Is the dashboard battery / alternator light supposed to go on when starting the car? My light doesn't go on. The manual indicates it should and then go out, unless there's a problem with the charging circuit. My light doesn't go on at all. I just replaced batter and am trying to figure out if I have an alternator problem also. Thanks.
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Re: 1996 bmw 328is alternator light
The light for the indicator could be out, as you mentioned it should come on (along with some other indicators) when staring the car and then go out after a second or two. Is the car still not starting after the new battery install? If you have AAA they can come out and test your alternator and battery (charging system) and that might indicate whether you have a alternator problem or not, as well if you are savvy enough you can remove the alternator (assuming the car cant be driven) and take it to your local Kragen os similar auto parts store and the should be able to test it for you...usually for free. Hope this helps
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Alternator. Have it tested with a voltmeter while on the car and running. Or take it off and have it tested. The current to run the car and the accessories is from the alternator when the engine is running. The battery light coming on alerts you that the alternator is not doing its job.
Your battery was probably killed by heat, sitting and not being used and getting hot inside a garage will kill a battery, heat is a battery's worst enemy. No your altenator is probably not bad, test it with a meter by placing the red lead on the positive and black on negative, measure voltage before starting the engine, then again after starting the engine, before should be 11.5v-12.5v, after should be 13.5v-14.5v if these reading are the same on your car all is ok. Hope this helps, let me know.
My 2003 325xi died on the highway a few weeks ago, and I thought it was the battery. It turned out to be the alternator, which was an expensive problem to repair. If your battery is new, it could be the alternator, or a problem with the electrical system. I find the BMWs to be too complicated electrically, which often leads to problems! I'd check your alternator...