HELP!!! My battery doesn't charge.
 

OK, all my cluster lights came on, even the "door" light. My lights atarted to dim and then it dies on me. My turbo timer says the voltage went from 13.5 volts to 8 volts..... What could this be? I need help...I replaced the battery(3 yr. warranty) i think Alternator.....any help is appreciated.
hassell

Get a real voltmeter and measure the voltage across the battery terminals while the engine's running. If it's not at least 14V, your alternator is shot. Take it off and have it rebuilt.

how much does it cost to have it rebuilt?

make sure all the wires are in good condition on the alternator to battery, no loose wires.

ok, checking it right now

sounds alot like alt, but it's electrical, could be anything (especially on a 12+ year old car)

My battery reads over 14 volts only when the engine is revving a little, not at idle. It reads somewhere around 12.6 at idle.

I just had the alternator checked and they said it was good.

Mines the same way and I have a new battery and a new S5 alternator.

Thats really weird, i would of thought your alternator would of been going...

I just bought an Optima yellow, the battery survived the trip from Atlanta to Jacksonville (396 miles) with a bad alternator, and started up the next morning!

I found out it was a loose connection and the battery charges fine now, but holy smokes, I didn't expect this from any battery.