Electrical Overcharging Issue.

[CorbinGT]

Hello,

My 94 Mustang GT is overcharging by that I mean The voltage gauge pegs. It only starts to do this after about 20 minutes of driving and after I get on it. It has a rebuilt alternator that bench tests perfectly and a new voltage regulator as well. Battery is fine, tests fine,car starts right up and runs perfect for about 20 minutes, then it overcharges under load. I am stumped. Could bad pigtails that plug into the alternator cause this? Like I said this only happens after driving the car for about 20 minutes and after say I do a burnout or slam a couple gears.

Thanks, Corbin

 

[jozsefsz]

You'll probably want to verify the gauge is working before worrying about anything else, if that's your only symptom, and everything is testing good.

 

[CorbinGT]

Thanks for the response.
Well what concerns me is all my lights get brighter, and my air bag light came on? Would that happen if just my gauge is bad.