As the says I have a 1999 Yukon Denali that the Rear Brake and Turn signal on Drivers side are not working. Also brake light on trailer DOES work but not the turn signal on that side.
I tested the Tail light circuit by plugging it into the passenger side and it works so that rules out that.
Anyone know what wires to test under the dash to test the combo / multi switch?
Also the tail lights or park light do work (both top and middle bulb lights up when the vehicle is running) its just brighter filament does not light up when breaks are pressed or turn signal is on.
Thanks,
U2Desire