I finally found the problem. Water overflowed my rear sunroof drain while parked on my steap driveway. Normally the truck parks on flat ground or in a garage so we never had a problem. I guess the rear drain get handle large amounts of water on its own. I tested the truck on flat ground and it never overflowed. Once on the driveway it did well with a light rain but failed when it came down hard or you washed the truck.The water ran down the wiring harness and filled up a junction connector were the Radio 2 fuse power as well as the acc circuts run to feed the amp. The water caused a back feed of 6 volts to the radio and muti display unit since the radio 2 fuse is a constant hot. Thanks for all the suggestions and don't park on steap driveways with sunroof models. Aloha Mark