Ok I have an 08 v6 with the notorious shaker 500. Battery was draining over night and I read all the crap about the ty radio/amp issue. Completely unhooked the radio harness from the head unit. Seemed to stop the battery drain....for about a year. Now it's doing it again (radio still unplugged). Are the amps powered seperately? I have tested each fuse inside and out and see nothing that would drain the battery dead overnight. Unplugged the trunk bulb, etc... something is still killing the battery. Any suggestions? I'm wondering if the amps are still cutting on even with the radio unhooked. ...I don't know what else. Sick of this battery draining gremlin in this car. Oh...I've tried 2 new batteries as well.....