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Author Topic: Alternator Diagnosis  (Read 2536 times)

Offline rdhack

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Alternator Diagnosis
« on: September 05, 2007, 12:09:39 pm »
Would an alternator be going out if when the AC is on the voltmeter gauge goes really low towards the red line and back to normal when the AC is off??

Any quick reply will be greatly appreciated.  1994 C10 V6 with AC
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Offline VileZambonie

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Re: Alternator Diagnosis
« Reply #1 on: September 05, 2007, 02:29:10 pm »
You need to actually check it with a volt meter. Turn the AC on and all electrical loads. Run the engine at about 2000 RPM and post output voltage. Also list voltage at idle and with all accessories off engine idling.
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