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my 81 bmw 320i has a new (this year) battery when I shut off the car the battery light comes on and stays on even with the key out. what could it be?

Submitted: 1566 days and 19 hours ago.

Category: Car

Value: $100

Status: AWAITING CUSTOMER ACTION

Answer

That's an indication of a bad diode in the alternator. I would replace the alternator. That will also killl you battery overnight.

Accepts:
Expert:	Hammer Time
Pos. Feedback:	97.9 %
Answered:	8/9/2005

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my 81 bmw 320i has a new (this year) battery when I shut off the car the battery light comes on and stays on even with the key out. what could it be?

Answer

That's an indication of a bad diode in the alternator. I would replace the alternator. That will also killl you battery overnight.

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