Third Brake Light Wire Location for a 2015 Chevrolet Silverado 1500

Published 08/07/2018

Question:

2015 chevy crew cab trying to find blue wire you speak of, peeled bake a foot of harness and didnt find extra blue wire. Did I just not go far enough?

asked by: Bernie

Expert Reply:

Sometimes there is a blue wire in the loom of the 7-Way but if you are not seeing one that likely means that there is an orange wire under the dash on the driver's side of your 2015 Chevrolet Silverado 1500 that you need to use. This should be the CHMSL wire and carries the stop light signal that you would need for a 3rd brake light.

I would try locating this wire and testing it with a circuit tester like part # PTW2979 before routing wire for your application.

expert reply by: Jon G