2001 Ram 3500 Wiring Problem

[jaritc]

Hey all, trying to help my father-in-law with his 2001 Ram 3500 34 valve Cummins. Took road trip last weekend and started having electrical issues. Right turns work fine. Left turns on all lights blink on truck. front, back, top. Additionally, when you push on brake pedal, all the lights in dash dim. That doesn't matter if turns are on or off. Does it regardless. turns weren't working at all, replaced flasher relay earlier, now we have this problem with the left turn. Wanting to try and get hands on wiring schematics or even some guidance on where to start. Seems like it would be a possible 12v with a bare spot feeding over and causing the issue?

 

[tron67j]

Sounds like a bad ground or corroded contact somewhere. Check all grounds, take off and clean and repair any badly damaged connectors. Check all the light wiring continuity for any aberrations.