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1993 BMW 525i charging system - alternator battery

Tiny
NICKELS33
  • MEMBER
  • 1993 BMW 525I
  • 6 CYL
  • AWD
  • AUTOMATIC
  • 143,678 MILES
I am having issue.93 bmw 525I; car died; took alternator off had checked at autozone; passed. Took battery;failed; purchased new one; car drove fine for couple days; died again; was told it was alternator; replaced alternator with a rebuild and recharged battery; it died again after a day; what else could it be; electrical guy said that he checked all point of alternator while on car and its grounded but not giving off the voltage to recharge the battery.I just had alternator checked and it passed. What could it be?
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Friday, May 14th, 2010 AT 6:43 PM

2 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
There is something that is being overlooked here. Start again and check ALL power and grounds, is the connection at the starter solid? Is the ground to the right motor mount bracket from the frame rail tight? Is there a voltage drop from the battery to the alternator? Is there battery voltage at the alternator with the key off? Power flows from the battery to the starter to the alternator. Battery voltage when running should be about 14 volts. The blue "field" wire should be checked for proper torque.
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Saturday, May 15th, 2010 AT 9:09 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Hey! Doc nice to see you again-Don't see you again have a happy Holidays my friend, take care and God bless-razzy
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Saturday, November 19th, 2011 AT 8:11 PM

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