problem with lights

Hi
I am having problems with the lights on my 75 st70, Does anyone know how to test the output of the lighting coil from the three wires coming out of it to the light switch (yellow pink and green) my headlight stopped working completely a week after mot from a restoration, I was only getting 4 volts going into the rectifier and the light switch seems to work fine when tested with a battery and headlight works, so I figured the lighting coil must be at fault so I have had it rewound and still no joy, I am wondering if maybe the flywheel is at fault but would like to test the output of the lighting coil before the headlight switch but not sure how to, any help would be much appreciated.
Thanks Graham

If your ignition is working I don't think it can be the flywheel at fault.
The 3 outputs- Green, pink, and yellow (C1-C2-C3 at lighting switch)are utilised as follows :-
Switch off -Green to rectifier connected to charge battery
Pos. 1 - pink connected to operate side and tail lights +charging
Pos. 2 - yellow connected for headlight + side lights +charging
This info may narrow your search for the problem
Check the output from these wires with a test bulb
Check the winding is grounded OK at the stator
Cheers,
Dave

Thanks Dave
I found the problem the guy who did the rewind had trapped a wire behind it when he put it back on the stator plate so it was shorting out.

That was pretty careless !
thanks for letting us know the problem is now resolved.
Cheers.

Hi
Its good when members let us know when issues are resolved
Regards Tufty

Hi regarding these three out puts, green, yellow and pink, do they have the same volts from the lighting coil, my three wires two have 5/6 volts and one as 10 volts, thank you