HELP: I noted the comment about popping sound amps, and about a year ago, had Best Buy Mobile rewire, as they said, to somewhere in the dashboard. They didn't have the amps 'hot' or on all the time, as far as I know. I don't think they used any resistor or relay. What I do know is the car began having weird electrical behavior (I actually had a stall and had to take off a battery protector shut off device). I think the check charging system light came on starting a few days later. I have had batteries and charge system checked by 3 shops, they all say there's nothing wrong they can find! I called Best Buy corporate to complain about the installer (head unit), and he put in a fuse link, to unhook the radio. I tried that, but the charging warning came on the next day!
It's frustrating, b/c I'll have to sell the car eventually. Anyone got any advice I can give to another Best Buy shop nearby, b/c I need to get something done!
btw, miine is GT convertible, only mod is the Pioneer 9400 head unit, and sequential tail lights.