My 01 has the towing package, I found the wires under the rear bumper on the driver's side. There is a left/brake, right/brake, clearance, and ground on a 4 way plug and a small gauge blue wire, I am assuming that is the trailer brake wire. My question is does the D/C wire harness have a wire that is used to charge the trailer battery or do I have to run one from the truck battery?
Thanks,
Thanks,