> I'm really not sure how this could be done any differently, but if I've > made a mistake, I'm all ears. :) Have you tried putting the Motorola alternator back on to see if it still works? From your description it sounds like you have everything connected properly. What doesn't make any sense to me is how your 'dead' wire could make the Motorola work at least half way but not John Hervey's. Maybe that dead wire is a new problem that started during the swap. The wire connects to the "ignition-on" through a light bulb in the dash. Theoretically, when the alternator fails, it will ground out this wire enough to illuminate the bulb. So maybe your bulb has an open filament. And then when you instead tie the alternator's feed to a low impedance B+, it tries to ground it out to warn you there is a problem. But instead this cooks whatever is left of the regulator (in the alternator) while it makes a whistling noise. (This is just a theory; I could be wrong.) I venture a guess that you have two problems: a bad alternator and something wrong with your light wire. Also, check your grounds. John Hervey stands behind is products and is sure to have an answer for you that probably makes my explanation a moot point. Walt Tampa, FL