OK, so I bought my friends aftermarket CD player and we took out the stock CD and casette player. Then we started wiring the new CD player in. The first day we were missing one on the wiring harnesses for the speakers, but we were able to get power to the deck.

The next day we went back to Best Buy to get the right wiring harness. When we intalled it all, the new deck wouldn't even turn on.

We said screw it and put the stock Radio and CD player back in the car and now they wont even turn on. Have I blown a fuse or disconnected a wire deep in the car?

BTW my car is a 2000 Mustang V6 without the mach 1 sound system.