maz duh
+1y
I don't have the diagram you need but if its only messed up on the rear you could probably unplug it at the rear of the cab and replace it with one from a donor truck. Then your not stuck with previously bastardized wiring. I used to have a Hardbody daily that suffered from a similar issue, mine was butchered trailer lites from a previous owner. The harness was farked pretty bad so I just replaced the rear section and my issues were gone. good luck with the project.