Discussion Starter · #1 ·
Recently ran into and issue with my truck that the brake lights are not working. The turn signals, reverse lights, and tail lamps work. I've replaced the the brake switch and know that it is not the problem. My brake controller lights up at the press of the brake pedal. Brake switch has a constant power from the blue/pink wire. Fuse is good. This might get confusing but I found a power wire on the connector in the front driver fender well. It is a white/brown wire that only gets power when the pedal is pressed. Traced it all the way to the back and it doesn't go to anything(leads me to believe it is the factory trailer brake wire) I can run a jump wire from it to the left turn signal wire and get brakes and a right turn blink, no left turn blink. Also I can jump it to the right turn signal and get brake lights as well as a left turn, no right turn. I have heard about the multifunction switch going bad. And I figured if i had a turn signal I should have a brake since its one wire! Just real confused. I would like to confirm it would be the multifunction switch before I just go and buy one. Thanks for your help!