I've decided to take the easy way out. I just got off the phone with Phil (Partsman), ordered an alternator and voltage regulator (turns out it is external). I'll just replace both and be done with it. Even if it's only the regulator that is shot, I'll feel better replacing the alternator too, because I thought I heard a slight rattle from the alternator when I was testing output yesterday. Possibly the alt bearing heading south.

Also, thanks for a great explanation of alternator dynamics. I always knew that if the idiot light burned out the alternator wouldn't work, now I know why. BTW, DC volts with engine off were 9.35, running at idle and ~2K were 9.35.

__________________
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon TDI...at least its a diesel

Non illegitemae carborundum.