battery light at 3k rpm

PONTIAC GRAND PRIX
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LX51
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I have a 94 Grand Prix 3.1 (197K mi.) with air. Recently although the car runs great, the battery light has been coming on at 3k rpm. I brought the battery in to be checked, checked o.k. Replaced serpentine belt, and brought the alternator in to be checked. I was told the alternator was o.k. too. However, I did not tell them that the problem occurs at high rpm. Do they test the alternator at different speeds and does anyone have any ideas as to why I have this problem?
Aug 17, 2007 at 2:03 PM
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RASMATAZ
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[quote:efe9e9c8c2="LX51"]I have a 94 Grand Prix 3.1 (197K mi.) with air. Recently although the car runs great, the battery light has been coming on at 3k rpm. I brought the battery in to be checked, checked o.k. Replaced serpentine belt, and brought the alternator in to be checked. I was told the alternator was o.k. too. However, I did not tell them that the problem occurs at high rpm. Do they test the alternator at different speeds and does anyone have any ideas as to why I have this problem?[/quote:efe9e9c8c2]

Yup if you're using a VAT20/40 you take up to 2K RPM what they doing is loading it.

Recheck all the connections at the battery and alternator. Make sure the alternator is grounded good.
Aug 17, 2007 at 11:33 PM
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