I have an 89 gt. I parked it before our storm this week. and everything was fine. went out friday and cranked it up and the amp gauge was pegged at 18 amps. if i turned the lights on it would drop down a bit but still way to high. is there a voltage reg. on these cars or what else would cause this. I'm kinda new to stangs but thought i would tap into the knowledge of everybody here before i start tearing apart stuff.

 

sounds like what mine did when the alternator went out. check the plug on the alternator and the fuseable link by the solenoid.

 

It's internally regulated. The alt needs rebuilt/replaced.

 

I appreciate the info. at least i have a starting point. I will check the plugs and then pull it off and go to the parts store and get a test on it. thanks alot guys.

 

and if you replace it get a new plug.

 

if for some reason none of that works pm me. my mother can find any kind of short in a harness and can fix it if there is one.

 

well its not the alt. had it tested and it was working like it should. so now time to check the gauge and all wires.