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Hi L.A.B.,
The Zener lead is on its own. The large female spade connector goes to the Zener at the one end, back to a double crimped white spade connection which I assume fits to the rectifier. From the dbl. crimped rectifier connection the remaining lead goes to the ignition. That's the logical solution.
Correct assumption the Ig.switch is just on/off.
Correct assumption also for the brown/blue wire, doubled crimped at the ammeter, one lead back to the horn and the other to the neg. side of the battery.
Affirmative with the brown/white from the ammeter to the Ig.switch.
My main cause for confusion is the wiring diagram showing a white wire from the Zener which ends up as a double crimped brown/white wire at the rectifier

Have attatched a copy of the wiring diagram indicating my dilema in not understanding the logic of the drawing. It is this that is throwing me out.
The only thing I can assume is that it is a printing error, (which re-occurs on several of the wiring diagrams). The problem is no-one can confirm it.
I've already asked in both Canada, the UK and the US, with diffuse answers.
If as I think it is a printing error, then it's white all the way from the zener to the rectifier and on to the Ig.switch.
Appreciate your assistance , but really hoped a 1966 T120 rider could look under the seat to confirm the colours.

Regards
Gordon

Can anyone owning a 1966 T120 assist with a wiring problem
The Zener has a white wire attached, which according to the Triumph manual connects to the rectifier. The only problem is that the manual indicates that this wire ends up as brown/white at the rectifier. This fault occurs on several wiring diagrams for various Triumphs from 1963-1970.
The solid state rectifier has four lugs. 2 to the alternator, 1 to earth, but what colour is the last wire. The manual shows a double brown/white lead from the rectifier to both the ignition switch and the zener
Have a new harness and only one female blade can attatch to the zener because it is larger than all the other blades and is white.
Additionally can anyone tell me the wiring colours that should be attatched to the ignition switch, I don't mean as read in the manual.

Appreciate all assistance in this frustrating matter, additionally invite all wiring experts to give me their feed-back.

Norway doesn't seem to have any competance when it comes to wiring and veteran bikes.

Gordon
1966 T120
(Norway)

A quick story, in 1952 a  hard up mate wanted to sell me his 1,000 black shadow for £100.00, could not aford it. :-([/quote]

And you've been kicking yourself ever since?

Gordon