Locating Brake Stoplight Signal Location on 2012 GMC Terrain

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Question:

2012 GMC TERRAIN. I CANT FIND THE BRAKE LIGHT SWITCH IN THE BCM. I TRIED THE WHITE WIRES IN THE BLACK PLUG BUT NO LUCK

asked by: TREVOR

Expert Reply:

Use a circuit tester like part # PTW2993 on the wire in the # 11 terminal on the black BCM connector, as shown in the diagram I provided. The wire colors can vary during a production run, which is why we typically recommend that folks wire by function, not by wire color.

As an alternate method, you can use a fuse tap like part # F2526 on the CHMSL (center high mounted stop lamp) fuse in the fuse box. The lid of the fuse box should have a legend that will tell you which fuse location is needed.

expert reply by: Mike L