Backstory: My original 211K alternator was outputting 35-45VAC and normal DC voltage. With some input from Mopar1973Man, all I could gather was that a diode in the rectifier in the alternator was really acting up, but the regulator was keeping the DC voltage in check allowing a AC waveform through. Speed up today: I bought a new premium NAPA alternator and replaced it. The voltmeter is reading a beautiful 13.9VDC, and 25.8VAC. ETA: The standards I have read online for an alternator is .09VAC MAXIMUM, and that if you are reading over that, your diodes are screwed up. I am so confused by this. Anybody have any ideas?