Gm Trailer Brake Wiring Diagram. This color trailer wiring diagram will help you when you need to connect your trailer to your truck's wiring harness or repair a wire that isn't The worst that usually happens with screwy trailer wiring is a blown fuse on the tow vehicle—or something wacky, like reversed turn signals or blinking brake lights. I thought if I had the wiring diagram, I could resolve my problem.
The dealer I bought it from said it used to have a trailer brake installed and I was just assuming that was the case, but now I'm not so sure. Unfollow trailer wiring gm to stop getting updates on your eBay Feed. I thought if I had the wiring diagram, I could resolve my problem.
It is called an "Integrated Trailer Brake Controller" and is part of ABS apparently.
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If that fails it would be time to take it to the dealer for warranty work. if memory serves, my manual said that the trailer power wires were not connected at the factory, the must be connected by the owner. This post says to tap into the brake light wire by the pedal, using the white w/ brown wire. I don't have a wiring diagram on me, so I don't know which of these translate into which wires in the back.