I am "refreshing" a John Player Norton from a very dismal state. When I got it the alternator wires were detached. There are 3 of them, red, drab greyish green, and light mustard yellow. I've been told that the JPN's had a high capacity stator but I cannot find a wiring diagram that conforms to these colors. The traditional one goes to green/white and green/yellow but I'm reluctant to guess when the colors on this conform to nothing I can find. any help out there?
#1. "RE: three wire alternator" In response to Reply # 0
If is a potted stator and you have no diagram....
I would run the alternator under 2 conditions.
wire to wire open circuit with a voltmeter.
wire to wire voltage measurement with (3) 1000ohm (delta) 3 phase setup. If equal then repeat with 10 ohm.
If it shows equal voltage in all 3 leg/leg configurations then it is likely 3 phase instead of a 3wire 2 legged/parallel single phase.
That is the determination that must be decided before connecting to a rectifier/regulator/load.