ehy does my alternator charge sometimes but not all

1995 JEEP GRAND CHEROKEE
185,000 MILES
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DHRACER6061
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My alternator charges sometimes but dies out slowly or doesn't work at all. If I spray wd40 it it it seems to work for a bit but doesn't say working
Jul 27, 2012 at 4:33 AM
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DHRACER6061
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I have a volt meter hooked up at all times as the engine temp increases the voltage goes down until I spray wd40 and start it back up
Jul 27, 2012 at 5:26 AM
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ASEMASTER6371
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what is the voltage readings exactly??

Roy
Jul 27, 2012 at 10:45 AM
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DHRACER6061
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The highest is 14.3 and it gradually goes down until it won't run
Jul 27, 2012 at 5:08 PM
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ASEMASTER6371
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you most likelt have a failed alternator. remove it and take it to a parts store and have them test it

roy
Jul 27, 2012 at 5:21 PM