[vince1]

Yup, the electrical guys will probably show you a wiring diagram of how it is supposed to work. I suspect you are not getting voltage to somewhere on the regulator or on the up side the regulators for these things are dirt cheap. Mine was overcharging and from someone on this forum I found that it was probably a bad ground between the regulator and alternator and it was. In the end I had an extra alternator with internal regulator which I used and donated the original to a local re-builder.