How to Wire a Brake Controller to a Vehicle with Blunt Cut Brake Controller Harness Wires

Updated 08/11/2015 | Published 08/10/2015

Question:

i got a tekonsha p3 brake controller as a gift and have a few questions about the wiring. the factory wiring is labeled dk blue brk out, red fuse +, lt blue brk sig, blk brk grnd, and brn as illum. i know the illum is not needed. the red is my + power and blk is the ground. what is the stop light function from the factory and what is the brake function from the factory? thanks

asked by: Ryan

Expert Reply:

Sounds like you have a vehicle that has a brake controller install harness that has blunt cut wires to use for installation like an older Chevy truck.

To install you P3 part # 90195 you will run the blue wire of the controller to the dark blue wire of your vehicle labeled brake out. The black wire of the controller to the red wire labeled with a + sign. White from the controller to the black wire labeled ground. Finally red of the controller to the blue wire of the vehicle labeled brake signal.

expert reply by: Jameson C