Question about 2003 Chevrolet Venture Passanger

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Check battery light stays on even though the voltage at the battery is 12.90 with engine off and 14.60 at idle ?

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Your alternator is putting out good voltage, so internal voltage regulator is working, but what's happening the Diode is what going bad, the alternator put's out ac voltage, and the Diode turn it to dc voltage, could mess up your battery and elec. system, the Diode are like a one way valve, have it checked with a alternator, battery, starter tester, most auto parts will do this for free, if Diode's are bad it will show up in there tester.

Posted on Aug 19, 2010

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