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new alternator fails in 1989 cadillac brougham

Posted on 2011-05-10
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Last Modified: 2012-05-11
We are are on the second alternator in a 1989 cadillac brougham.  The alternator only shows slightly over 12v volts when installed.  The voltage goes up for a while and the fades.
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Question by:kpo440
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Michael-Best earned 2000 total points
ID: 35732488
Check that the battery is good.
A properly operating alternator cannot charge a bad battery.

Also make sure the regulator and wiring + connections are good.

See:
http://www3.telus.net/chemelec/Projects/Alternator/Alternator.htm
http://www.carbasics.co.uk/How_to_test_your_alternator.htm
http://www.econofix.com/alt.html
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Author Closing Comment

by:kpo440
ID: 35735004
The wire that connects to the L terminal was hidden
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