[Steeveedee]

In my experience, excessive voltage is due to a failed regulator. The alternator will put out all kinds of power, but the voltage regulator...regulates it. I'm seeing some differences of opinion, though. I have a '70 Truck with AC and radio, and other accessories. Nothing changes in any big way when I'm at a light with the AC on (except it gets hot, which I'm fixing with a new Cold Case radiator). Fact of the matter is that my system has less load due to using a bunch of LEDs in various places. As far as I can tell, it's the original alternator, that has yet to be rebuilt. It's pretty crusty.