First off, your lighter should be a source for switched power so i dont know whats goin on there but I can tell you this. If you pull the underdash off at the steering column ( should be two small 7 or 8 mil bolts and then body clips up top) chase the ignition harness and look for either a pink or white wire. These will be your first and second igniton wires. That way you really are getting a definite switched signal. Next pull your radio and count the pins as they mate up from harness to harness. If you have a volt meter you will need it. You can maybe touch the side of the cigar lighter socket for your ground and start poking pins at the wiring harness coming from the car and going to the radio. with the key turned on you should find two pins reading 12v. Turn the key off, and check again that will tell you which one is switched. Or you can just run that switched wire from the radio harness straight to the ignition wire that i told you about at the switch . I would also checked all of the wires at your switch to make sure that none of them are crossed. I dont know why but I just never trusted schosche harnesses though I have only had a problem with one. Does your car have onstar or bose?
THIS IS MY BONNEVILLE. THERE ARE MANY BONNEVILLES LIKE IT, BUT THIS ONE IS MINE
WITHOUT ME, MY BONNEVILLE IS NOTHING AND WITHOUT MY BONNEVILLE, I AM NOTHING...
Black 2001 SE Grey Leather Interior: