I bet one of your plugs under the hood have come loose, I had all power to my radio and dash display go out one time and it was because I had been doing some modifications under the hood and unplugged the big white plugs near where you AUX switch wiring is, I forgot to plug them back in before starting the truck, and I lost power to the radio and dash display, when I plugged them back in everything was fine. Just a guess, but worth a look.
