Stoplight Switch for Brake Controller Install on 2017 GMC Savana

Question:

2017 GMC Savanna trailer brake controller installation. I located 4 wires next to the emergency brake pedal. The red and white striped wire is supposed to be the hot wire, which is supposed to go back to the fuse box. But I can’t figure out which fuse it is. The wire is dead. Can you please help me.

asked by: Earl S

Expert Reply:

I am not 100 percent certain which fuse you are referring to for installation of the Tekonsha Voyager Trailer Brake Controller # 39510 with Brake Control Plug-In Harness # 20127 though I took a look at an online copy of the owner's manual for a 2017 GMC Savana and the fuses are listed starting on page 248.

Also keep in mind if you are looking for the cold side of the stop light switch it will only have voltage with a circuit tester like # PTW2979 when you press the brake pedal.

I have added a link to a help article on brake controller installation as well, which I strongly recommend checking out.

expert reply by: Kyle S