1991 GMC Sonoma alternator

1991 GMC SONOMA
160,000 MILES • 6 CYL • 2WD • AUTOMATIC
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WILLIAM NELSON
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i checked voltage with a volt meter on old alternator and was ngetting around 11.5 volts with truck running..it would stop running after it run a while.i replaced it with an exact rebuilt alternator but is still doing the same thing was wondering what i did wrong..??? this model doesnt have a voltage regulator does it i coulnt find anthing that looked like one on the firewall..thanks
Feb 26, 2009 at 1:39 PM
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BLUELIGHTNIN6
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Hello
Thanks for the donation.

Your voltage regulator is built into the alternator itself, so if you have already replaced the alternator then you replaced teh regulator as well. I believe the problem lies somewhere else. Check all earth connections and have the battery heavy discharge tested (Drop tested). Let me know the results and I will follow up.



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Feb 26, 2009 at 2:05 PM