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Old 09-01-2009, 01:08 PM   #1
m3mannie
1st Gear Newbie
 
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Join Date: Jul 2009
Location: Canada
Posts: 5
Battery

I bought a new battery for my e30
and it died on me last night while i was driving
is it possible that there is something wrong with the alternator or the battery??
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Old 09-01-2009, 01:40 PM   #2
InfiniteDice
14 Years with the E30
 
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Join Date: Sep 2006
Location: St. Catharines
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Test the voltage at your cig lighter when you start the car... should be about 13.4 or something. If it's 12v or lower... the alternator isn't charging. Try reving it to 2.5 - 3k.... that will charge the field in the Alternator and it will then come up to 13.X.

If this is the case, then check small wires on the alternator. One of them is to charge the coil, if that is loose or corroded then it may not charge.

Alternatively it could just be your voltage regulator on the alternator... a separate part that can be bought for 20 - 30$.

Good luck.
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