Wire Labels of Brake Controller Wiring 2016 Chevy Express Explained

Question:

I have a 90195 Tekonsha controller, found the 4 wire bundle under dash to connect to. Do bl = trl aux cir. Assume this goes to blue wire from controller says to brake trailer connector. Wire labeled fu chmsl assuming goes to controller marked stoplight red. +/- are obvious. Am I correct?

asked by: Tabbott

Expert Reply:

Yes, the circuits you found for installing the P3 part # 90195 that you referenced in your 2016 Chevy Express Van are correct. The CHMSL circuit stands for center high mount signal lamp and is a dedicated brake light circuit and runs to the red wire and then the blue wire of the controller goes to trailer auxiliary circuit.

expert reply by: Jameson C