[Lynn Eades]

Stewart , A generator should be polarized when being fitted to a vehicle,because if the permanenant magnets are polarized the wrong way. (polarity)then when you run the vehicle up the points will close in the regulator and when you stop the motor, the points will stay shut . which will in turn feed power to your gennie, which will try to "motor" (the belt will stop it.) and this will then burn out your gennie and your regulator.
To polarize your gennie is simple. You just connect a piece of wire to the live battery terminal ,and strike the wire to the generator "field" terminal (the small one) a couple of times.
Another thing that comes to mind is that with some generator charging systems, they require a small current flow to "excite" the
system(get it started) This is usually acomplished via the ignition warning light. If you dont have one it wont charge.
I say all this as a mechanic not an auto electrician, and this is all based around Lucas systems.-----And Ive never seen a T16 let alone what thier electrics look like