I just finished installing a new Sony Xplode 500w amp and it only powers up when the seat is upright. Does it have something to do with the ground wire that is connected to that seat? I'm happy it works though with all the trouble I've gone through with installing it. If anyone has had this problem please respond.
Whoa guy, what are you doing grounding to a seat? You should be grounding it to the car chassis under the back seat. You have to sand down some paint/coating. Do it properly once, then you'll be able to enjoy it for a long time.