1,6,7,8 - Series and Mini CooperGeneral Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.
the alternator is not charging the battery.... still looking into the regulator....
__________________ 1991 Ford Taurs SHO 5 Speed White on Tan
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1976 Mercedes Benz 300D with a Ford 5.0L Fuel Injected soon to be Modded I am Captain Obvious
yeah i put a meter on back of the alternator no charge coming out
You replaced the alternator, the alternator is still spinning with the belts, you tested the alternator terminals during vehicle operation, and no voltage? Sounds like you replaced a bad alternator with a bad alternator.
i got the alternator from autozone when i took the first one off and took it and got it tested they said it was good but i went ahead and bought it anyways are they somthing in the car that makes it charge like a relay
you need to use a multimeter at the back of the alternator with everything connected check voltages at the large post with red wire (B+) as well as the small post (D+) You should have over 12v at each terminal. Change the meter setting to ohms and check betwen the case of the alternator and 1 of the bolts on the shocktower. You should have less than 1 ohm. Report back with results.
11.21 at BOTH the thicker wire (B+) and the thinner wire (D+) at the back of the alternator?
is this measurement taken with engine running or not running?
does the battery light in the dash illuminate?
your alternator needs three things in order to charge.
1) power at B+ which is the big positive wire coming from starter
2) power at the D+ wire also referred to as an exciter wire which is the smaller wire which goes through the instrument cluster and feeds the back of the alternator on the smaller eyelet
We checked all of those things so unless you made a mistake in your measurements then it sounds like a bad alternator. Of course I'm not standing in front of the car so all I can do is make suggestions. I dont know much about autozone alternators because I only use facotry parts for BMW but years ago I used to buy alternators from Kragen and had terrible luck.. one time i purchased 4 alternators before I got a good one.
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