Rvs Lights come on when braking
 

Have looked on the forum, can't find a good answer. Wondering how to solve this. The PO put on a new fender on the box and I think he hacked up the wiring going to the rear of the truck (It is a 2005 Dodge 3500 quad cab long box 4 x 4 with a 5.9). Any wiring diagrams, or anyone with some "easy" fixes for a newbie to try? Shop wanted $400 to diagnose and fix. Don't want to give them the money if it is something I can do

Thanks for the help.

Look on weeds links

What is weeds links

He is a member on here, has manuals

Found him! Thanks!

Great, hopefully it's just a bad ground. IMO I would start with that. It should also be the easiest to trace. Is it both side or one?

both lights