[rheavn]

Thanks Tom,
Just got back from a reliable "auto electric" guy who gave me the same instructions for testing whether my problem is the alternator or the regulator. He did say that since my coach has a battery isolator there is a chance that it is bad & the alternator & regulator is not sending any charging voltage because it is not recognizing battery voltage. He also advised checking to make sure the regulator ground was good. Tomorrow I'll conduct some testing.