How to Test Alternator

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How to Test Alternator

#12

07-01-2003, 11:57 AM

G-Benz

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Join Date: Apr 2001

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Quote:

Originally posted by Car Nut
Is it okay to have 15V output on the Alternator? My 1987 Pontiac 6000LE V6 battery light is on intermittently. I changed the battery already, but the light is still on intermittently.

Thanks

Car Nut

15V seems a bit high (14.4 or so is nominal, as previously posted).

I had my regulator fail on my W124 once, overcharging so badly the battery was gassing! A quick voltmeter measurement showed 17.5V at the battery terminals!!!

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