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1992 BMW 325 altenator/ battery

Tiny
KNIGHT21XOX
  • MEMBER
  • 1992 BMW 325
Electrical problem
1992 BMW 325 6 cyl Wheel Drive Type unknown Automatic 151000 miles

I have a 1992 325i and the altenator was bad so I changed it. I then charged my battery becuase I was dead as could be. After it was charged I put it on and it started right up. I decided to see if I was running off the battery and I pulld the positive wire off and the car shut off. What could be wrong? Or is that just what will happen?
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Wednesday, February 20th, 2008 AT 10:03 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Try this read the battery with a voltmeter before you start it -it should be 12.4volts or better-if not battery is still weak. Next start the car up and read the voltage while engine running and headlights/heater On -it should be 13.2-15.5volts not in this zone the alternator is not putting out or the battery is not taking it.
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Wednesday, February 20th, 2008 AT 10:25 PM

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