2018 Ram 1500 Electrical Switch & Relay Parts: OEM & Replacement (152 Parts)

152 Electrical switch & relay parts are listed for the 2018 Ram 1500, in 40 part types, covering all 3 engine options (3.0L V6 DIESEL Turbocharged, 3.6L V6 and 5.7L V8). Each one has a brand, a manufacturer part number and notes that say where it fits.

On the 2018 Ram 1500, 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 (23 parts), Door Lock Switch (17 parts) and Oil Pressure Sender / Switch (13 parts). The other 37 part types cover the remaining 99 parts.

4WD Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2018 1500 engines	68142281AE	🇺🇸 US 🇨🇦 CA	Fits Electric Shift-On-The-Fly Part-Time Transfer CaseExc. Electronic Shift Fitment notes — MOPAR 68142281AE Fits: Electric Shift-On-The-Fly Part-Time Transfer CaseExc. Electronic ShiftRegular Cab6.5 Foot BedLT. Duty 4WD or: Electric Shift-On-The-Fly Part-Time Transfer CaseExc. Electronic ShiftRegular Cab8 Foot BedLT. Duty 4WD or: Electric Shift-On-The-Fly Part-Time Transfer CaseExc. Electronic ShiftSedan/Quad Cab Short WheelbaseLT. Duty 4WD or: Electric Shift-On-The-Fly Part-Time Transfer CaseExc. Electronic ShiftCrew Cab Wheelbase 2LT. Duty 4WD or: Electric Shift-On-The-Fly Part-Time Transfer CaseExc. Electronic ShiftCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
MOPAR Fits: all 2018 1500 engines	68142277AE	🇺🇸 US 🇨🇦 CA	Fits Elec Shift On Demand Transfer CaseExc. Electronic Shift Fitment notes — MOPAR 68142277AE Fits: Elec Shift On Demand Transfer CaseExc. Electronic ShiftSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Elec Shift On Demand Transfer CaseExc. Electronic ShiftRegular Cab8 Foot BedLt. Duty 4WD or: Elec Shift On Demand Transfer CaseExc. Electronic ShiftRegular Cab6.5 Foot BedLt. Duty 4WD or: Elec Shift On Demand Transfer CaseExc. Electronic ShiftCrew Cab Wheelbase 2LT. Duty 4WD or: Elec Shift On Demand Transfer CaseExc. Electronic ShiftCrew Cab5'7" BoxLT. Duty 4WD	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 Compressor Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332641	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	5-Pin ConnectorColor: Black, Gray Fitment notes — HELLA 933332641 5-Pin ConnectorColor: Black, Gray Clutch Relay	View on Amazon

This table covers the relays that control the A/C Compressor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

A/C Refrigerant Pressure Switch

Brand	Part Number	Markets	Notes	Buy
UAC Popular Fits: all 2018 1500 engines	SW10008C	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Pressure Transducer Fitment notes — UAC SW10008C Pressure Transducer Transducer	View on Amazon
DORMAN Fits: all 2018 1500 engines	904620	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
FACET Fits: all 2018 1500 engines	250074	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
FOUR SEASONS Fits: all 2018 1500 engines	37368	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Pressure Switch Fitment notes — FOUR SEASONS 37368 Pressure Switch Transducer	View on Amazon
WELLS Fits: all 2018 1500 engines	1S15798	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	CUT-OFF	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.

A/C Thermo Switch

Brand	Part Number	Markets	Notes	Buy
GPD Fits: all 2018 1500 engines	1713019	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Evaporator Temperature Sensor45 Degree Angle	View on Amazon

This table covers the A/C Thermo 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.

Accessory Power Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332531	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	4-Pin ConnectorPlug: B Fitment notes — HELLA 933332531 4-Pin ConnectorPlug: BColor: Black	View on Amazon

This table covers the relays that control the Accessory Power circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Adjustable Pedal Switch

Brand	Part Number	Markets	Notes	Buy
WELLS Fits: all 2018 1500 engines	1S16026	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		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.

Blower Motor Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332641	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	5-Pin ConnectorColor: Black, Gray	View on Amazon
ROSTRA Fits: all 2018 1500 engines	600230	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the relays that control the Blower Motor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Brake Light Switch

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2018 1500 engines	920626	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
VEMO Fits: all 2018 1500 engines	V33730040	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Big Horn or Laramie or Laramie Longhorn or Limited or Lone Star or SLT Model or Sport or TradesmanElectric Fitment notes — VEMO V33730040 Big Horn or Laramie or Laramie Longhorn or Limited or Lone Star or SLT Model or Sport or TradesmanElectric7 8700AE Big Horn or Express or Laramie or Lone Star or Rebel or SLT Model or Sport or TradesmanElectric7 8700AE Big Horn or Express or Laramie or Laramie Longhorn or Limited or Lone Star or Rebel or SLT Model or Special Service or Sport or TradesmanElectric7 8700AE	View on Amazon
WELLS Fits: all 2018 1500 engines	1S17828	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Mounting Hardware Included: No	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.

Cruise Control Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Popular Fits: all 2018 1500 engines	601607	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Right4 Button Fitment notes — DORMAN 601607 Right4 Buttonwithout Heated Steering Wheel	View on Amazon
DORMAN Fits: all 2018 1500 engines	601608	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Right6 Button	View on Amazon
VEMO Fits: all 2018 1500 engines	V33800018	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Big Horn or Laramie or Laramie Longhorn or Limited or Lone Star or SLT Model or Sport or Tradesman Fitment notes — VEMO V33800018 Big Horn or Laramie or Laramie Longhorn or Limited or Lone Star or SLT Model or Sport or Tradesman Big Horn or Express or Laramie or Lone Star or Rebel or SLT Model or Sport or Tradesman Big Horn or Express or Laramie or Laramie Longhorn or Limited or Lone Star or Rebel or SLT Model or Special Service or Sport or Tradesman	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	CCA1389	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	without Adaptive Cruise Control	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	CCA1384	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Adaptive Cruise Control	View on Amazon

This table covers the Cruise Control 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.

Defroster Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332641	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	5-Pin ConnectorColor: Black, Gray	View on Amazon

This table covers the relays that control the Defroster circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Dimmer Switch

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	CBS1925	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
WELLS Fits: all 2018 1500 engines	1S11313	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		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

Economy

Brand	Part Number	Markets	Notes	Buy
ULTRA-POWER Popular Fits: all 2018 1500 engines	DWS1900	🇺🇸 US 🇨🇦 CA	Front LeftPower Door Lock Switch Fitment notes — ULTRA-POWER DWS1900 Front LeftPower Door Lock Switchwith PWR Folding Mirror Switch2 DRwith Auto Down	View on Amazon
ULTRA-POWER Fits: all 2018 1500 engines	DWS1993	🇺🇸 US 🇨🇦 CA	RightPower Door Lock Switch Fitment notes — ULTRA-POWER DWS1993 RightPower Door Lock Switch4 DR	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: all 2018 1500 engines	56046826AE	🇺🇸 US 🇨🇦 CA	Fits FrontPower Locks, Power Front Windows, 1-Touch,Up & Down, Power-Folding Mirrors Fitment notes — MOPAR 56046826AE Fits: FrontPower Locks, Power Front Windows, 1-Touch,Up & Down, Power-Folding MirrorsDriver SideRegular Cab8 Foot BedLt. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch,Up & Down, Power-Folding MirrorsDriver SideSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch,Up & Down, Power-Folding MirrorsDriver SideRegular Cab6.5 Foot BedLt. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch, up & Down, Power-Folding MirrorsDriver SideCrew Cab Wheelbase 2LT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch Up & Down, Power-Folding MirrorsDriver SideCrew Cab5'7" Box or: FrontPower Locks, Power Front Windows, 1-Touch,up & Down, Power-Folding MirrorsDriver SideCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
MOPAR Popular Fits: all 2018 1500 engines	56046823AE	🇺🇸 US 🇨🇦 CA	Fits FrontPower Locks, Power Front Windows, 1-Touch, up & Down Fitment notes — MOPAR 56046823AE Fits: FrontPower Locks, Power Front Windows, 1-Touch, up & DownExc. Power-Folding MirrorsDriver SideRegular Cab6.5 Foot BedLT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch, up & DownExc. Power-Folding MirrorsDriver SideRegular Cab8 Foot BedLT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch, up & DownExc. Power-Folding MirrorsDriver SideSedan/Quad Cab Short WheelbaseLT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch, up & DownExc. Power-Folding MirrorsDriver SideCrew Cab Wheelbase 2LT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch Up & DownExc. Power-Folding MirrorsDriver SideCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2018 1500 engines	DWS1647	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Rightwithout Luxury Package Fitment notes — STANDARD MOTOR PRODUCTS DWS1647 Front Rightwithout Luxury Packagewith One Touch Window Open/Close	View on Amazon
MOPAR Fits: all 2018 1500 engines	68148892AB	🇺🇸 US 🇨🇦 CA	Fits FrontPower Locks, Power Windows, Front 1-Touch Down Fitment notes — MOPAR 68148892AB Fits: FrontPower Locks, Power Windows, Front 1-Touch DownPassenger SideRegular Cab8 Foot BedLt. Duty 4WD or: FrontPower Locks, Power Windows, Front 1-Touch DownPassenger SideRegular Cab6.5 Foot BedLt. Duty 4WD	View on Amazon
MOPAR Fits: all 2018 1500 engines	68275823AC	🇺🇸 US 🇨🇦 CA	Fits FrontPower Locks, Power Front Windows, 1-Touch, up & Down Fitment notes — MOPAR 68275823AC Fits: FrontPower Locks, Power Front Windows, 1-Touch, up & DownPassenger SideSedan/Quad Cab Short WheelbaseLT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch, up & DownPassenger SideCrew Cab Wheelbase 2LT. Duty 4WD or: FrontPower Locks, Power Front Windows, 1-Touch Up & DownPassenger SideCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
MOPAR Fits: all 2018 1500 engines	68148893AB	🇺🇸 US 🇨🇦 CA	Fits FrontPower Locks, Power Windows, Front 1-Touch Down Fitment notes — MOPAR 68148893AB Fits: FrontPower Locks, Power Windows, Front 1-Touch DownExc. Power-Folding MirrorsDriver SideRegular Cab6.5 Foot BedLt. Duty 4WD or: FrontPower Locks, Power Windows, Front 1-Touch DownExc. Power-Folding MirrorsDriver SideSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: FrontPower Locks, Power Windows, Front 1-Touch DownExc. Power-Folding MirrorsDriver SideRegular Cab8 Foot BedLt. Duty 4WD or: FrontPower Locks, Power Windows, Front 1-Touch DownExc. Power Folding MirrorsDrivers SideCrew Cab Wheelbase 2LT. Duty 4WD or: FrontPower Locks, Power Windows, Front 1-Touch DownExc. Power-Folding MirrorsDriver SideCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
ROSTRA Fits: all 2018 1500 engines	660748	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Leftwith Power Folding Mirrors Fitment notes — ROSTRA 660748 Front Leftwith Power Folding MirrorsOne Touch Down Control	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1994	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	RightStandard Cab Pickup	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1993	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Attachment Method: Push On Fitment notes — STANDARD MOTOR PRODUCTS DWS1993 Attachment Method: Push On RightCrew Cab Pickup or Extended Cab Pickup	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1899	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftStandard Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1899 Front LeftStandard Cab Pickupwithout Power Folding Mirrorswith Auto Down	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1900	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftStandard Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1900 Front LeftStandard Cab Pickupwith Power Folding Mirrorswith Auto Down	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1897	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1897 Front LeftCrew Cab Pickup or Extended Cab Pickupwithout Power Folding Mirrorswith One-Touch Open/Close Windows	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1898	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1898 Front LeftCrew Cab Pickup or Extended Cab Pickupwith Power Folding Mirrorswith One-Touch Open/Close Windows	View on Amazon
WELLS Fits: all 2018 1500 engines	1S14283	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftStandard Cab Pickup Fitment notes — WELLS 1S14283 Front LeftStandard Cab Pickupwith One-Touch Open/Close Windowswith Power Folding Mirrors	View on Amazon
WELLS Fits: all 2018 1500 engines	1S14262	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — WELLS 1S14262 Front LeftCrew Cab Pickup or Extended Cab Pickupwith One-Touch Open/Close Windowswithout Power Folding Mirrors	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.

Engine Compartment Light Switch

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DS2264	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Alarm System	View on Amazon

This table covers the Engine Compartment Light 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.

Fog / Driving Lamp Relay

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	RY1627	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the relays that control the Fog / Driving Lamp circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Fog / Driving Lamp Switch

Brand	Part Number	Markets	Notes	Buy
WELLS Fits: all 2018 1500 engines	1S13321	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer Fitment notes — WELLS 1S13321 Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer with Cargo Area Light	View on Amazon

This table covers the Fog / Driving 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.

Fuel Door Release Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2018 1500 engines	68067517AA	🇺🇸 US 🇨🇦 CA	Fits Glow In The DarkRam Box Cargo Management System Fitment notes — MOPAR 68067517AA Fits: Glow In The DarkRam Box Cargo Management SystemRemote Keyless EntrySedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Glow In The DarkRam Box Cargo Management SystemRemote Keyless EntryRegular Cab6.5 Foot BedLt. Duty 4WD or: Glow In The DarkRambox Cargo Management SystemRemote Keyless EntryCrew Cab Wheelbase 2LT. Duty 4WD or: Glow In The DarkRambox Cargo Management SystemRemote Keyless EntryCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon

This table covers the Fuel Door Release 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 2018 1500 engines	4565022	🇺🇸 US 🇨🇦 CA	Fits Glove Box LampSedan/Quad Cab Short Wheelbase Fitment notes — MOPAR 4565022 Fits: Glove Box LampSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Glove Box LampRegular Cab, 8 Foot BedLT. Duty 4WD or: Glove Box LampRegular Cab, 6.5 Foot BedLT. Duty 4WD or: Glove Box LampCrew Cab Wheelbase 2LT. Duty 4WD or: Glove Box LampCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
ROSTRA Fits: all 2018 1500 engines	651381	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
WELLS Fits: all 2018 1500 engines	1S2892	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		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 2018 1500 engines	RM1320829	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Fog Lamps	View on Amazon
SKP Fits: all 2018 1500 engines	SKHLS1686	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	without Fog Lights	View on Amazon
SKP Fits: all 2018 1500 engines	SKHLS1685	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Fog Lights	View on Amazon
ULTRA-POWER Fits: all 2018 1500 engines	HLS1686	🇺🇸 US 🇨🇦 CA	without Fog Lights	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
ROSTRA Popular Fits: all 2018 1500 engines	650225	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Fog Lights	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2018 1500 engines	HLS1686	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	without Fog Lights	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2018 1500 engines	HLS1685	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Fog Lights	View on Amazon
MOPAR Fits: all 2018 1500 engines	68269910AA	🇺🇸 US 🇨🇦 CA	Fits Automatic Headlamps, Cargo LampExc. Fog Lamps or LED Fog Lamps Fitment notes — MOPAR 68269910AA Fits: Automatic Headlamps, Cargo LampExc. Fog Lamps or LED Fog LampsCrew Cab Wheelbase 2LT. Duty 4WD or: Automatic Headlamps, Cargo LampExc. Fog Lamps or LED Fog LampsCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Automatic Headlamps, Cargo LampExc. Fog Lamps or LED Fog LampsRegular Cab6.5 Foot BedLT. Duty 4WD or: Automatic Headlamps, Cargo LampExc. Fog Lamps or LED Fog LampsRegular Cab8 Foot BedLT. Duty 4WD or: Automatic Headlamps, Cargo LampExc. Fog Lamps or LED Fog LampsSedan/Quad Cab Short WheelbaseLT. Duty 4WD	View on Amazon
ROSTRA Fits: all 2018 1500 engines	650140	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	without Fog Lights	View on Amazon
WELLS Fits: all 2018 1500 engines	1S13330	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Functions: Headlight, Auto Headlight, Parking Light, Cargo Light, Instrument Panel Dimmer Fitment notes — WELLS 1S13330 Functions: Headlight, Auto Headlight, Parking Light, Cargo Light, Instrument Panel Dimmer without Fog Lights	View on Amazon
WELLS Fits: all 2018 1500 engines	1S13321	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer Fitment notes — WELLS 1S13321 Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer with Fog Lights	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.

Hood Ajar Indicator Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2018 1500 engines	68541273AA	🇺🇸 US 🇨🇦 CA	Fits Stop-Start Multiple VSM SystemSedan/Quad Cab Short Wheelbase Fitment notes — MOPAR 68541273AA Fits: Stop-Start Multiple VSM SystemSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Stop-Start Multiple VSM SystemRegular Cab8 Foot BedLt. Duty 4WD or: Stop-Start Multiple VSM SystemRegular Cab6.5 Foot BedLt. Duty 4WD or: Stop-Start Multiple VSM SystemCrew Cab Wheelbase 2LT. Duty 4WD or: Stop-Start Multiple VSM SystemCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
MOPAR Fits: all 2018 1500 engines	5026211AA	🇺🇸 US 🇨🇦 CA	Fits Stop-Start Multiple VSM SystemSedan/Quad Cab Short Wheelbase Fitment notes — MOPAR 5026211AA Fits: Stop-Start Multiple VSM SystemSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Stop-Start Multiple VSM SystemRegular Cab8 Foot BedLt. Duty 4WD or: Stop-Start Multiple VSM SystemRegular Cab6.5 Foot BedLt. Duty 4WD or: Stop-Start Multiple VSM SystemCrew Cab Wheelbase 2LT. Duty 4WD or: Stop-Start Multiple VSM SystemCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	AW1094	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Alarm System	View on Amazon

This table covers the Hood Ajar Indicator 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.

HVAC Control Switch / Panel

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2018 1500 engines	68268191AA	🇺🇸 US 🇨🇦 CA	Fits A/CExcept 8.4" Touchscreen Display or Exterior Mirrors with Heating Element Fitment notes — MOPAR 68268191AA Fits: A/CExcept 8.4" Touchscreen Display or Exterior Mirrors with Heating Element or: Rear Window DefrosterCrew Cab Wheelbase 2LT. Duty 4WD or: A/CExcept 8.4" Touchscreen Display or Exterior Mirrors with Heating Element or: Rear Window DefrosterRegular Cab8 Foot BedLT. Duty 4WD or: A/CExcept 8.4" Touchscreen Display or Exterior Mirrors with Heating Element or: Rear Window DefrosterCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: A/CExcept 8.4" Touchscreen Display or Exterior Mirrors with Heating Element or: Rear Window DefrosterRegular Cab6.5 Foot BedLT. Duty 4WD or: A/CExcept 8.4" Touchscreen Display or Exterior Mirrors with Heating Element or: Rear Window DefrosterSedan/Quad Cab Short WheelbaseLT. Duty 4WD	View on Amazon
MOPAR Fits: all 2018 1500 engines	68268190AA	🇺🇸 US 🇨🇦 CA	Fits Air Conditioning, Exterior Mirrors with Heating Element Fitment notes — MOPAR 68268190AA Fits: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. 8.4" Touchscreen DisplayCrew Cab Wheelbase 2LT. Duty 4WD or: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. 8.4" Touchscreen DisplayRegular Cab8 Foot BedLT. Duty 4WD or: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. 8.4" Touchscreen DisplayCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. 8.4" Touchscreen DisplayRegular Cab6.5 Foot BedLT. Duty 4WD or: Air Conditioning, Exterior Mirrors with Heating Element or: Rear Window DefrosterExc. 8.4" Touchscreen DisplaySedan/Quad Cab Short WheelbaseLT. Duty 4WD	View on Amazon

This table covers the HVAC Control Switch panels.

Ignition Starter Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2018 1500 engines	601086	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Requires Pin From Original Mfg For Proper Programming	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: all 2018 1500 engines	68271986AC	🇺🇸 US 🇨🇦 CA	Fits Except Pushbutton StartRegular Cab, 6.5 Foot Bed Fitment notes — MOPAR 68271986AC Fits: Except Pushbutton StartRegular Cab, 6.5 Foot BedLT. Duty 4WD or: Except Pushbutton StartRegular Cab, 8 Foot BedLT. Duty 4WD or: Except Pushbutton StartSedan/Quad Cab Short WheelbaseLT. Duty 4WD or: Except Pushbutton StartCrew Cab Wheelbase 2LT. Duty 4WD or: Except Pushbutton StartCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2018 1500 engines	US1292	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	DASH MOUNTED	View on Amazon
MOPAR Fits: all 2018 1500 engines	6CK46DX9AC	🇺🇸 US 🇨🇦 CA	PUSH BUTTON Fitment notes — MOPAR 6CK46DX9AC PUSH BUTTON Fits: Pushbutton StartSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Pushbutton StartRegular Cab, 8 Foot BedLT. Duty 4WD or: Pushbutton StartCrew Cab Wheelbase 2LT. Duty 4WD or: Pushbutton StartCrew Cab5'7" BoxLT. Duty 4WD or: Pushbutton StartRegular Cab, 6.5 Foot BedLT. Duty 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	US1494	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Located On Steering Column	View on Amazon
WELLS Fits: all 2018 1500 engines	1S16362	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		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 2018 1500 engines	68247636AA	🇺🇸 US 🇨🇦 CA	Fits Electronic Stability Control, Heated Front Seats, Heated Steering Wheel, Ventilated Front Seats, Parksense Front/Rear Park Assist SystemExc. Parksense Rear Park Assist System or Load Leveling and Height Control Fitment notes — MOPAR 68247636AA Fits: Electronic Stability Control, Heated Front Seats, Heated Steering Wheel, Ventilated Front Seats, Parksense Front/Rear Park Assist SystemExc. Parksense Rear Park Assist System or Load Leveling and Height ControlCrew Cab Wheelbase 2LT. Duty 4WD or: Electronic Stability Control, Heated Front Seats, Heated Steering Wheel, Ventilated Front Seats, Parksense Front/Rear Park Assist SystemExc. Parksense Rear Park Assist System or Load Leveling and Height ControlCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Electronic Stability Control, Heated Front Seats, Heated Steering Wheel, Ventilated Front Seats, Parksense Front/Rear Park Assist SystemExc. Parksense Rear Park Assist System or Load Leveling and Height ControlRegular Cab6.5 Foot BedLT. Duty 4WD or: Electronic Stability Control, Heated Front Seats, Heated Steering Wheel, Ventilated Front Seats, Parksense Front/Rear Park Assist SystemExc. Parksense Rear Park Assist System or Load Leveling and Height ControlRegular Cab8 F	View on Amazon
MOPAR Fits: all 2018 1500 engines	68247618AA	🇺🇸 US 🇨🇦 CA	Fits Electronic Stability Control, Load Leveling and Height ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front Seats Fitment notes — MOPAR 68247618AA Fits: Electronic Stability Control, Load Leveling and Height ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Wheelbase 2LT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsRegular Cab6.5 Foot BedLT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front	View on Amazon
MOPAR Fits: all 2018 1500 engines	68247619AA	🇺🇸 US 🇨🇦 CA	Fits Electronic Stability Control, Load Leveling and Height Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front Seats Fitment notes — MOPAR 68247619AA Fits: Electronic Stability Control, Load Leveling and Height Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Wheelbase 2LT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsRegular Cab6.5 Foot BedLT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Heated Front Seats or Heated Steering Wheel or Ventilated Front Seats	View on Amazon
MOPAR Fits: all 2018 1500 engines	68247620AA	🇺🇸 US 🇨🇦 CA	Fits Electronic Stability ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front Seats Fitment notes — MOPAR 68247620AA Fits: Electronic Stability ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Electronic Stability ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Wheelbase 2LT. Duty 4WD or: Electronic Stability ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsRegular Cab6.5 Foot BedLT. Duty 4WD or: Electronic Stability ControlExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilat	View on Amazon
MOPAR Fits: all 2018 1500 engines	68247621AA	🇺🇸 US 🇨🇦 CA	Fits Electronic Stability Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front Seats Fitment notes — MOPAR 68247621AA Fits: Electronic Stability Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Wheelbase 2LT. Duty 4WD or: Electronic Stability Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Electronic Stability Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front SeatsRegular Cab6.5 Foot BedLT. Duty 4WD or: Electronic Stability Control, Parksense Rear Park Assist SystemExc. Parksense Front/Rear Park Assist System or Load Leveling and Height Control or Heated Front Seats or Heated Steering Wheel or Ventilated Front	View on Amazon
MOPAR Fits: all 2018 1500 engines	68247623AA	🇺🇸 US 🇨🇦 CA	Fits Electronic Stability Control, Load Leveling and Height Control, Heated Front Seats, Heated Steering WheelExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Ventilated Front Seats Fitment notes — MOPAR 68247623AA Fits: Electronic Stability Control, Load Leveling and Height Control, Heated Front Seats, Heated Steering WheelExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Ventilated Front SeatsCrew Cab Wheelbase 2LT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height Control, Heated Front Seats, Heated Steering WheelExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Ventilated Front SeatsCrew Cab Crew Cab5'7" BoxLT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height Control, Heated Front Seats, Heated Steering WheelExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Ventilated Front SeatsRegular Cab6.5 Foot BedLT. Duty 4WD or: Electronic Stability Control, Load Leveling and Height Control, Heated Front Seats, Heated Steering WheelExc. Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System or Ventilated Front SeatsRegular	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.

Instrument Panel Dimmer Switch

Brand	Part Number	Markets	Notes	Buy
WELLS Fits: all 2018 1500 engines	1S13321	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer Fitment notes — WELLS 1S13321 Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer with Fog Lightswith Cargo Area Light	View on Amazon

This table covers the Instrument Panel Dimmer 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.

Micro Plug Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332641	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	5-Pin ConnectorColor: Black, Gray	View on Amazon

This table covers the relays that control the Micro Plug circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Multi-Function Relay

Brand	Part Number	Markets	Notes	Buy
WELLS Fits: all 2018 1500 engines	1R1061	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Amperage Rating: 40 AConnector Gender: Male Fitment notes — WELLS 1R1061 Amperage Rating: 40 AConnector Gender: MaleCover Material: PlasticMounting Bracket Included: NoMounting Hardware Included: NoTerminal Quantity: 5Terminal Type: Blade with Stamping # 4727370AA or # 4692033AA	View on Amazon
WELLS Fits: all 2018 1500 engines	1R2407	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Mounting Hardware Included: No Fitment notes — WELLS 1R2407 Mounting Hardware Included: No with Stamping # G8HE-1A7T-R1-DC12 or # 871E-1A-D-R1	View on Amazon
WELLS Fits: all 2018 1500 engines	1R2491	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Stamping # 13742705 or # 4671886AA	View on Amazon

This table covers the relays that control the Multi-Function circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Oil Pressure Sender / Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Popular Fits: 3.6L V6, 5.7L V8	926337	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
UNITED MOTOR PRODUCTS Fits: 3.0L V6 DIESEL Turbocharged	OPS315	🇺🇸 US 🇨🇦 CA	with Light	View on Amazon
UNITED MOTOR PRODUCTS Fits: 3.6L V6, 5.7L V8	OPS348	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Gauge	View on Amazon
VEMO Fits: 3.0L V6 DIESEL Turbocharged	V33730033	🇺🇸 US 🇨🇦 CA		View on Amazon
WALKER PRODUCTS Fits: 3.0L V6 DIESEL Turbocharged	2561084	🇺🇸 US 🇨🇦 CA		View on Amazon
WALKER PRODUCTS Fits: 3.6L V6, 5.7L V8	2561030	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Connector Gender: Female	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
MOPAR Popular Fits: 3.0L V6 DIESEL Turbocharged	68329323AA	🇺🇸 US 🇨🇦 CA	Fits 50 State EmissionsSedan/Quad Cab Short Wheelbase Fitment notes — MOPAR 68329323AA Fits: 50 State EmissionsSedan/Quad Cab Short WheelbaseLt. Duty 4WD or: 50 State EmissionsRegular Cab6.5 Foot BedLt. Duty 4WD or: 50 State EmissionsRegular Cab8 Foot BedLt. Duty 4WD or: 50 State EmissionsCrew Cab Wheelbase 2LT. Duty 4WD or: 50 State EmissionsCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: 3.0L V6 DIESEL Turbocharged	PS639	🇺🇸 US 🇨🇦 CA	Terminal Type: Pin Fitment notes — STANDARD MOTOR PRODUCTS PS639 Terminal Type: Pin with Light	View on Amazon
WELLS Popular Fits: 3.6L V6, 5.7L V8	1S14330	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
ROSTRA Fits: 3.0L V6 DIESEL Turbocharged	501550	🇺🇸 US 🇨🇦 CA		View on Amazon
ROSTRA Fits: 3.6L V6, 5.7L V8	501563	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Big Horn or Express or Laramie or Lone Star or Outdoorsman or Rebel or SLT Model or ST Model or SXT Model or Sport or Tradesman Fitment notes — ROSTRA 501563 Big Horn or Express or Laramie or Lone Star or Outdoorsman or Rebel or SLT Model or ST Model or SXT Model or Sport or Tradesman Big Horn or Express or Laramie or Laramie Limited or Laramie Longhorn or Limited or Lone Star or Outdoorsman or Rebel or SLT Model or ST Model or SXT Model or Special Service or Sport or Tradesman	View on Amazon
STANDARD MOTOR PRODUCTS Fits: 3.6L V6, 5.7L V8	PS674	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Terminal Type: Blade Fitment notes — STANDARD MOTOR PRODUCTS PS674 Terminal Type: Blade with Gauge	View on Amazon
WELLS Fits: 3.0L V6 DIESEL Turbocharged	1S12822	🇺🇸 US 🇨🇦 CA		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.

Outside Mirror Switch

Economy

Brand	Part Number	Markets	Notes	Buy
ULTRA-POWER Fits: all 2018 1500 engines	DWS1897	🇺🇸 US 🇨🇦 CA	Remotewithout Power Folding Mirror Switch Fitment notes — ULTRA-POWER DWS1897 Remotewithout Power Folding Mirror Switchwith Auto Up/Down4 DR	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1899	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Standard Cab Pickupwithout Power Folding Mirrors Fitment notes — STANDARD MOTOR PRODUCTS DWS1899 Standard Cab Pickupwithout Power Folding Mirrorswith Auto Down	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1897	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Crew Cab Pickup or Extended Cab Pickupwithout Power Folding Mirrors Fitment notes — STANDARD MOTOR PRODUCTS DWS1897 Crew Cab Pickup or Extended Cab Pickupwithout Power Folding Mirrorswith One-Touch Open/Close Windows	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1898	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Crew Cab Pickup or Extended Cab Pickupwith Power Folding Mirrors Fitment notes — STANDARD MOTOR PRODUCTS DWS1898 Crew Cab Pickup or Extended Cab Pickupwith Power Folding Mirrorswith One-Touch Open/Close Windows	View on Amazon

This table covers the Outside Mirror 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.

Oxygen (O2) Sensor Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332641	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	5-Pin ConnectorColor: Black, Gray Fitment notes — HELLA 933332641 5-Pin ConnectorColor: Black, Gray Heater Relay	View on Amazon

This table covers the relays that control the Oxygen (O2) Sensor circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Parking Brake Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2018 1500 engines	4221463	🇺🇸 US 🇨🇦 CA	Fits Sedan/Quad Cab Short WheelbaseLt. Duty 4WD Fitment notes — MOPAR 4221463 Fits: Sedan/Quad Cab Short WheelbaseLt. Duty 4WD or: Regular Cab8 Foot BedLt. Duty 4WD or: Regular Cab6.5 Foot BedLt. Duty 4WD or: Crew Cab Wheelbase 2LT. Duty 4WD or: Crew Cab5'7" BoxLT. Duty 4WD	View on Amazon
WELLS Fits: all 2018 1500 engines	1S4788	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the Parking 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.

Power Seat Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2018 1500 engines	901477	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Left8 Way Fitment notes — DORMAN 901477 Front Left8 WayHigh Current	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	PMS12	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Adjusts Seat Memory Function	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	PSW126	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Left	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	PSW127	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Leftwith Memory Seats	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 2018 1500 engines	920541	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front RightCrew Cab Pickup or Extended Cab Pickup	View on Amazon
DORMAN Popular Fits: all 2018 1500 engines	901989	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — DORMAN 901989 Front LeftCrew Cab Pickup or Extended Cab Pickupwith One Touch Up and Downwithout Power Folding Mirrors	View on Amazon
DORMAN Popular Fits: all 2018 1500 engines	901466	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — DORMAN 901466 Front LeftCrew Cab Pickup or Extended Cab Pickup11 Buttonwith One Touch Up and Downwith Power Folding Mirrors	View on Amazon
DORMAN Fits: all 2018 1500 engines	920508	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Fits Rear LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — DORMAN 920508 Fits: Rear LeftCrew Cab Pickup or Extended Cab Pickup or: Rear RightCrew Cab Pickup or Extended Cab Pickup	View on Amazon
SHEE-MAR Fits: all 2018 1500 engines	SM1898	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Leftwith Power Folding Mirrors Fitment notes — SHEE-MAR SM1898 Front Leftwith Power Folding Mirrorswith One Touch up Down	View on Amazon
SKP Fits: all 2018 1500 engines	SKDWS1899	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Left	View on Amazon
ULTRA-POWER Fits: all 2018 1500 engines	DWS1993	🇺🇸 US 🇨🇦 CA	Front Right4 DR	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Popular Fits: all 2018 1500 engines	DWS1994	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front RightStandard Cab Pickup	View on Amazon
STANDARD MOTOR PRODUCTS Popular Fits: all 2018 1500 engines	DWS1899	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftStandard Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1899 Front LeftStandard Cab Pickupwithout Power Folding Mirrorswith Auto Down	View on Amazon
MOPAR Fits: all 2018 1500 engines	56046832AC	🇺🇸 US 🇨🇦 CA	Fits Rear LeftPower Front Windows, 1-Touch Up and Down Fitment notes — MOPAR 56046832AC Fits: Rear LeftPower Front Windows, 1-Touch Up and DownSedan/Quad Cab Short WheelbaseLT. Duty 4WD or: Rear RightPower Front Windows, 1-Touch Up and DownSedan/Quad Cab Short WheelbaseLT. Duty 4WD or: Rear LeftPower Front Windows, 1-Touch Up and DownCrew Cab Wheelbase 2LT. Duty 4WD or: Rear RightPower Front Windows, 1-Touch Up and DownCrew Cab Wheelbase 2LT. Duty 4WD or: Rear LeftPower Front Windows, 1-Touch Up and DownCrew Cab5'7" BoxLT. Duty 4WD or: Rear RightPower Front Windows, 1-Touch Up and DownCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
ROSTRA Fits: all 2018 1500 engines	660175	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear	View on Amazon
ROSTRA Fits: all 2018 1500 engines	660748	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Leftwith Power Folding Mirrors Fitment notes — ROSTRA 660748 Front Leftwith Power Folding MirrorsOne Touch Down Control	View on Amazon
ROSTRA Fits: all 2018 1500 engines	660169	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Leftwithout Power Folding Mirrors Fitment notes — ROSTRA 660169 Front Leftwithout Power Folding MirrorsOne Touch Down Control	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1993	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Attachment Method: Push On Fitment notes — STANDARD MOTOR PRODUCTS DWS1993 Attachment Method: Push On Front RightCrew Cab Pickup or Extended Cab Pickup	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1897	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1897 Front LeftCrew Cab Pickup or Extended Cab Pickupwithout Power Folding Mirrorswith One-Touch Open/Close Windows	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DWS1898	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — STANDARD MOTOR PRODUCTS DWS1898 Front LeftCrew Cab Pickup or Extended Cab Pickupwith Power Folding Mirrorswith One-Touch Open/Close Windows	View on Amazon
WELLS Fits: all 2018 1500 engines	1S12999	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Fits Rear LeftExtended Cab Pickup Fitment notes — WELLS 1S12999 Fits: Rear LeftExtended Cab Pickup or: Rear RightExtended Cab Pickup	View on Amazon
WELLS Fits: all 2018 1500 engines	1S15516	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Rightwith One-Touch Open/Close Windows	View on Amazon
WELLS Fits: all 2018 1500 engines	1S14282	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftStandard Cab Pickup Fitment notes — WELLS 1S14282 Front LeftStandard Cab Pickupwith One-Touch Open/Close Windowswithout Power Folding Mirrors	View on Amazon
WELLS Fits: all 2018 1500 engines	1S14283	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftStandard Cab Pickup Fitment notes — WELLS 1S14283 Front LeftStandard Cab Pickupwith One-Touch Open/Close Windowswith Power Folding Mirrors	View on Amazon
WELLS Fits: all 2018 1500 engines	1S14262	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — WELLS 1S14262 Front LeftCrew Cab Pickup or Extended Cab Pickupwith One-Touch Open/Close Windowswithout Power Folding Mirrors	View on Amazon
WELLS Fits: all 2018 1500 engines	1S14257	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front LeftCrew Cab Pickup or Extended Cab Pickup Fitment notes — WELLS 1S14257 Front LeftCrew Cab Pickup or Extended Cab Pickupwith One-Touch Open/Close Windowswith Power Folding Mirrors	View on Amazon

Brand	Part Number	Markets	Notes	Buy
AUTOTECNICA Fits: all 2018 1500 engines	CY1322699	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Left	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.

Radiator Fan Relay

Brand	Part Number	Markets	Notes	Buy
HELLA Fits: all 2018 1500 engines	933332641	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	5-Pin ConnectorColor: Black, Gray Fitment notes — HELLA 933332641 5-Pin ConnectorColor: Black, Gray Motor Relay	View on Amazon

This table covers the relays that control the Radiator Fan circuit. Typical signs include a click with no action, or a circuit that works only when you swap in a known-good relay. Swap with an identical relay in the fuse box before buying — it is the fastest test there is.

Seat Heater Switch

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	HSS124	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear Left	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	HSS120	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear Right	View on Amazon
WELLS Fits: all 2018 1500 engines	1S17438	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear Left	View on Amazon
WELLS Fits: all 2018 1500 engines	1S17439	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Rear Right	View on Amazon

This table covers the Seat Heater 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.

Seat Lumbar Switch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2018 1500 engines	68157564AA	🇺🇸 US 🇨🇦 CA	Driver SideCrew Cab Fitment notes — MOPAR 68157564AA Driver SideCrew Cab5'7" BoxLT. Duty 4WD	View on Amazon
MOPAR Fits: all 2018 1500 engines	68269185AA	🇺🇸 US 🇨🇦 CA	Passenger SideCrew Cab Crew Cab Fitment notes — MOPAR 68269185AA Passenger SideCrew Cab Crew Cab5'7" BoxLT. Duty 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	PSW165	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Front Right	View on Amazon

This table covers the Seat Lumbar 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.

Sunroof / Sunshade Switch

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	DS3500	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
WELLS Fits: all 2018 1500 engines	1S16033	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the Sunroof / Sunshade 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.

Trailer Brake Switch

Brand	Part Number	Markets	Notes	Buy
SHEE-MAR Popular Fits: all 2018 1500 engines	SM1902	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	with Trailer Tow RelayNOT for Add-On	View on Amazon
AUTOTECNICA Fits: all 2018 1500 engines	RM0222121	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
DORMAN Fits: all 2018 1500 engines	601235	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Switch Only	View on Amazon
SKP Fits: all 2018 1500 engines	SK959A01	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Switch Only	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	TBM007	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		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.

Transmission-Automatic Fluid Pressure Switch

Brand	Part Number	Markets	Notes	Buy
VEMO Fits: 5.7L V8	V33770047	🇺🇸 US 🇨🇦 CA	6 speed trans.	View on Amazon

This table covers the Transmission-Automatic Fluid Pressure 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.

Trunk / Cargo Area Lamp Switch

Brand	Part Number	Markets	Notes	Buy
WELLS Fits: all 2018 1500 engines	1S13321	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer Fitment notes — WELLS 1S13321 Functions: Headlight, Auto Headlight, Parking Light, Fog Light, Cargo Light, Instrument Panel Dimmer with Fog Lights	View on Amazon

This table covers the Trunk / Cargo Area 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.

Turn Signal Switch

Economy

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2018 1500 engines	901279	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
VEMO Fits: all 2018 1500 engines	V33730055	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Big Horn or HFE Model or Laramie or Laramie Limited or Laramie Longhorn or Limited or Lone Star or Outdoorsman or SLT Model or ST Model or Sport or Tradesman Fitment notes — VEMO V33730055 Big Horn or HFE Model or Laramie or Laramie Limited or Laramie Longhorn or Limited or Lone Star or Outdoorsman or SLT Model or ST Model or Sport or Tradesman Big Horn or Express or Laramie or Lone Star or Outdoorsman or Rebel or SLT Model or ST Model or SXT Model or Sport or Tradesman Big Horn or Express or Laramie or Laramie Limited or Laramie Longhorn or Limited or Lone Star or Outdoorsman or Rebel or SLT Model or ST Model or SXT Model or Special Service or Sport or Tradesman	View on Amazon
VEMO Fits: all 2018 1500 engines	V33730073	🇺🇸 US 🇨🇦 CA 🇲🇽 MX	Big Horn or Laramie or Laramie Longhorn or Limited or Lone Star or SLT Model or Sport or Tradesman Fitment notes — VEMO V33730073 Big Horn or Laramie or Laramie Longhorn or Limited or Lone Star or SLT Model or Sport or Tradesman Big Horn or Express or Laramie or Lone Star or Rebel or SLT Model or Sport or Tradesman Big Horn or Express or Laramie or Laramie Longhorn or Limited or Lone Star or Rebel or SLT Model or Special Service or Sport or Tradesman	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
WELLS Popular Fits: all 2018 1500 engines	1S11313	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	CBS1925	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		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.

Wiper / Washer Switch

Brand	Part Number	Markets	Notes	Buy
STANDARD MOTOR PRODUCTS Fits: all 2018 1500 engines	CBS1925	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon
WELLS Fits: all 2018 1500 engines	1S11313	🇺🇸 US 🇨🇦 CA 🇲🇽 MX		View on Amazon

This table covers the Wiper / Washer 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 2018 Ram 1500

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 Door Lock Switch .

Frequently Asked Questions

How many electrical switch & relay parts fit the 2018 Ram 1500?

Our catalog currently lists 152 electrical switch & relay parts for the 2018 Ram 1500 across 40 subcategories and 17 brands, covering all 3 engine options (3.0L V6 DIESEL Turbocharged, 3.6L V6 and 5.7L V8). Each part is matched to the engine(s) it fits.

Do electrical switch & relay parts differ between 2018 Ram 1500 engines?

Some do. 138 parts fit every engine; the other 14 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 2018 Ram 1500?

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 2018 Ram 1500 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 2018 Ram 1500?

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 2018 Ram 1500

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 1500 Years

2026 Ram 1500 2025 Ram 1500 2024 Ram 1500 2023 Ram 1500 2022 Ram 1500 2021 Ram 1500 2020 Ram 1500 2019 Ram 1500 2017 Ram 1500 2016 Ram 1500 2015 Ram 1500 2014 Ram 1500

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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