Quote:
Originally Posted by majidmo
Hi,
My 2003 X5 3.0i a week ago started displaying red battery light intermittently.
Is the issue with Battery or Alternator? I had removed alternator 2 months ago to change washer on oil filter housing. The battery is less than a year old and was an expensive one. It did not charge when I had the jump starter connected to car over night.
I am thinking to drive it to Advanced Auto Parts and ask for test and exchange/refund if needed.
Is there an easy test to rule out Alternator?
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Owners manual says that the battery warning light illuminates when the battery is the
VICTIM and is not being charged by the alternator/charging system.
Ditto the suggestion above...you can unlock your OBC/instrument cluster and do TEST 9. In TEST 9...if the engine is RUNNING...then you are looking at the alternator/charging system's voltage. If the ignition is in position 1 or position 2 (engine NOT running)...then you are observing the battery's voltage.
To check the battery...always check it PRIOR to starting the engine or approx 2 hours after shutting the engine off. This will allow any surface charge from the car's alternator/charging system to dissipate.