I'm helping a buddy wire up some lights on his truck and he has to leave to head back home to arkansas today. We've got all his turn and brake lights working but his reverse lights have quit working now and they're not working from the truck. The fuses are good. What else can it be? The back up light did touch another one while we were wiring up but the fuses are fine. The reverse lights work on the rv plug. The truck is a manual if that changes anything. Thanks.

 

sounds like you tripped the TIPM.
Get a scanner and you will find a trouble code and clear it. I bet they will work then. There is no fuse for the back up lamps on that truck. It is handled by the Totally Intergrated Power Module.