Where to Find Stop Light Switch For Wiring In a Brake Controller to a 2012 Chevy Colorado

Question:

I can not find the right wire to attach the red wire on controller to brake switch? Truck has existing 4 way factory install and stabil trak system. all tested wire are hot till brake is depressed.

asked by: T. D

Expert Reply:

I spoke with my contact at Tekonsha, who tells me that they have not yet had an opportunity to locate the stoplight switch wire in a 2012 Colorado. From what I understand, somewhere in the main wiring harness there is supposed to be a wire used for a connection directly to the stoplight switch, but in vehicles not equipped with the tow package, this wire is taped up into the harness. Since Tekonsha borrows vehicles from a local dealer, they cannot go cutting into that wiring harness to determine the actual location or color of the wire.

My contact told me that there is an alternate location under the hood to access the circuit. In the power distribution fuse box under the hood, there is a relay for the center mounted stoplight at the rear of the vehicle. If you can find the Light Blue wire feeding one contact of that relay, you can tap the red brake controller wire in at that point.

expert reply by: Jameson C