Brake Controller Installation in 1999 GMC 2500 K Series Pickup

Question:

Wich wire on the brake pedol and how do i hook the red wire to the brake pedol i can not take wireing conector off the brake pedol

asked by: Mike S

Expert Reply:

You can use a circuit tester like # PTW2993 to probe the wires at your GM pickup's brake pedal light switch to find the one wire that carries a voltage ONLY when the pedal is pressed but at no other time.

This wire that goes hot only when you press the brake pedal is the one from the cold side of the switch. This is the one you need to connect to the brake controller's red wire, to tell the controller to active the trailer brakes.

You can refer to the linked video showing installation of a Prodigy P3 # 90195 controller in a 1997 C/K pickup.

expert reply by: Adam R