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Old 02-11-2010, 03:45 PM   #1
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Question Alternator Gauge Volt Reading...

I have two questions -

I just replaced the alternator (140 amp) in my 1999 SE.

1. What should the volt gauge read/range?
2. It is normal for the gauge to slightly move in-synch with (using) the turn signals?

Thanks!
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Old 02-11-2010, 06:11 PM   #2
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How old is your battery? At idle the alternator does not charge the battery so you are running off only the battery, I would think if the battery is old then that might happen but with a good battery and not too much draw from the battery I wouldn't expect to see a fluxuation
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Old 02-11-2010, 11:26 PM   #3
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Check this test out by Dan. This should answer your question.


https://www.gmforum.com/showthread.php?t=288335
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Old 02-11-2010, 11:41 PM   #4
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Was this the write up you wanted? The link you posted went back to this thread.
https://www.gmforum.com/trouble-shooting-test-procedures-141/testing-charging-system-279494/
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Old 02-12-2010, 12:15 AM   #5
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That was the one Dan good catch man.
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Old 02-12-2010, 01:54 AM   #6
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Thanks!
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