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Dead Battery issues 200 1987

posted by  Jorrell on  Tue Nov 27 13:29 CST 2007
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last visit: Thu Dec 27 03:00 CST 2012
[RELATED]

Will:

The only way to know for sure if the alternator is 100% is to clip a current meter on the big alt line with the car running and the lights on, rev up to about 1500RPM. If I recall correctly, the alternator is an 80A unit. I have run into many a 89 and later alternator that seemed to work fine in the summer, but kill batteries as the headlights are used more and more. Why? Simple answer, all of the bad ones had a bad diode bridge that resulted in the alternator peaking out at 30A rather than 80 to 90Amps!

Have your friend drive it to an Advance Auto shop and have them check it, if all is good then it might just maybe be a harness issue.

jorrell
--
92 245 250K miles, IPD'd to the hilt, 06 XC70, 00 Eclipse custom Turbo setup...currently taking names and kicking reputations!






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