i have been trying to suss out what has gone wrong here.
the lighting coil i sent you was working fine when i tested it, but i think your wiring may be shorting it out?
the setup you have used to wire it is fine for a 1 wire lighting coil.
but the coil i sent you is a 3 wire lighting coil, but when you said you tested it and got 14 volts, i thought ok, maybe it will work with that setup.
with wiring up the lighting coil
1 wire goes to a coil mounting screw via a ring terminal as an earth,
1 (yellow)to the regulator/rectifier, and the other (white)to the regulator/rectifier as well
the diagram you need to use is in post #3 on this thread,
i will send you my other good used lighting coil (spare), a good used regulator/rectifier, and a new plug to fit to your wiring.
i'll post it off monday