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1993 BMW 740 car will not charge battery

Tiny
YORTMAIER
  • MEMBER
  • 1993 BMW 740
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I recently had a new battery, spark plugs, crank sensor relay, installed in my vehicle. After one day from leaveing the shop the vehicle completely died suddenly. I was told that it must be my alternator; after installing this, the same thing happened the next day after picking the vehicle up. Obviously I was just running off the juice of my battery. Does anyone have any suggestions?

thanks!
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Saturday, May 10th, 2008 AT 1:22 AM

2 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

First thing to do is make sure that the battery is indeed serviceable and capable of accepting a charge, then check the alternator charge rate. Do this first.

Mark (mhpautos)
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Saturday, May 10th, 2008 AT 1:27 AM
Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
I suggest checking for a key-off draw at the battery, it should not exceed 50 milliamp. I also agree with Mark, check for battery condition and alternator output.
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Saturday, May 10th, 2008 AT 10:02 AM

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