Here are the wiring Diagrams for the 2018 RAM HD Body Wiring. This should work for late year 4th gens.
| Stereo Premium Alpine Wiring |
Backup Camera Cab and Chassis Wiring
| Heated Seats Wiring |
| Horn Wiring |
| Hvac Automatic Control Wiring |
Interior Lighting System wiring
| Park Assist Wiring |
Passive Entry Lock system Wiring
| Power Outlet Wiring |
| Seats Power Memory Wiring |
| Setas Power Wiring |
| RamBox Lock Wiring |
| Theft Security System wiring |
|
Exterior Lights |
| Backup Light Wiring |
| Headlight Projector Wiring |
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| Stereo Premium Alpine Wiring |
Backup Camera Cab and Chassis Wiring
| Heated Seats Wiring |
|
|
|
|
Interior Lighting System wiring
|
|
Passive Entry Lock system Wiring
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|
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| Theft Security System wiring |
|
Exterior Lights |
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| Headlight Projector Wiring |
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