108 Electrical switch & relay parts are listed for the 2018 Ram 4500, in 28 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 2018 Ram 4500, the switch and relay system covers the switches, relays and flashers that route power to everything the driver touches. 37 parts of the 108 listed are Power Window Switch (18 parts), Door Lock Switch (11 parts) and Headlamp Switch (8 parts). The other 25 part types cover the remaining 71 parts.
The 2018 Ram 4500 was sold with both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2018 Ram 4500 electrical switch & relay parts are MOPAR (29 parts), STANDARD MOTOR PRODUCTS (24 parts) and WELLS (21 parts), plus 11 more brands. Quality grades include Standard Replacement and Economy.
17 parts on this 2018 Ram 4500 page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including MOPAR 68148892AB (Door Lock Switch) and SKP SKHLS1685 (Headlamp Switch). Click any part number to see every vehicle that part fits.
4WD Indicator Light Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | TCA64 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the 4WD Indicator 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.
One part is listed for the 2018 Ram 4500 — STANDARD MOTOR PRODUCTS TCA64.
4WD Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 68142281AE | 🇺🇸 US 🇨🇦 CA | Fits Electric Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 4or Electric Shift-On-The-Fly Transfer Case | 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.
This group shows a single part: MOPAR 68142281AE.
A/C Refrigerant Pressure Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 904620 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 6.4L V8 | 1S15798 | 🇺🇸 US 🇨🇦 CA | 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.
2 A/C Refrigerant Pressure Switch parts for the 2018 Ram 4500 come from 2 brands — DORMAN and WELLS.
This group includes DORMAN 904620 and WELLS 1S15798.
A/C Thermo Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 6.4L V8 | 1713019 | 🇺🇸 US 🇨🇦 CA | 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.
One part is listed for the 2018 Ram 4500 — GPD 1713019.
Adjustable Pedal Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 56046113AA | 🇺🇸 US 🇨🇦 CA | Fits Power Adjustable Pedals with Memory or Power Adjustable PedalsExc. Heated Steering Wheel | 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.
This group shows a single part: MOPAR 56046113AA.
Brake Light Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 901259 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UNITED MOTOR PRODUCTS Fits: 6.4L V8 | SW403 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VEMO Fits: 6.4L V8 | V33730040 | 🇺🇸 US 🇨🇦 CA | Electric7 8700AE | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S17828 | 🇺🇸 US 🇨🇦 CA | 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.
4 Brake Light Switch parts for the 2018 Ram 4500 come from 4 brands — DORMAN, UNITED MOTOR PRODUCTS, VEMO and 1 other brand.
The Economy section lists 1 option from DORMAN — the catalog's value-priced group. DORMAN 901259 is listed in this group.
In the Standard Replacement grade, UNITED MOTOR PRODUCTS supplies 1 part: built to original-equipment specification. A representative part number is UNITED MOTOR PRODUCTS SW403.
2 further parts sit outside the graded sections, with the same engine-level match.
This group includes DORMAN 901259, UNITED MOTOR PRODUCTS SW403 and VEMO V33730040 and the remaining parts above.
Cruise Control Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 601607 | 🇺🇸 US 🇨🇦 CA | Right4 Button | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 6.4L V8 | 1S11775 | 🇺🇸 US 🇨🇦 CA | 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.
2 Cruise Control Switch parts are listed for the 2018 Ram 4500, from DORMAN and WELLS.
Economy: 1 part, from DORMAN. A representative part number is DORMAN 601607.
The Standard Replacement section: 1 option from WELLS. WELLS 1S11775 is listed in this group.
Part numbers include DORMAN 601607 and WELLS 1S11775.
Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | 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.
One part is listed for the 2018 Ram 4500 — STANDARD MOTOR PRODUCTS CBS1925.
Door Lock Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER Fits: 6.4L V8 | DWS1993 | 🇺🇸 US 🇨🇦 CA | RightPower Door Lock Switch | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Popular Fits: 6.4L V8 | 68148892AB | 🇺🇸 US 🇨🇦 CA | Fits FrontPower Locks, Power Windows, Front 1-Touch Down | View on Amazon |
| MOPAR Popular Fits: 6.4L V8 | 68148893AB | 🇺🇸 US 🇨🇦 CA | Fits FrontPower Locks, Power Windows, Front 1-Touch Down | View on Amazon |
| MOPAR Popular Fits: 6.4L V8 | 56046823AE | 🇺🇸 US 🇨🇦 CA | Fits FrontPower Locks, Power Front Windows, 1-Touch Up & Down | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68275823AC | 🇺🇸 US 🇨🇦 CA | Fits FrontPower Locks, Power Front Windows, 1-Touch Up & Down | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 660748 | 🇺🇸 US 🇨🇦 CA | Front Leftwith Power Folding Mirrors | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1994 | 🇺🇸 US 🇨🇦 CA | RightCab & Chassis - Conventional | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1993 | 🇺🇸 US 🇨🇦 CA | Attachment Method: Push On | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1899 | 🇺🇸 US 🇨🇦 CA | Front LeftCab & Chassis - Conventional | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1897 | 🇺🇸 US 🇨🇦 CA | Front LeftCab & Chassis - Crew Cab | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S14283 | 🇺🇸 US 🇨🇦 CA | Front Leftwith One-Touch Open/Close Windows | 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.
11 Door Lock Switch parts for the 2018 Ram 4500 come from 5 brands — MOPAR, STANDARD MOTOR PRODUCTS, ULTRA-POWER and 2 other brands. The "Popular" part is MOPAR 68148892AB.
The Economy section: 1 option from ULTRA-POWER. ULTRA-POWER DWS1993 is listed in this group.
Standard Replacement: 10 parts, from MOPAR, STANDARD MOTOR PRODUCTS, ROSTRA and 1 other brand. A representative part number is MOPAR 68148892AB.
Glove Box Lamp Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 4565022 | 🇺🇸 US 🇨🇦 CA | Fits Glove Box LampCrew Cab | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 651381 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 6.4L V8 | 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.
3 Glove Box Lamp Switch parts are listed for the 2018 Ram 4500, from MOPAR, ROSTRA and WELLS.
Part numbers include MOPAR 4565022, ROSTRA 651381 and WELLS 1S2892.
Headlamp Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Popular Fits: 6.4L V8 | SKHLS1685 | 🇺🇸 US 🇨🇦 CA | with Cargo Area Lightwith Fog Lights | View on Amazon |
| AUTOTECNICA Fits: 6.4L V8 | RM1320829 | 🇺🇸 US 🇨🇦 CA | Fog Lamps | View on Amazon |
| ULTRA-POWER Fits: 6.4L V8 | HLS1734 | 🇺🇸 US 🇨🇦 CA | without Cargo Area Lightwith Fog Lights | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 6.4L V8 | HLS1685 | 🇺🇸 US 🇨🇦 CA | with Fog Lightswith Cargo Area Light | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68269910AA | 🇺🇸 US 🇨🇦 CA | Fits Automatic Headlamps, Cargo LampExc. Fog Lamps | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 651216 | 🇺🇸 US 🇨🇦 CA | with Automatic Headlightswithout Fog Lights | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | HLS1734 | 🇺🇸 US 🇨🇦 CA | without Cargo Area Lightwith Fog Lights | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | HLS1746 | 🇺🇸 US 🇨🇦 CA | without Fog Lightswithout Cargo Area Light | 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.
8 Headlamp Switch parts are listed for the 2018 Ram 4500, from STANDARD MOTOR PRODUCTS, SKP, AUTOTECNICA and 3 other brands. SKP SKHLS1685 carries the "Popular" badge.
Economy: 3 parts, from SKP, AUTOTECNICA and ULTRA-POWER. A representative part number is SKP SKHLS1685.
The Standard Replacement section: 5 options from STANDARD MOTOR PRODUCTS, MOPAR and ROSTRA. STANDARD MOTOR PRODUCTS HLS1685 is listed in this group.
Listed part numbers: SKP SKHLS1685, AUTOTECNICA RM1320829 and ULTRA-POWER HLS1734, plus the other parts above.
HVAC Control Switch / Panel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Popular Fits: 6.4L V8 | 68268188AA | 🇺🇸 US 🇨🇦 CA | Fits A/CExcept Rear Window Defroster or Exterior Mirrors with Heating Element or 8.4" Touchscreen Display or Ambulance Prep Group | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68268191AA | 🇺🇸 US 🇨🇦 CA | Fits A/C, Ambulance Prep GroupExc. Rear Window Defroster or Exterior Mirrors with Heating Element or 8.4" Touchscreen Display | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68268190AA | 🇺🇸 US 🇨🇦 CA | Fits A/C, Ambulance Prep GroupRear Window Defroster or Exterior Mirrors with Heating Element | View on Amazon |
| MOPAR Fits: 6.4L V8 | 1UJ97DX9AK | 🇺🇸 US 🇨🇦 CA | Upper | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68268189AA | 🇺🇸 US 🇨🇦 CA | Fits A/CRear Window Defroster or Exterior Mirrors with Heating Element | View on Amazon |
This table covers the HVAC Control Switch panels.
MOPAR supplies the 5 HVAC Control Switch / Panel parts for the 2018 Ram 4500. MOPAR 68268188AA carries the "Popular" badge.
Part numbers include MOPAR 68268188AA, MOPAR 68268191AA and MOPAR 68268190AA, among others listed above.
Ignition Starter Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 601086 | 🇺🇸 US 🇨🇦 CA | Requires Pin From Original Mfg For Proper Programming | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Popular Fits: 6.4L V8 | 68271986AC | 🇺🇸 US 🇨🇦 CA | Fits Except Pushbutton StartRegular Cab Chassis Wheelbase 4or Except Pushbutton Start | View on Amazon |
| MOPAR Fits: 6.4L V8 | 6CK46DX9AC | 🇺🇸 US 🇨🇦 CA | PUSH BUTTON | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | US1292 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 6.4L V8 | 1S16362 | 🇺🇸 US 🇨🇦 CA | 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.
5 Ignition Starter Switch parts are listed for the 2018 Ram 4500, from MOPAR, DORMAN, STANDARD MOTOR PRODUCTS and 1 other brand. MOPAR 68271986AC carries the "Popular" badge.
Economy: 1 part, from DORMAN. A representative part number is DORMAN 601086.
The Standard Replacement section: 4 options from MOPAR, STANDARD MOTOR PRODUCTS and WELLS. MOPAR 68271986AC is listed in this group.
This group includes MOPAR 68271986AC, DORMAN 601086 and MOPAR 6CK46DX9AC and the remaining parts above.
Instrument Cluster Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Popular Fits: 6.4L V8 | 68231814AD | 🇺🇸 US 🇨🇦 CA | Fits Electronic Stability Control, Black Switches, Diesel Exhaust BrakeExc. Power Take Off Prep or Power Take Off Prep - Left Side or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68231813AD | 🇺🇸 US 🇨🇦 CA | Fits Electronic Stability Control, Black Switches, Diesel Exhaust BrakeExc. Power Take Off Prep or Power Take Off Prep - Left Side or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68231817AD | 🇺🇸 US 🇨🇦 CA | Fits Electronic Stability Control, Power Take Off Prep - Left Side, Black Switches, Diesel Exhaust BrakeExc. Power Take Off Prep or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68231818AD | 🇺🇸 US 🇨🇦 CA | Fits Electronic Stability Control, Power Take Off Prep - Left Side, Black Switches, Diesel Exhaust BrakeExc. Power Take Off Prep or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68231819AD | 🇺🇸 US 🇨🇦 CA | Fits Electronic Stability Control, Black SwitchesExc. Power Take Off Prep or Diesel Exhaust Brake or Power Take Off Prep - Left Side or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68231821AD | 🇺🇸 US 🇨🇦 CA | Fits Electronic Stability Control, Black Switches, Power Take Off Prep - Left SideExc. Diesel Exhaust Brake or Power Take Off Prep or Parksense Rear Park Assist System or Parksense Front/Rear Park Assist System | 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.
6 Instrument Cluster Switch parts for the 2018 Ram 4500 come from MOPAR. The "Popular" part is MOPAR 68231814AD.
Part numbers include MOPAR 68231814AD, MOPAR 68231813AD and MOPAR 68231817AD, among others listed above.
Instrument Panel Dimmer Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA Fits: 6.4L V8 | 651216 | 🇺🇸 US 🇨🇦 CA | with Automatic Headlightswithout Fog Lights | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S13323 | 🇺🇸 US 🇨🇦 CA | Functions: Headlight, Auto Headlight, Parking Light, Instrument Panel Dimmer | 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.
2 Instrument Panel Dimmer Switch parts for the 2018 Ram 4500 come from 2 brands — ROSTRA and WELLS.
Part numbers include ROSTRA 651216 and WELLS 1S13323.
Multi-Function Relay
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 6.4L V8 | 1R1061 | 🇺🇸 US 🇨🇦 CA | Amperage Rating: 40 AConnector Gender: Male | View on Amazon |
| WELLS Fits: 6.4L V8 | 1R2407 | 🇺🇸 US 🇨🇦 CA | Mounting Hardware Included: No | View on Amazon |
| WELLS Fits: 6.4L V8 | 1R2491 | 🇺🇸 US 🇨🇦 CA | 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.
3 Multi-Function Relay parts for the 2018 Ram 4500 come from WELLS.
Part numbers include WELLS 1R1061, WELLS 1R2407 and WELLS 1R2491.
Neutral Safety Switch / Range Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 68224233AA | 🇺🇸 US 🇨🇦 CA | Fits Heavy Duty HEMI MDS EngineExc. Power Take Off Prep - Left Side | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | NS744 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: 6.4L V8 | 1S16355 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the Neutral Safety Switch / Range sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors.
3 Neutral Safety Switch / Range Sensor parts for the 2018 Ram 4500 come from 3 brands — MOPAR, STANDARD MOTOR PRODUCTS and WELLS.
Part numbers include MOPAR 68224233AA, STANDARD MOTOR PRODUCTS NS744 and WELLS 1S16355.
Oil Pressure Sender / Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: 6.4L V8 | 926337 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| UNITED MOTOR PRODUCTS Fits: 6.4L V8 | OPS348 | 🇺🇸 US 🇨🇦 CA | with Gauge | View on Amazon |
| WALKER PRODUCTS Fits: 6.4L V8 | 2561030 | 🇺🇸 US 🇨🇦 CA | Connector Gender: Female | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Popular Fits: 6.4L V8 | 1S14330 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| MOPAR Fits: 6.4L V8 | 68019700AA | 🇺🇸 US 🇨🇦 CA | Fits Heavy Duty HEMI MDS Engine.Power Take Off Prep - Left Side | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 501563 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | PS674 | 🇺🇸 US 🇨🇦 CA | Terminal Type: Blade | 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.
7 Oil Pressure Sender / Switch parts for the 2018 Ram 4500 come from 7 brands — DORMAN, UNITED MOTOR PRODUCTS, WALKER PRODUCTS and 4 other brands. The "Popular" part is DORMAN 926337.
The Economy section: 3 options from DORMAN, UNITED MOTOR PRODUCTS and WALKER PRODUCTS. DORMAN 926337 is listed in this group.
Standard Replacement: 4 parts, from WELLS, MOPAR, ROSTRA and 1 other brand. A representative part number is WELLS 1S14330.
Part numbers include DORMAN 926337, UNITED MOTOR PRODUCTS OPS348 and WALKER PRODUCTS 2561030, among others listed above.
Outside Mirror Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1899 | 🇺🇸 US 🇨🇦 CA | Cab & Chassis - Conventionalwithout Power Folding Mirrors | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1897 | 🇺🇸 US 🇨🇦 CA | Cab & Chassis - Crew Cabwithout Power Folding Mirrors | 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.
STANDARD MOTOR PRODUCTS supplies both parts for the 2018 Ram 4500.
This group includes STANDARD MOTOR PRODUCTS DWS1899 and STANDARD MOTOR PRODUCTS DWS1897.
Parking Brake Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 4221463 | 🇺🇸 US 🇨🇦 CA | Fits Regular Cab Chassis Wheelbase 3or Regular Cab Chassis Wheelbase 4or Regular Cab Chassis Wheelbase 1or Regular Cab Chassis Wheelbase 2or Crew Cab Wheelbase 4or Crew Cab197.4" Wheelbase | 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.
This group shows a single part: MOPAR 4221463.
Power Seat Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 901477 | 🇺🇸 US 🇨🇦 CA | Front Left8 Way | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | PMS12 | 🇺🇸 US 🇨🇦 CA | Adjusts Seat Memory Function | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S17150 | 🇺🇸 US 🇨🇦 CA | Adjusts Seat Memory Function | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S16027 | 🇺🇸 US 🇨🇦 CA | Lumbar Switch | 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.
4 Power Seat Switch parts are listed for the 2018 Ram 4500, from WELLS, DORMAN and STANDARD MOTOR PRODUCTS.
Economy: 1 part, from DORMAN. A representative part number is DORMAN 901477.
The Standard Replacement section: 3 options from WELLS and STANDARD MOTOR PRODUCTS. STANDARD MOTOR PRODUCTS PMS12 is listed in this group.
Part numbers include DORMAN 901477, STANDARD MOTOR PRODUCTS PMS12 and WELLS 1S17150, among others listed above.
Power Window Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: 6.4L V8 | 920541 | 🇺🇸 US 🇨🇦 CA | Front RightCab & Chassis - Crew Cab | View on Amazon |
| DORMAN Popular Fits: 6.4L V8 | 901989 | 🇺🇸 US 🇨🇦 CA | Front LeftCab & Chassis - Crew Cab | View on Amazon |
| SKP Popular Fits: 6.4L V8 | SKDWS1899 | 🇺🇸 US 🇨🇦 CA | Front Left | View on Amazon |
| DORMAN Fits: 6.4L V8 | 920508 | 🇺🇸 US 🇨🇦 CA | Fits Rear Right | View on Amazon |
| ULTRA-POWER Fits: 6.4L V8 | DWS1993 | 🇺🇸 US 🇨🇦 CA | Front RightCab & Chassis or Crew Cab Pickup | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 6.4L V8 | DWS1899 | 🇺🇸 US 🇨🇦 CA | Front LeftCab & Chassis - Conventional | View on Amazon |
| MOPAR Fits: 6.4L V8 | 56046832AC | 🇺🇸 US 🇨🇦 CA | Fits Power Front Windows1-Touch,Up & Down | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 660175 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 660748 | 🇺🇸 US 🇨🇦 CA | Front Leftwith Power Folding Mirrors | View on Amazon |
| ROSTRA Fits: 6.4L V8 | 660169 | 🇺🇸 US 🇨🇦 CA | Front Leftwith One Touch Auto Windows | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1649 | 🇺🇸 US 🇨🇦 CA | Rearwithout One Touch Window Open/Close | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1994 | 🇺🇸 US 🇨🇦 CA | RightCab & Chassis - Conventional | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1993 | 🇺🇸 US 🇨🇦 CA | Attachment Method: Push On | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | DWS1897 | 🇺🇸 US 🇨🇦 CA | Front LeftCab & Chassis - Crew Cab | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S12999 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S15516 | 🇺🇸 US 🇨🇦 CA | Front Rightwithout One-Touch Open Windows | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S14282 | 🇺🇸 US 🇨🇦 CA | Front Leftwith One-Touch Open/Close Windows | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S14283 | 🇺🇸 US 🇨🇦 CA | Front Leftwith One-Touch Open/Close Windows | 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.
18 Power Window Switch parts for the 2018 Ram 4500 come from 7 brands — STANDARD MOTOR PRODUCTS, WELLS, DORMAN and 4 other brands. The "Popular" part is DORMAN 920541.
The Economy section: 5 options from DORMAN, SKP and ULTRA-POWER. DORMAN 920541 is listed in this group.
Standard Replacement: 13 parts, from STANDARD MOTOR PRODUCTS, WELLS, ROSTRA and 1 other brand. A representative part number is STANDARD MOTOR PRODUCTS DWS1899.
Seat Heater Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Popular Fits: 6.4L V8 | HSS124 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular Fits: 6.4L V8 | HSS120 | 🇺🇸 US 🇨🇦 CA | Rear Right | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68059873AC | 🇺🇸 US 🇨🇦 CA | Fits RightFull Length Upgraded Floor Console, Heated Second Row Seats, Media Hub (SD, USB, AUX), Single Disc Remote CD Player | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68059874AC | 🇺🇸 US 🇨🇦 CA | Fits LeftFull Length Upgraded Floor Console, Heated Second Row Seats, Media Hub (SD, USB, AUX), Single Disc Remote CD Player | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S17438 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| WELLS Fits: 6.4L V8 | 1S17439 | 🇺🇸 US 🇨🇦 CA | 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.
6 Seat Heater Switch parts are listed for the 2018 Ram 4500, from STANDARD MOTOR PRODUCTS, MOPAR and WELLS. STANDARD MOTOR PRODUCTS HSS124 carries the "Popular" badge.
Listed part numbers: STANDARD MOTOR PRODUCTS HSS124, STANDARD MOTOR PRODUCTS HSS120 and MOPAR 68059873AC, plus the other parts above.
Seat Lumbar Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | PSW165 | 🇺🇸 US 🇨🇦 CA | Front Left | 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.
One part is listed for the 2018 Ram 4500 — STANDARD MOTOR PRODUCTS PSW165.
Steering Wheel Audio Control Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOPAR Fits: 6.4L V8 | 56054450AA | 🇺🇸 US 🇨🇦 CA | Steering WheelEvic | View on Amazon |
This table covers the Steering Wheel Audio 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.
This group shows a single part: MOPAR 56054450AA.
Trailer Brake Switch
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SHEE-MAR Popular Fits: 6.4L V8 | SM1902 | 🇺🇸 US 🇨🇦 CA | Cab & Chassis - Crew Cabwith Trailer Tow Relay | View on Amazon |
| AUTOTECNICA Fits: 6.4L V8 | RM0222121 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| DORMAN Fits: 6.4L V8 | 601235 | 🇺🇸 US 🇨🇦 CA | Switch Only | View on Amazon |
| MOPAR Fits: 6.4L V8 | 68288760AC | 🇺🇸 US 🇨🇦 CA | Trailer Tow Module | View on Amazon |
| SKP Fits: 6.4L V8 | SK959A01 | 🇺🇸 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.
5 Trailer Brake Switch parts are listed for the 2018 Ram 4500, from SHEE-MAR, AUTOTECNICA, DORMAN and 2 other brands. SHEE-MAR SM1902 carries the "Popular" badge.
This group includes SHEE-MAR SM1902, AUTOTECNICA RM0222121 and DORMAN 601235 and the remaining parts above.
Transmission-Automatic Fluid Pressure Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FAMOUS BRAND Fits: 6.4L V8 | SBA2005 | 🇺🇸 US 🇨🇦 CA | Automatic Transmission Oil Pressure SwitchAisin Trans | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS Fits: 6.4L V8 | 1S16124 | 🇺🇸 US 🇨🇦 CA | Aisin 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.
2 Transmission-Automatic Fluid Pressure Switch parts for the 2018 Ram 4500 come from 2 brands — FAMOUS BRAND and WELLS.
The Economy section: 1 option from FAMOUS BRAND. FAMOUS BRAND SBA2005 is listed in this group.
Standard Replacement: 1 part, from WELLS. A representative part number is WELLS 1S16124.
Listed part numbers: FAMOUS BRAND SBA2005 and WELLS 1S16124.
Turn Signal Switch
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 6.4L V8 | 901279 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 6.4L V8 | 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.
2 Turn Signal Switch parts for the 2018 Ram 4500 come from 2 brands — DORMAN and STANDARD MOTOR PRODUCTS.
The Economy section: 1 option from DORMAN. DORMAN 901279 is listed in this group.
Standard Replacement: 1 part, from STANDARD MOTOR PRODUCTS. A representative part number is STANDARD MOTOR PRODUCTS CBS1925.
This group includes DORMAN 901279 and STANDARD MOTOR PRODUCTS CBS1925.
Buying Electrical Switch & Relay Parts for a 2018 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. Every electrical switch & relay part here is 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 4500?
Our catalog currently lists 108 electrical switch & relay parts for the 2018 Ram 4500 across 28 subcategories and 14 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 2018 Ram 4500 engines?
Yes. Every electrical switch & relay part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. 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 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 2018 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 2018 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 2018 Ram 4500
Electrical Switch & Relay Parts for Other Ram 4500 Years
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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.