SOHC.co.uk Forums > CB350/400
Kill Switch 400/4
Lobo:
... these wiring diagrams are a mine of information. If you know how to use them they can save you a great deal of work.
Eg, the new LH switchgear you’ll be fitting. If needing info on what the switch operation connects to where, you’ll find that bottom LHS. It shows that the switch in LO position connects the B/Y to White, in mid position it connects B/Y to both White & Blue,
And in HI it connects B/Y to Blue.
The Horn switch. In OFF (Free) ... zip. Push it and Black is connected to Green. Slide it and Black is connected to White.
And so on.
In ‘opening up’ the loom bits and cleaning the wires you can only make your whole job easier - it’s so hard to trouble shoot when colours appear from nowhere and disappear likewise.
From what I see the basic loom looks good; but if in doubt (as you dig into it) it might be worth replacing as so much of it hidden / inaccessible once embedded into its various runs.
smoothoperator:
--- Quote from: Oddjob on November 11, 2020, 08:33:08 PM ---I bought a pair of switches for the 400 four a while ago, you want me to look if I still have them, genuine switches are always better than copies
--- End quote ---
Please do, where possible I am trying to keep the bike genuine without going over the top.
smoothoperator:
I removed the right hand switch so that I could identify the black wire from the kill switch for checking continuity with the black/white from the other side of the kill switch. Still not sure why Honda used 3 black wires rather than colours as once you've fed them through the bars you wouldn't know which was which. Anyway took enough apart to identify the 3 black wires and then test the kill switch. No continuity in any of the 3 positions. Took off the kill switch and the fault can be seen in the photo I have added. There is a shoulder of plastic next to the metal contact preventing it from touching the the 2 contacts in the switch body. It looks like it has melted at some point. I've removed this shoulder and now I've put it back together it works OK. As to whether it'll work long term I don't know. The wall either side of the contact has thinned on one side, this being where the plastic must have melted to form the shoulder.
https://photos.app.goo.gl/AvCtaW7HwqH5YLcx6
Lobo:
Well done... it’s always satisfying to find the issue. Your call (obviously!) as to whether you accept the fix, but at least if you do you now know how to facilitate a bodge to get you home. (ie connect a Black to the coils B/W!)
Bryanj:
It doesnt matter about the blacks they are all power feeds to something so dont need different colours, only a problem when you get a melt like yours, which i have seen on ignition switches but never a kill switch.
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