I put my GPS in the Vette the other day and while waiting for it to aquire sattelites the radio and GPS both shut off. I checked the fuses and found the radio fuse blew, so I unplugged the GPS changed it out as soon a I turned the key on it blew the radio fuse again. I am thinking there is a dead shorted wire between the radio wire and the cigaette lither wires. Anyone have any other ideas? Or have a wiring diagram for these underdash wires so I can try to locate the problem?