01-29-2023, 07:49 AM
It works again! Turns out that in addition to the ignition wire this alternator needs a direct battery connection. While it was connected to the battery isolator, (essentially a diodes) there is no voltage on the input terminal back from the battery. A simple jumper to the alternator + terminal provides the excitement voltage and voila it cranks out 14 volts!
Tim K 1986 Classic 40’ #121