternator 220 Amps AlternatorExc. Dual Alternators Rated At 380 AmpsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 220 Amps Alternator 220 Amps AlternatorExc. Dual Alternators Rated At 380 AmpsRegular Cab8 Foot Bed8-SPD Auto 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.4L V8	68516614AB	🇺🇸 US 🇨🇦 CA	Fits 220 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 Amps Fitment notes — MOPAR 68516614AB Fits: 220 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 AmpsCrew Cab Crew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 220 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 AmpsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 220 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 AmpsMega Cab8-SPD Auto 8HP75-LCV Transmission or: 220 Amp Alternator, MAN Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 AmpsRegular Cab8 Foot Bed8-SPD Auto 8HP75-LCV Transmission or: 220 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 AmpsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission or: 220 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseExc. Dual Alternators Rated At 380 AmpsCrew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: 220 Amp Alternator, Manual Shift-On-The-Fly Transfer CaseExc. Dua	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68484712AB	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineElectric Shift-On-The-Fly Transfer Case Fitment notes — MOPAR 68484712AB Fits: Cummins EngineElectric Shift-On-The-Fly Transfer CaseRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins engineElectric Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineElectric Shift-On-The-Fly Transfer CaseMega Cab6 Speed Automatic 68RFE Transmission or: Cummins EngineElectric Shift-On-The-Fly Transfer CaseCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68484713AB	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineManual Shift-On-The-Fly Transfer Case Fitment notes — MOPAR 68484713AB Fits: Cummins EngineManual Shift-On-The-Fly Transfer CaseExcept Underground CalibrationCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission or: Cummins EngineManual Shift-On-The-Fly Transfer CaseExcept Underground CalibrationCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineManual Shift-On-The-Fly Transfer CaseExcept Underground CalibrationMega Cab6 Speed Automatic 68RFE Transmission or: Cummins EngineManual Shift-On-The-Fly Transfer CaseExcept Underground CalibrationRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68484714AB	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineExcept Underground Calibration Fitment notes — MOPAR 68484714AB Fits: Cummins EngineExcept Underground CalibrationCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineExcept Underground CalibrationRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins EngineExcept Underground CalibrationCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68484715AB	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineMAN Shift-On-The-Fly Transfer Case, Underground Calibration Fitment notes — MOPAR 68484715AB Fits: Cummins EngineMAN Shift-On-The-Fly Transfer Case, Underground CalibrationCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission or: Cummins EngineMAN Shift-On-The-Fly Transfer Case, Underground CalibrationCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineMAN Shift-On-The-Fly Transfer Case, Underground CalibrationMega Cab6 Speed Automatic 68RFE Transmission or: Cummins EngineMAN Shift-On-The-Fly Transfer Case, Underground CalibrationRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68484716AB	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineUnderground Calibration Fitment notes — MOPAR 68484716AB Fits: Cummins EngineUnderground CalibrationCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineUnderground CalibrationRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins EngineUnderground CalibrationCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE Transmission	View on Amazon

This table covers the wiring-harness connectors at the Transmission-Automatic. Typical signs include an intermittent fault that moves when you wiggle the harness, or a melted or corroded plug. Match terminal count and keyway. Repair with heat-shrink terminals, not twist-and-tape.

Vapor Canister Purge Valve / Solenoid Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	HP4325	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	HandypackConnector Shape: Rectangle Fitment notes — STANDARD MOTOR PRODUCTS HP4325 HandypackConnector Shape: RectangleHarness Length16-1/2 "Terminal Type: Blade	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 6.4L V8	S1024	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: RectangleHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S1024 Connector Shape: RectangleHarness Length16-1/2 "Terminal Type: Blade	View on Amazon

This table covers the harness connectors at the Vapor Canister Purge Valve / Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Vapor Leak Detection Pump Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	HP4325	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	HandypackConnector Shape: Rectangle Fitment notes — STANDARD MOTOR PRODUCTS HP4325 HandypackConnector Shape: RectangleHarness Length16-1/2 "Terminal Type: Blade	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S1024	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: RectangleHarness Length Fitment notes — STANDARD MOTOR PRODUCTS S1024 Connector Shape: RectangleHarness Length16-1/2 "Terminal Type: Blade	View on Amazon

This table covers the harness connectors at the Vapor Leak Detection Pump. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Variable Power Steering Solenoid Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S3145	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Variable Power Steering Solenoid. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Washer Pump Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S2279	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the harness connectors at the Washer Pump. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Window Motor Connector

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 2500 engines	S1922	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Shape: RectangleWiring Harness Length (mm): 254 Fitment notes — STANDARD MOTOR PRODUCTS S1922 Connector Shape: RectangleWiring Harness Length (mm): 254Front	View on Amazon

This table covers the harness connectors at the Window Motor. Typical signs include an intermittent fault that moves when you wiggle the plug, green corrosion, or a melted housing. Match terminal count and keyway, not just color. Many families look identical and will not lock.

Buying Electrical Connector Parts for a 2021 Ram 2500

On this vehicle, the connector system supplies the pigtails and connector bodies that terminate the vehicle harness at lamps, sensors and modules.

Match the engine first. Some electrical connector parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
Read the notes on each row for position, trim and spec qualifiers before you order.
Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.
Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Trailer Connector and Headlamp Wiring Harness / Connector .

Frequently Asked Questions

How many electrical connector parts fit the 2021 Ram 2500?

Our catalog currently lists 119 electrical connector parts for the 2021 Ram 2500 across 50 subcategories and 11 brands, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.

Do electrical connector parts differ between 2021 Ram 2500 engines?

Some do. 65 parts fit every engine; the other 54 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.

What are the signs of electrical connector problems on a 2021 Ram 2500?

Common symptoms include intermittent faults that move when the harness is wiggled, green corrosion inside a plug, or melted connector housings near heat sources. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, use heat-shrink crimp connectors rather than twist-and-tape for any pigtail splice, especially outside the cabin.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Ram 2500 was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 2021 Ram 2500?

First match the engine — each row shows which engine(s) the part fits. Then match the connector by terminal count and keyway, not just appearance — many families look identical but will not lock. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2021 Ram 2500

Belt Drive Body & Lamp Assembly Brake & Wheel Hub Cooling System Drivetrain Electrical Electrical Bulb & Socket Electrical Switch & Relay Engine Exhaust & Emission Fuel & Air Heat & Air Conditioning Ignition Interior Steering Suspension Automatic Transmission Wheel Wiper & Washer

Electrical Connector Parts for Other Ram 2500 Years

2026 Ram 2500 2025 Ram 2500 2024 Ram 2500 2023 Ram 2500 2022 Ram 2500 2020 Ram 2500 2019 Ram 2500 2018 Ram 2500 2017 Ram 2500 2016 Ram 2500 2015 Ram 2500 2014 Ram 2500

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Published by AutoFactsDB from manufacturer application data. How fitment is matched Report a fitment error