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  1. Voltage fluctuation is stumping me

    Here is what is going on: Voltage will (sometimes) hold at 13.8-14V on a 3 wire alt (140 amp) chevrolet 350 setup. As soon as the headlights come on, you see a voltage drop of .5-1 V, the compressor for air ride, another 1-2 V and so on. I also see a voltage drop with an increase in engine rpm...