Is there a fusable link some where between the battery and the stereo? My stereo is not gettin constant power. It was for the longest time and one day it jus turned off never to turn on again. I have checked the fuses and relays, looked for fried wires, checked connections but nothing. The only thing I don't know like the back of my hand on this truck is the wiring harness. Any clue to what might cause this?