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Had o known these were failure prone I would have replaced it with a GM alt in the first place. As it is I believe I have the regulator wired incorrectly. if anyone has a diagram of the internal wiring that’s better than the TM which does not include it that would be great. I do t really want...

I have an 83 M10a with the Prestolite alternator on it which o believe to be the same as the 900 series trucks. I had a battery with two bad cells in it and lost the voltage regulator. It was overcharging. Chared parts in the regulator. I replaced the batteries, fixed some connectivity issues...