How to Find the Stop Light Switch Circuit on a 2013 GMC Terrain

Updated 06/26/2018 | Published 06/25/2018

Products Featured in This Question

Curt Venturer NEXT Trailer Brake Controller - Up to 3 Axles - Time Delayed

(145)

$73.67

Roadmaster Stop Light Switch Kit - Chevrolet Equinox / GMC Terrain

(718)

$45.99

Question:

I purchased a curt brake controller C74VV. I do not have the tow package plug. Which wire do i attach the red wire to on my brake controller. The wire on the BCM #11 IS white. Any help would be appreciated.

asked by: Edward

Expert Reply:

The stop light switch circuit on your 2013 GMC Terrain that you will need to find to install the Curt Venturer Trailer Brake Controller part # C74VV will need to be accessed through the body control module (BCM). The BCM is located under the driver's dash above where your left knee would be.

On a 2011-2012 GMC Terrain we found that the white wire in the #11 position on the black connector was the correct circuit for the stop light switch. If the wire you have on your 2013 in this position is white then this is more than likely correct but I do recommend using a circuit tester to check this. If the wire is not white then I recommend contacting your local dealer to find the correct pin that houses the stop light switch circuit as we do not have any diagrams for the 2012+ models.

Another option you have would be to tap into the center high mounted stop light (CHMSL) circuit or just run your own stop light circuit with the Roadmaster Stop Light Switch Kit part # RM-751439. I have attached a photo of the BCM for you as well.

expert reply by: Conner L