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Teds new project a CB500 K1 mostly version 0.5 circa 1972.

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Bryanj:
You have my number if you are sat in front of it scratching whatever you scratch

McCabe-Thiele (Ted):

--- Quote from: Bryanj on September 05, 2023, 04:03:45 AM ---You have my number if you are sat in front of it scratching whatever you scratch

--- End quote ---

Thanks Bryan I have that in reserve  bud- I'm a stubborn old bloke with Electrics with a slow learning dip before I see a hint of a curve on the horizon.

Like I say to my brother about house electrics there are only three wires how hard can it be -assuming you are not colour blind.

McCabe-Thiele (Ted):
Plan B

Until I have the sutures removed from my right shoulder shoulder I am leaving the cylinder head assembly & fitting for a couple of weeks so instead I'm biting & bobbing with the wiring again.
 I have following Bryan's wiring tips with some success. (Early Days)

I have undone the switch halves from the handlebars  to try to work out what goes where inside and made quite a bit of headway I think.  As yet the pass switch is not functioning but everything else seems to now work.

I no longer have the front beam coming on with the switch in the far right position - parking light I think - trouble is just the rear lamp illuminates not the front side light. Is this how these old bikes were wired up?

Oddjob:
Seem to recall the front side light also lit up on park position Ted.

There should be 3 wires going to the pass switch, light green, dark blue and black. If you have the light green and dark blue whatever the other wire is goes to black on the loom. It should work then.

McCabe-Thiele (Ted):
I think you are right the front sidelight should illuminate as well.

I'll look at the Pass switch again as I have some spare wires atm.


Update: 
I had a bit of a Eureka moment when I went to bed last night, this morning I changed the way the Horn function operates (as hinted by Bryan) so there is an earth wire at the horn end instead of the button earthing it. The black wire now supplies power to the horn instead of being an earth connection (much like the starter button). When I tried it this moring the Pass switch now works as does the Horn.  I am now left with just one unused wire from the right handlebar switch - Black/blue trace. The original right side switch had 6 wires the new switch has 7 wires so not an issue to have a spare wire. I have a couple of wires that seem to contradict the matching colours I would expect - I will take a look at those & see if it changes anything.

Only very minor  issue left is the front side light does not come on in the park position only the rear one - if I do not find a fix for that I can live with it as I have never used parking lights on a bike anway. Seems strange really as the front & rear side light are on the same circuit in the P light switch position. I would have thought that if the Park light position on the main ignition switch sends power to the rear lamp that it would also power the front sidelight - clearly it does not.

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