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sean350z
08-15-2011, 10:33 AM
Weird problem...

The voltage measured at the alternator and after the fuses is reading 13.8V when running. The voltage at the positive battery cable while disconnected from the battery while running is 13.8V. When the positive cable is on the battery voltage drops to 12.7.

I've measured amperage at the alternator output which is about 4.5A and there is not voltage drop in the circuit.

On a generic battery test, the battery passes and has stated CCA. Is it possible I have a short in the battery or one of the cells is kicked? I have an Optima Red.