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Messages - 2lobird

Electrical Tech / Alternator will not charge battery

July 18, 2008, 10:58:02 AM

I just had the same problem on my 1988 5.0- my issue was the green/red striped wire that is supposed to supply 12v key-hot to the regulator failed for yet to be determined reasons. Take a voltage tester and make sure all the wires to the alt are performing their intended function (12v constant, 12v Key-hot, Ground, etc).