there isn't a fuse on the back of this radio. but thanks for everyones help i was able to take it to a local shop that sells them and they hooked it up to their harness and it started right up so we took it back out to my truck and hooked it up and guess what it started working. the guy that was helping me said he has never seen that happen before because he tried to hook it up to my truck first and it still didn't work but after he plugged it into their harness and then back in my truck it works. i guess it is just one of those weird electronic things