I need help on the wiring for 1988 Chevy Scottsdale suburban. Everything I look up says orange is constant 12v and yellow is switched 12v. Well the only wire showing any juice is the yellow. If I hook up to it my radio clicks when I start the truck and looses all memory.

 

Check your fuses, maybe you blew the fuse for the orange wire. There should be 2 fuses for the radio circuits.

 

Ok i will check. Thank you.