2021 Ram 4500 Electrical Switch & Relay Parts: OEM & Replacement (55 Parts)

55 Electrical switch & relay parts are listed for the 2021 Ram 4500, in 17 part types, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.

On the 2021 Ram 4500, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. Most of the listed parts are Power Window Switch (10 parts), Instrument Cluster Switch (7 parts) and Headlamp Switch (6 parts). The other 14 part types cover the remaining 32 parts.

4WD Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 4500 engines	68368381AF	🇺🇸 US 🇨🇦 CA	Fits Electric Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 1 Fitment notes — MOPAR 68368381AF Fits: Electric Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS69RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 36 Speed Auto Aisin AS69RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 46 Speed Auto Aisin AS69RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 46 Speed Auto Aisin AS69RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseCrew Cab197.4" Wheelbase6 Speed Auto Aisin AS66RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseCrew Cab197.4" Wheelbase6 Speed Auto Aisin AS69RC HD Trans or: Electric Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 16 Speed Automatic Aisin AS66RC HD Transmission or: Electric Shift-O	View on Amazon

This table covers the 4WD switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

A/C Pressure Safety Switch

Brand	Part Number	Markets	Notes	Buy
VEMO Fits: all 2021 4500 engines	V33730052	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the A/C Pressure Safety switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

A/C Refrigerant Pressure Switch

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 4500 engines	904620	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the pressure switches on the A/C circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Adjustable Pedal Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 4500 engines	56046113AA	🇺🇸 US 🇨🇦 CA	Fits Power Adjustable Pedals with Memory or Power Adjustable PedalsExc. Heated Steering Wheel Fitment notes — MOPAR 56046113AA Fits: Power Adjustable Pedals with Memory or Power Adjustable PedalsExc. Heated Steering WheelRegular Cab Chassis Wheelbase 2or Power Adjustable Pedals with Memory or Power Adjustable PedalsExc. Heated Steering WheelRegular Cab Chassis Wheelbase 3or Power Adjustable Pedals with Memory or Power Adjustable PedalsExc. Heated Steering WheelRegular Cab Chassis Wheelbase 4or Power Adjustable Pedals with Memory or Power Adjustable PedalsExc. Heated Steering WheelRegular Cab Chassis Wheelbase 1or Power Adjustable Pedals with Memory or Power Adjustable Pedals, Heated Steering WheelRegular Cab Chassis Wheelbase 4or Power Adjustable Pedals with Memory or Power Adjustable Pedals, Heated Steering WheelRegular Cab Chassis Wheelbase 2or Power Adjustable Pedals with Memory or Power Adjustable Pedals, Heated Steering WheelRegular Cab Chassis Wheelbase 3or Power Adjustable Pedals with Memory or Power Adjustable Pedals, Heated Steering WheelRegular Cab Chassis Wheelbase 1or Power Adjustable Pedals	View on Amazon

This table covers the Adjustable Pedal switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Brake Light Switch

Brand	Part Number	Markets	Notes	Buy
VEMO Fits: all 2021 4500 engines	V33730040	🇺🇸 US 🇨🇦 CA	Electric7 8700AE	View on Amazon

This table covers the pedal-mounted switch that turns on the brake lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Dimmer Switch

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	CBS1925	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the dimmer switches that select headlamp high and low beam. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Door Lock Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: all 2021 4500 engines	68262253AC	🇺🇸 US 🇨🇦 CA	Fits FrontSpeed Sensitive Power Locks, Power Front Windows, 1-Touch Up & Down Fitment notes — MOPAR 68262253AC Fits: FrontSpeed Sensitive Power Locks, Power Front Windows, 1-Touch Up & DownCrew Cab Wheelbase 4 or: FrontSpeed Sensitive Power Locks, Power Front Windows, 1-Touch,up & DownCrew Cab197.4" Wheelbase	View on Amazon
MOPAR Fits: all 2021 4500 engines	68268251AC	🇺🇸 US 🇨🇦 CA	Fits FrontSpeed Sensitive Power Locks, Power Front Windows, 1-Touch Up & Down Fitment notes — MOPAR 68268251AC Fits: FrontSpeed Sensitive Power Locks, Power Front Windows, 1-Touch Up & DownCrew Cab Wheelbase 4 or: FrontSpeed Sensitive Power Locks, Power Front Windows, 1-Touch,up & DownCrew Cab197.4" Wheelbase	View on Amazon
MOPAR Fits: all 2021 4500 engines	68382476AB	🇺🇸 US 🇨🇦 CA	Fits FrontSpeed Sensitive Power Locks, Power Windows, Front 1-Touch Down Fitment notes — MOPAR 68382476AB Fits: FrontSpeed Sensitive Power Locks, Power Windows, Front 1-Touch DownRegular Cab Chassis Wheelbase 1 or: FrontSpeed Sensitive Power Locks, Power Windows, Front 1-Touch DownRegular Cab Chassis Wheelbase 2 or: FrontSpeed Sensitive Power Locks, Power Windows, Front 1-Touch DownRegular Cab Chassis Wheelbase 3 or: FrontSpeed Sensitive Power Locks, Power Windows, Front 1-Touch DownRegular Cab Chassis Wheelbase 4	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	DWS1994	🇺🇸 US 🇨🇦 CA	Right	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	DWS1899	🇺🇸 US 🇨🇦 CA	Front Leftwithout Power Folding Mirrors Fitment notes — STANDARD MOTOR PRODUCTS DWS1899 Front Leftwithout Power Folding Mirrorswith Auto Down	View on Amazon

This table covers the Door Lock switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Glove Box Lamp Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 4500 engines	4565022	🇺🇸 US 🇨🇦 CA	Fits Glove Box LampCrew Cab Fitment notes — MOPAR 4565022 Fits: Glove Box LampCrew Cab197.4" Wheelbas or: Glove Box LampCrew Cab Wheelbase 4or Glove Box LampRegular Cab Chassis Wheelbase 1or Glove Box LampRegular Cab Chassis Wheelbase 2or Glove Box LampRegular Cab Chassis Wheelbase 3or Glove Box LampRegular Cab Chassis Wheelbase 4	View on Amazon
MOPAR Fits: all 2021 4500 engines	68312671AB	🇺🇸 US 🇨🇦 CA	Fits Dual Glove Boxes or Glove Box LampCrew Cab Wheelbase 4or Dual Glove Boxes or Glove Box Lamp Fitment notes — MOPAR 68312671AB Fits: Dual Glove Boxes or Glove Box LampCrew Cab Wheelbase 4or Dual Glove Boxes or Glove Box LampCrew Cab197.4" Wheelbas or: Dual Glove Boxes or Glove Box LampRegular Cab Chassis Wheelbase 1or Dual Glove Boxes or Glove Box LampRegular Cab Chassis Wheelbase 2or Dual Glove Boxes or Glove Box LampRegular Cab Chassis Wheelbase 3or Dual Glove Boxes or Glove Box LampRegular Cab Chassis Wheelbase 4	View on Amazon
ROSTRA Fits: all 2021 4500 engines	651381	🇺🇸 US 🇨🇦 CA		View on Amazon
WELLS Fits: all 2021 4500 engines	1S2892	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the Glove Box Lamp switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Headlamp Switch

Economy

Brand	Part Number	Markets	Notes	Buy
AUTOTECNICA Fits: all 2021 4500 engines	RM1320829	🇺🇸 US 🇨🇦 CA	Fog Lamps	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: all 2021 4500 engines	68156061AD	🇺🇸 US 🇨🇦 CA	Fits Front Fog Lamps Fitment notes — MOPAR 68156061AD Fits: Front Fog Lamps or: Front LED Fog Lamps, Overhead Ash Tray/Cupholder Lamp, Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedCargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Door Accent Lighting or: Rear Door Accent Lighting or Overhead ConsoleCrew Cab Crew Cab197.4" Wheelbas or: Front Fog Lamps or: Front LED Fog Lamps, Overhead Ash Tray/Cupholder Lamp, Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedCargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Door Accent Lighting or: Rear Door Accent Lighting or Overhead ConsoleCrew Cab Wheelbase 4 or: Front Fog Lamps or: Front LED Fog Lamps, Overhead Ash Tray/Cupholder Lamp, Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedCargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Fro	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2021 4500 engines	HLS1772	🇺🇸 US 🇨🇦 CA	Except Rear Fog Lightswith Fog Lights Fitment notes — STANDARD MOTOR PRODUCTS HLS1772 Except Rear Fog Lightswith Fog Lightswith Automatic HeadlightsDash Mounted	View on Amazon
MOPAR Fits: all 2021 4500 engines	68373900AB	🇺🇸 US 🇨🇦 CA	Fits Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Fog Lamps Fitment notes — MOPAR 68373900AB Fits: Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Fog Lamps or: Front LED Fog Lamps or Overhead Ash Tray/Cupholder LampCrew Cab Crew Cab197.4" Wheelbas or: Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Fog Lamps or: Front LED Fog Lamps or Overhead Ash Tray/Cupholder LampCrew Cab Wheelbase 4or Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Fog Lamps or: Front LED Fog Lamps or Overhead Ash Tray/Cupholder LampRegular Cab Chassis Wheelbase 1or Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Fog Lamps or: Front LED Fog Lamps or Overhead Ash Tray/Cupholder LampRegular Cab Chassis Wheelbase 2or Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Fog Lamps or: Front LED Fog Lamps or Overhead Ash Tray/Cupholder LampRegular Cab	View on Amazon
MOPAR Fits: all 2021 4500 engines	68373903AB	🇺🇸 US 🇨🇦 CA	Fits Cargo Lamp or Center High Mount Stop Lamp with CameraFront Fog Lamps Fitment notes — MOPAR 68373903AB Fits: Cargo Lamp or Center High Mount Stop Lamp with CameraFront Fog Lamps or: Front LED Fog LampsExc. Overhead Ash Tray/Cupholder Lamp or AUX Reverse Lamps, Mirror-MountedCrew Cab Crew Cab197.4" Wheelbas or: Cargo Lamp or Center High Mount Stop Lamp with CameraFront Fog Lamps or: Front LED Fog LampsExc. Overhead Ash Tray/Cupholder Lamp or AUX Reverse Lamps, Mirror-MountedCrew Cab Wheelbase 4or Cargo Lamp or Center High Mount Stop Lamp with CameraFront Fog Lamps or: Front LED Fog LampsExc. Overhead Ash Tray/Cupholder Lamp or AUX Reverse Lamps, Mirror-MountedRegular Cab Chassis Wheelbase 1or Cargo Lamp or Center High Mount Stop Lamp with CameraFront Fog Lamps or: Front LED Fog LampsExc. Overhead Ash Tray/Cupholder Lamp or AUX Reverse Lamps, Mirror-MountedRegular Cab Chassis Wheelbase 2or Cargo Lamp or Center High Mount Stop Lamp with CameraFront Fog Lamps or: Front LED Fog LampsExc. Overhead Ash Tray/Cupholder Lamp or AUX Reverse Lamps, Mirror-MountedRegular Cab Chassis W	View on Amazon
MOPAR Fits: all 2021 4500 engines	68156065AC	🇺🇸 US 🇨🇦 CA	Fits Front Fog Lamps Fitment notes — MOPAR 68156065AC Fits: Front Fog Lamps or: Front LED Fog Lamps, Overhead Ash Tray/Cupholder Lamp, Overhead Console, Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedCargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Door Accent Lighting or: Rear Door Accent LightingCrew Cab Crew Cab197.4" Wheelbas or: Front Fog Lamps or: Front LED Fog Lamps, Overhead Ash Tray/Cupholder Lamp, Overhead Console, Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedCargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedExc. Front Door Accent Lighting or: Rear Door Accent LightingCrew Cab Wheelbase 4 or: Front Fog Lamps or: Front LED Fog Lamps, Overhead Ash Tray/Cupholder Lamp, Overhead Console, Cargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-MountedCargo Lamp or Center High Mount Stop Lamp with Camera or AUX Reverse Lamps, Mirror-Mou	View on Amazon

This table covers the column or dash switches that control the exterior lamps. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

HVAC Control Switch / Panel

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 4500 engines	68340280AD	🇺🇸 US 🇨🇦 CA	Lower Fitment notes — MOPAR 68340280AD Lower Fits: A/CExc. Diesel Exhaust Brake or Exterior Mirrors with Heating Element or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Seats or Integrated Center Stack Radio or Disassociated Touchscreen Display or: Rear Window DefrosterCrew Cab Crew Cab197.4" Wheelbas or: A/CExc. Diesel Exhaust Brake or Exterior Mirrors with Heating Element or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Seats or Integrated Center Stack Radio or Disassociated Touchscreen Display or: Rear Window DefrosterCrew Cab Wheelbase 4or A/CExc. Diesel Exhaust Brake or Exterior Mirrors with Heating Element or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Seats or Integrated Center Stack Radio or Disassociated Touchscreen Display or: Rear Window DefrosterRegular Cab Chassis Wheelbase 1or A/CExc. Diesel Exhaust Brake or Exterior Mirrors with Heating Element or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Se	View on Amazon
MOPAR Fits: all 2021 4500 engines	68340281AD	🇺🇸 US 🇨🇦 CA	Lower Fitment notes — MOPAR 68340281AD Lower Fits: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. Diesel Exhaust Brake or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Seats or Integrated Center Stack Radio or Disassociated Touchscreen Display or 12.0" TouchsCrew Cab Crew Cab197.4" Wheelbas or: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. Diesel Exhaust Brake or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Seats or Integrated Center Stack Radio or Disassociated Touchscreen Display or 12.0" TouchsCrew Cab Wheelbase 4or Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. Diesel Exhaust Brake or Lane Departure Warning Plus or Heated Steering Wheel or Ventilated Front Seats or Integrated Center Stack Radio or Disassociated Touchscreen Display or 12.0" TouchsRegular Cab Chassis Wheelbase 1or Air Conditioning, Exterior Mirrors with Heating Element or: Rear Windo	View on Amazon
MOPAR Fits: all 2021 4500 engines	68340283AD	🇺🇸 US 🇨🇦 CA	Lower Fitment notes — MOPAR 68340283AD Lower Fits: A/C, Exterior Mirrors with Heating Element, Integrated Center Stack RadioExc. Lane Departure Warning PLUS or Heated Steering Wheel or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeCrew Cab Crew Cab197.4" Wheelbas or: A/C, Exterior Mirrors with Heating Element, Integrated Center Stack RadioExc. Lane Departure Warning PLUS or Heated Steering Wheel or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeCrew Cab Wheelbase 4or A/C, Exterior Mirrors with Heating Element, Integrated Center Stack RadioExc. Lane Departure Warning PLUS or Heated Steering Wheel or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeRegular Cab Chassis Wheelbase 1or A/C, Exterior Mirrors with Heating Element, Integrated Center Stack RadioExc. Lane Departure Warning PLUS or Heated Steering Wheel or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeRegular Cab Chas	View on Amazon
MOPAR Fits: all 2021 4500 engines	68340284AD	🇺🇸 US 🇨🇦 CA	Lower Fitment notes — MOPAR 68340284AD Lower Fits: Air Conditioning, Exterior Mirrors with Heating Element, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeCrew Cab Crew Cab197.4" Wheelbas or: Air Conditioning, Exterior Mirrors with Heating Element, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeCrew Cab Wheelbase 4or Air Conditioning, Exterior Mirrors with Heating Element, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeRegular Cab Chassis Wheelbase 1or Air Conditioning, Exterior Mirrors with Heating Element, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Displ	View on Amazon
MOPAR Fits: all 2021 4500 engines	68340286AD	🇺🇸 US 🇨🇦 CA	Lower Fitment notes — MOPAR 68340286AD Lower Fits: Automatic Temp Control A/C with Dual Zone Control, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeCrew Cab Crew Cab197.4" Wheelbas or: Automatic Temp Control A/C with Dual Zone Control, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeCrew Cab Wheelbase 4or Automatic Temp Control A/C with Dual Zone Control, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust BrakeRegular Cab Chassis Wheelbase 1or Automatic Temp Control A/C with Dual Zone Control, Integrated Center Stack Radio, Heated Steering WheelExc. Lane Departure Warning PLUS or Ventilated Front Seats or Disassociated Touchscreen Display or DIESEL Exhaust Bra	View on Amazon

This table covers the HVAC Control Switch panels.

Ignition Starter Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 4500 engines	6QE18TX7AA	🇺🇸 US 🇨🇦 CA	PUSH BUTTON Fitment notes — MOPAR 6QE18TX7AA PUSH BUTTON Fits: Pushbutton StartCrew Cab Wheelbase 4or Pushbutton StartCrew Cab Crew Cab197.4" Wheelbas or: Pushbutton StartRegular Cab Chassis Wheelbase 1or Pushbutton StartRegular Cab Chassis Wheelbase 2or Pushbutton StartRegular Cab Chassis Wheelbase 3or Pushbutton StartRegular Cab Chassis Wheelbase 4	View on Amazon

This table covers the ignition switches that feed the starter circuit. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Instrument Cluster Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: all 2021 4500 engines	68309259AD	🇺🇸 US 🇨🇦 CA	Fits Trailer Brake ControlCrew Cab Wheelbase 4or Trailer Brake Control Fitment notes — MOPAR 68309259AD Fits: Trailer Brake ControlCrew Cab Wheelbase 4or Trailer Brake ControlCrew Cab197.4" Wheelbas or: Trailer Brake ControlRegular Cab Chassis Wheelbase 1or Trailer Brake ControlRegular Cab Chassis Wheelbase 2or Trailer Brake ControlRegular Cab Chassis Wheelbase 3or Trailer Brake ControlRegular Cab Chassis Wheelbase 4	View on Amazon
MOPAR Fits: all 2021 4500 engines	68596337AA	🇺🇸 US 🇨🇦 CA	Fits Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left Side Fitment notes — MOPAR 68596337AA Fits: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideCrew Cab Wheelbase 4or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideCrew Cab Crew Cab197.4" Wheelbas or: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 1or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 2or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 3or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Of	View on Amazon
MOPAR Fits: all 2021 4500 engines	68309258AB	🇺🇸 US 🇨🇦 CA	Fits Instrument Panel Parts Module Dummy CoverExc. Trailer Brake Control Fitment notes — MOPAR 68309258AB Fits: Instrument Panel Parts Module Dummy CoverExc. Trailer Brake ControlCrew Cab Wheelbase 4or Instrument Panel Parts Module Dummy CoverExc. Trailer Brake ControlCrew Cab197.4" Wheelbas or: Instrument Panel Parts Module Dummy CoverExc. Trailer Brake ControlRegular Cab Chassis Wheelbase 1or Instrument Panel Parts Module Dummy CoverExc. Trailer Brake ControlRegular Cab Chassis Wheelbase 2or Instrument Panel Parts Module Dummy CoverExc. Trailer Brake ControlRegular Cab Chassis Wheelbase 3or Instrument Panel Parts Module Dummy CoverExc. Trailer Brake ControlRegular Cab Chassis Wheelbase 4	View on Amazon
MOPAR Fits: all 2021 4500 engines	68309259AC	🇺🇸 US 🇨🇦 CA	Fits Trailer Brake ControlRegular Cab Chassis Wheelbase 2or Trailer Brake Control Fitment notes — MOPAR 68309259AC Fits: Trailer Brake ControlRegular Cab Chassis Wheelbase 2or Trailer Brake ControlRegular Cab Chassis Wheelbase 4LT. Duty 4WD or: Trailer Brake ControlRegular Cab Chassis Wheelbase 3 Fits: Trailer Brake ControlCrew Cab or Trailer Brake ControlRegular Cab Chassis Wheelbase 4or Trailer Brake ControlRegular Cab Chassis Wheelbase 3	View on Amazon
MOPAR Fits: all 2021 4500 engines	68476018AB	🇺🇸 US 🇨🇦 CA	Fits Black SwitchesExc. Diesel Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Power Take Off Prep or Power Take Off Prep - Left Side Fitment notes — MOPAR 68476018AB Fits: Black SwitchesExc. Diesel Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Power Take Off Prep or Power Take Off Prep - Left SideCrew Cab Crew Cab197.4" Wheelbas or: Black SwitchesExc. Diesel Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Power Take Off Prep or Power Take Off Prep - Left SideCrew Cab Wheelbase 4or Black SwitchesExc. Diesel Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 1or Black SwitchesExc. Diesel Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 2or Black SwitchesExc. Diesel Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Power Take Off Pr	View on Amazon
MOPAR Fits: all 2021 4500 engines	68476024AB	🇺🇸 US 🇨🇦 CA	Fits Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left Side Fitment notes — MOPAR 68476024AB Fits: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideCrew CabLT. Duty 4WD or: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 1or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 2or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 3LT. Duty 4WD or: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 4LT. Duty 4WD Fits: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 2LT. Duty 4WD or: Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 4or Parksense Front/Rear Park Assist System, Black SwitchesExc. Diesel Exhaust Brake or Power Take Off Prep or Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 1	View on Amazon
MOPAR Fits: all 2021 4500 engines	68476036AB	🇺🇸 US 🇨🇦 CA	Fits Power Take Off Prep OR Power Take Off Prep - Left Side, Black SwitchesExc. Diesel Exhaust Brake Or Park Sense Rear Park Assist System Or Park Sense Front/Rear Park Assist System Fitment notes — MOPAR 68476036AB Fits: Power Take Off Prep OR Power Take Off Prep - Left Side, Black SwitchesExc. Diesel Exhaust Brake Or Park Sense Rear Park Assist System Or Park Sense Front/Rear Park Assist SystemRegular Cab Chassis Wheelbase 4or Power Take Off Prep or Power Take Off Prep - Left Side, Black SwitchesExc. DIESEL Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist SystemRegular Cab Chassis Wheelbase 1or Power Take Off Prep or Power Take Off Prep - Left Side, Black SwitchesExc. DIESEL Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist SystemRegular Cab Chassis Wheelbase 2or Power Take Off Prep or Power Take Off Prep - Left Side, Black SwitchesExc. DIESEL Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist SystemCrew Cab Wheelbase 4or Power Take Off Prep or Power Take Off Prep - Left Side, Black SwitchesExc. DIESEL Exhaust Brake or Parksense Rear Park Assist System or Parksense Front/	View on Amazon

This table covers the Instrument Cluster switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Oil Pressure Sender / Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: 6.4L V8	987010	🇺🇸 US 🇨🇦 CA		View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: 6.4L V8	68334877AA	🇺🇸 US 🇨🇦 CA	Fits Heavy Duty HEMI MDS Engine.Regular Cab Chassis Wheelbase 3or Heavy Duty HEMI MDS Engine. Fitment notes — MOPAR 68334877AA Fits: Heavy Duty HEMI MDS Engine.Regular Cab Chassis Wheelbase 3or Heavy Duty HEMI MDS Engine.Regular Cab Chassis Wheelbase 4or Heavy Duty HEMI MDS EngineRegular Cab Chassis Wheelbase 1or Heavy Duty HEMI MDS EngineRegular Cab Chassis Wheelbase 2or Heavy Duty HEMI MDS Engine.Crew Cab Wheelbase 4or Heavy Duty HEMI MDS Engine.Crew Cab197.4" Wheelbase	View on Amazon
MOPAR Fits: 6.4L V8	68019700AA	🇺🇸 US 🇨🇦 CA	Fits Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left Side Fitment notes — MOPAR 68019700AA Fits: Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left SideCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 36 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 46 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Body 94Exc. Power Take Off Prep - Left SideCrew Cab197.4" Wheelbase6 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Exc. Power Take Off Prep - Left SideCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD Trans or: Heavy Duty HEMI MDS Engine.Exc. Power Take Off Prep - Left SideRegular Cab	View on Amazon

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68019700AA	🇺🇸 US 🇨🇦 CA	Fits Cummins Engine.Exc. Power Take Off Prep - Left Side Fitment notes — MOPAR 68019700AA Fits: Cummins Engine.Exc. Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 36 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 36 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Exc. Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 46 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 46 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Exc. Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Exc. Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.Power Take Off Prep - Left SideRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS69RC HD Trans or: Cummins Engine.	View on Amazon

This table covers the senders and switches that report oil pressure to the gauge or lamp. Typical signs include a lamp that stays on, or a gauge that never moves. Confirm power and ground at the connector before replacing the sender or switch.

Power Seat Switch

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 4500 engines	901477	🇺🇸 US 🇨🇦 CA	Front Left8 Way Fitment notes — DORMAN 901477 Front Left8 WayHigh Current	View on Amazon
MOPAR Fits: all 2021 4500 engines	56049431AG	🇺🇸 US 🇨🇦 CA	Fits Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryCrew Cab Wheelbase 4or Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals Memory Fitment notes — MOPAR 56049431AG Fits: Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryCrew Cab Wheelbase 4or Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryCrew Cab Crew Cab197.4" Wheelbas or: Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryRegular Cab Chassis Wheelbase 1or Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryRegular Cab Chassis Wheelbase 2or Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryRegular Cab Chassis Wheelbase 3or Driver Seat - Power Adjust 8-Way, Radio/Driver Seat/Mirrors/Pedals MemoryRegular Cab Chassis Wheelbase 4	View on Amazon
MOPAR Fits: all 2021 4500 engines	56049432AG	🇺🇸 US 🇨🇦 CA	Fits Front Passenger Seat - Power Adjust 8-WayRegular Cab Chassis Wheelbase 3 Fitment notes — MOPAR 56049432AG Fits: Front Passenger Seat - Power Adjust 8-WayRegular Cab Chassis Wheelbase 3 or: Front Passenger Seat - Power Adjust 8-WayRegular Cab Chassis Wheelbase 4 or: Front Passenger Seat - Power Adjust 8-WayRegular Cab Chassis Wheelbase 1 or: Front Passenger Seat - Power Adjust 8-WayRegular Cab Chassis Wheelbase 2 or: Front Passenger Seat - Power Adjust 8-WayCrew Cab Wheelbase 4 or: Front Passenger Seat - Power Adjust 8-WayCrew Cab Crew Cab197.4" Wheelbase	View on Amazon

This table covers the Power Seat switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Power Window Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Popular Fits: all 2021 4500 engines	901873	🇺🇸 US 🇨🇦 CA	Front RightCab & Chassis - Crew Cab	View on Amazon
DORMAN Popular Fits: all 2021 4500 engines	901998	🇺🇸 US 🇨🇦 CA	Front LeftCab & Chassis - Crew Cab Fitment notes — DORMAN 901998 Front LeftCab & Chassis - Crew Cabwithout Power Folding Mirrors	View on Amazon
DORMAN Fits: all 2021 4500 engines	920547	🇺🇸 US 🇨🇦 CA	Front RightCab & Chassis - Conventional	View on Amazon
DORMAN Fits: all 2021 4500 engines	920507	🇺🇸 US 🇨🇦 CA	Fits Rear RightCab & Chassis - Crew Cab Fitment notes — DORMAN 920507 Fits: Rear RightCab & Chassis - Crew Cab or: Rear LeftCab & Chassis - Crew Cab	View on Amazon
DORMAN Fits: all 2021 4500 engines	920502	🇺🇸 US 🇨🇦 CA	Front LeftCab & Chassis - Crew Cab Fitment notes — DORMAN 920502 Front LeftCab & Chassis - Crew Cabwith Power Folding Mirrors	View on Amazon
SKP Fits: all 2021 4500 engines	SKDWS1899	🇺🇸 US 🇨🇦 CA	Front Left	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	DWS1649	🇺🇸 US 🇨🇦 CA	Rearwithout One Touch Window Open/Close	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	DWS1994	🇺🇸 US 🇨🇦 CA	Front Right	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	DWS1899	🇺🇸 US 🇨🇦 CA	Front Leftwithout Power Folding Mirrors Fitment notes — STANDARD MOTOR PRODUCTS DWS1899 Front Leftwithout Power Folding Mirrorswith Auto Down	View on Amazon
WELLS Fits: all 2021 4500 engines	1S14285	🇺🇸 US 🇨🇦 CA	Rear	View on Amazon

This table covers the switches that command each window motor. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Trailer Brake Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 4500 engines	68413389AC	🇺🇸 US 🇨🇦 CA	Trailer Tow Module Fitment notes — MOPAR 68413389AC Trailer Tow Module Fits: Trailer Brake ControlCrew Cab Wheelbase 4or Trailer Brake ControlCrew Cab197.4" Wheelbas or: Trailer Brake ControlRegular Cab Chassis Wheelbase 1or Trailer Brake ControlRegular Cab Chassis Wheelbase 2or Trailer Brake ControlRegular Cab Chassis Wheelbase 3or Trailer Brake ControlRegular Cab Chassis Wheelbase 4	View on Amazon
SKP Fits: all 2021 4500 engines	SKS390	🇺🇸 US 🇨🇦 CA	Switch Only	View on Amazon

This table covers the Trailer Brake switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Turn Signal Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 4500 engines	901279	🇺🇸 US 🇨🇦 CA		View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2021 4500 engines	CBS1925	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the combination / turn-signal switches. Typical signs include a function that works intermittently, or a click without the accessory coming on. Inspect the connector behind the switch; heat-damaged terminals will kill the new part too.

Buying Electrical Switch & Relay Parts for a 2021 Ram 4500

On this vehicle, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches.

Match the engine first. Some electrical switch & relay 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.
Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Power Window Switch and Instrument Cluster Switch .

Frequently Asked Questions

How many electrical switch & relay parts fit the 2021 Ram 4500?

Our catalog currently lists 55 electrical switch & relay parts for the 2021 Ram 4500 across 17 subcategories and 8 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 switch & relay parts differ between 2021 Ram 4500 engines?

Some do. 51 parts fit every engine; the other 4 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 switch & relay problems on a 2021 Ram 4500?

Common symptoms include accessories that work intermittently, a click without action, or one function dead while its fuse tests fine. 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, inspect the connector terminals behind any failed switch — heat damage there will kill the new part too.

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 4500 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 4500?

First match the engine — each row shows which engine(s) the part fits. Then swap a suspect relay with an identical known-good one from the fuse box before buying — it is the fastest diagnostic there is. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2021 Ram 4500

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

Electrical Switch & Relay Parts for Other Ram 4500 Years

2026 Ram 4500 2025 Ram 4500 2024 Ram 4500 2023 Ram 4500 2022 Ram 4500 2020 Ram 4500 2019 Ram 4500 2018 Ram 4500 2017 Ram 4500 2016 Ram 4500 2015 Ram 4500 2014 Ram 4500

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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.

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