l69gm

My alt. light stays on when the car is idiling.When i bring the r.p.m up,the light goes out.The alt.is charging though.Anyone have a idea why it does that?Ground problem?Thanks.

Fun71

The alternator may not be charging sufficiently, as in there may be a leaky diode. I had that issue on my car back in the 90s.

I guess I should ask what type of alternator setup you have: factory setup or some sort of retrofit?

l69gm

Its the factory set-up.All stock.

cherokeepeople

it could be charging fine and have a bad diode.

Gerald Nickels

Take your alt. to a auto parts store and get it checked.

oldcutlass

Is it an internal or external voltage regulator?

l69gm

It has the internal voltage regulator.

oldcutlass

Then yes, get the alternator checked.

stellar

Is the belt tight?

l69gm

Yes,Belt is tight.Thanks for the info.everyone.