Gmc Wiring Diagram For 7 Pin Trailer Connector. This video shows the process of relocating a trailer wiring connector from inside of a truck box to the rear bumper near. The seven-pin connector trailer wiring harness, is located at the rear of the vehicle and is tied to the vehicle's frame.
I traced the wiring back to the engine compartment and found a blue wire. Connect the wiring from any trailer to your GMC, quickly and easily. The three additional pins are: trailer brakes, back-up lights and eTrailer: Trailer Wiring Diagrams.
Trailer wires never work if you do them your self, EVER.
It is easy if you have patience.
Anyone have a diagram of which pins supply which functions? Crimp each connector then plug the connector into the tow vehicle. With such an illustrative manual, you will be capable of troubleshoot, avoid, and total your assignments without difficulty.