19.5 Volts from battery....

gotchopsticks · Nov 11, 2007

the other day i was on the 91 freeay, and for anyone in SoCal you kno what thats like, and i was only moving 5mph at best, and i noticed my lights gettign real dim and my stereo turning on and off. then when i would accelerate the light got brighter and the radio would be fine. so then i started watching the volt meter, and when idleing the meter dropped to the left line, and when i accelerated it went back to the middle. so i got home and tested my battery and its putting out 19.5 volts. the indicator in the top is red, and as far as i kno it is the OEM battery. what will this do to my car?

the98stang · Nov 11, 2007

Have your alternator tested.

03ghoststang · Nov 11, 2007

your voltage regulator took a chit time for a new alternator, had it happen on my 5.0 i was getting 20.x volts replaced it gone

281CI96Coupe · Nov 11, 2007

Yeah your alternator is going, you can live on a limping alternator but it gets annoying, your idle is extremely low, and it shakes at light because its trying to sustain power...

gotchopsticks · Nov 11, 2007

are you sure its the alternator and not the battery? i thought if the battery was bad then the car had to rely on the power from the alternator, and at higher rpms the output from the alternator is higher = brighter lights and so forth? that sucks, alternators are a pretty penny...

Mike97gt · Nov 11, 2007

gotchopsticks said:
are you sure its the alternator and not the battery? i thought if the battery was bad then the car had to rely on the power from the alternator, and at higher rpms the output from the alternator is higher = brighter lights and so forth? that sucks, alternators are a pretty penny...

it's the alternator... but considering the overcharge you will probably need both now.

trinity_gt · Nov 11, 2007

With 20Vdc you're risking boiling the battery as well as frying other electronics in the car. I wouldn't drive the thing until the alternator is replaced.

gotchopsticks · Nov 12, 2007

alright thanks guys.... anyone kno why the alternator went bad? are the u/d pullys the culprit?

Mike97gt · Nov 13, 2007

gotchopsticks said:
alright thanks guys.... anyone kno why the alternator went bad? are the u/d pullys the culprit?

No the regulator went bad.

03ghoststang · Nov 13, 2007

gotchopsticks said:
alright thanks guys.... anyone kno why the alternator went bad? are the u/d pullys the culprit?

see post #3

svttech76 said:
No the regulator went bad.

19.5 Volts from battery....

gotchopsticks

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19.5 Volts from battery....

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