Alternator

RUTH26

MEMBER
2000 BMW 323
2WD
AUTOMATIC
250,654 MILES

Okay, so I have the car listed above (model i). I just got a new battery for it and it is not charging. I replaced my alternator in 2015. I did an alternator test on it. It says it is running 120 amp but not charging battery. The alternator itself is 120 amp. So I do not know what to do. Can you help?

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,904 POSTS

It cannot charge at 120 amps and not give some kind of charge voltage. Is the alternator a Bosch rebuild? Cheaper rebuilds do not work right. But to be sure lets check the wiring to makes sure you do not have a connection issue. Check fuses f30 and f34.

https://www.2carpros.com/articles/how-to-check-wiring

and

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.

Cheers, Ken

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