yes the Alt has the voltage regulator internal. I do have a multimeter so I will give that a check tomorrow and see what I can find out. Its a 72 Super Beetle so I dont have a rear defroster, fan is belt driven on the back of the alt, AC is unfortunitly mother nature cant turn that off to save my self.. (no heat) Ill try attaching the multimeter and watch it and see what kind of fluctuations i get if any. Thanks for the ideas.