the O.Z.

I guys. I just finished installing my new Audio system. Everything sounds great. When I went to start my car to take it for a spin I it wouldnt start. It just cranks and cranks and cranks.... doesnt sound like a dead battery. It is cranking pretty healthy. Aslo... I tried jumping it... same thing. Another funny thing is happening too. The fan runs when I have the key in the ON position. It shouldnt be doing this when the car is cold, right? I have a feeling the ECU was reset... or I did something that I don't know I did. I have installed plenty of audio systems before... but have never run into this.

HELP PLEASE!!!!