I have a 2018 Chevy 3500 HD with aux switches on dash. Where are the wires from switches stored? What color wire goes to which switch? Are the switches on battery or ign?
The auxiliary switches are referred to as RPO 9L7. As I read it, the wires may be blunt cut (with RPO E29) or terminate in the X61A instrument panel junction block (without RPO E29).