I recently bought an 01 Gt convertible with a couple of issues. Most are fixed but i’m stumped on the alternator overcharging. It’s a brand new alternator that charges at a normal 14V at idle and low Rpm, but at higher Rpm (4500+) the battery massively overcharges and cuts all the interior...
Ive seen alot of post on the subject but didnt see one that looked like my issue.
So i was driving for about 30 kilometers to the city for a car meet and parked.
When i started the car later the battery lamp was on and the alternator gauge (original) didnt show anny signs of life! UNTIL...
I noticed my tps and other sensors like iac and others are giving a 12 volts read on my multimeter with key-on instead of the usual 5 volts
it goes as high as 18.5 volts with car on!
I'm guessing those ("missing") 5 volts show up eventually when I turn the car on? But wait , how can that be...
I...
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...