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-   -   Battery light came on what can it be? (http://www.bimmerfest.com/forums/showthread.php?t=678220)

NorCalGOAT 02-23-2013 10:45 PM

Battery light came on what can it be?
 
I have only had car for a few weeks its a 2001 4.4i and today battery light came on. I turn car on and off to see if it corrects itself but still on. Before I take to get look at figure I check in her first. Seems to run good and starts up fine

Thx u

upallnight 02-24-2013 05:56 AM

Alternator stopped alternating.

QSilver7 02-24-2013 08:10 AM

If you have an owners manual...don't be afraid to refer to it...because it gives details as to what the warning lights mean. In this case...it is one of the most misinterpreted warning lights due to many owners thinking that the battery is the culprit...when more than likely, the battery is the VICTIM of the alternator/charging system not keeping the battery charged.

If you've UNLOCKED your OBC, I'd run TEST 9 before starting the engine (to keep an eye on the health of your battery's voltage...to make sure that it isn't dropping below 11.89 volts...which means that the alternator/charging system is killing the battery)..and while the engine is running to see if the alternator's output is staying above 12.8 volts. If the alternator is not putting out enough voltage to recharge the battery, it will eventually kill your battery and leave you stranded on the side of the road.


NorCalGOAT 02-25-2013 04:08 PM

Qsilver7 you called it " If the alternator is not putting out enough voltage to recharge the battery, it will eventually kill your battery and leave you stranded on the side of the road" this morning I was on my way to repair shop and I was 1 mile short stranded on the read. And yes alternator $900 repair now.

QSilver7 02-25-2013 09:25 PM

Sorry to hear that you got stranded. Hopefully they will put your battery on a charger while installing the alternator. If you unlocked your OBC, keep an eye on the battery's voltage because once it's been deeply discharged as it has...it is permanently damaged and may not recover, or have difficulty keeping a charge....and you may find yourself needing a jump after spending the money for a new alternator.

Just remember to check the battery BEFORE starting the engine, or a few hours after shutting down so that there isn't a "surface charge" on the battery...which will not really give you an accurate indication of its health.

Good luck.

penny hochhalte 03-02-2013 11:01 AM

I hope this will help me, I bought a 2002 X5 about a year ago, has about 80 thou. My battery light did come on and all the other fail safe lights, deducted the battery which was the arigonal battery was going bad, so we thought , changed it, all lights went off but the battery, other then taking pff all the fun stuff, and the expence of altinater could their be anything else not as hard to get to that we dont know of, or does the battery have to be reset also ? help please

NorCalGOAT 03-02-2013 01:31 PM

Have the alternator check and good luck


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