I wonder if you could put in a trailer wiring harness that just plugs into the harness in the back and just run it to the front.I have an 07 GMC Sierra Ext Cab 1500. I tow this truck behind my motor home. I am putting on the towing stuff and I have two problems. First, I have to find the brake light switch and cut into the "cold" side of the switch. I can't find the switch...it is not like in the old days and it is above the brake pedal. Secondly, I have cut into the tail lights and there are so many wires going to them I'm not sure what wires to cut. Does anyone have a wiring diagram of this truck or could tell me what what wires to cut and splice into?? Thanks...
You know the kind that just plugs into the harness with a t in it that goes to the rest of the harness and then the t part goes to the trailer.
The system would be dead until you plug into the motor home, then live.
Not sure so don’t take my word for it, check it out.
This site may be helpful, not sure. There is a search button on the top that may be of some help.