OK i have an aftermarket head unit. It works fine, but about once every 2 months when I start the truck I have no power to it at all. Even if I was jsut listening to it 5 minutes before hand. The only way I can get it to come back on is to remove all the fuses from the kick panel wait a few seconds and put them back in. I have checked the in-line fuse and it is good. It only stops working after i shut the truck off and start it back. Like I said I does it about every 2-3 months.