This part has 4 wires coming out the back. I need to know what each color represents. Colors are Blue, White, Red, and Black. Thanks.
asked by: David
The blue wire carries the brake controller output voltage, the white wire provides the ground connection and is usually ran to the negative battery terminal, the black wire is the 12-volt power supply, and the red wire typically connects to the brake stoplight switch located above the brake pedal. This connection activates the trailer brakes once the brake pedal is applied.
I'll link you to our Brake Controller FAQ page, which contains much more information about brake controllers. If you'd care to reply and tell me the year, make and model of the vehicle, I'd be happy to provide more specifics.