Check the two red/red black wires off the relay. They should be hot when the key is inserted into the igntion. The relay is above the gas pedal, and towards the center of the car, one is for the windows The one closer to the firewall is the radio relay. If it clicks, it's good. If you have power on both red/ red blacks, it's the fuse. Is the deck good? It's hot right?:
Edit:
The ignition switch is probably melted.