Hey quick question. OK, I got a new alternator at autozone on 9/12/04 after mine died. It ran fine until yesterday, when my low battery light came on. I had autozone charge my battery then test it, and it tested bad.

I got a new battery, and it was OK for the drive back to my apt, but today going to work, the low battery light came on again. It stays on under 1,000 RPMs, and at intermittent times throughout the RPM band. I checked the connections on the alternator and they seem tight. The belt is also at a good tension.

The battery is only at 11.7V when the car is on, when revved, it stays at 11.7 instead of going above 13. The volts directly on the alternator are also under 12. What could the problem be? A bad diode in the alternator? Its only 2 weeks old, and I wanted to get your opinions before I go in and get a replacement for it tomorrow. Thanks!