Honda-SOHC
SOHC.co.uk Forums => SOHC Singles & Twins => Topic started by: Craizeehair on January 21, 2026, 11:56:43 PM
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I’m going through the wiring on the bike and seeing what’s chopped, needs repairing etc and so far I have been pleasantly surprised.
Could anyone advise on the headlight on / off switch wiring, I. Regards to the brown with blue tracer wire?
I can’t find a wiring diagram that shows this switch or a brown / blue wire. Can anyone helps as to where does this go and what does it do?
I’m probably missing something obvious but I can’t seem to find a wiring diagram that matches?
(https://uploads.tapatalk-cdn.com/20260121/2c2b2ea80637001a5f720e0c3b55a38c.jpg)
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Probably for a 'position' light for the European market it came from.
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Thank you, I presumed it was something I wouldn’t need but I can’t find a wiring diagram that includes this switch anywhere.
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Those colours are frequently something to do with a headlamp fuse on the fours
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The brown/blue wire is the supply from the head light shell switch (terminal Hi), it supplies the common terminal to the high/low beam handlebar switch
The UK spec bikes had the head light shell switch to accommodate the city light
Look up the CD175A 'sloper' wire diagram...very similar set-up.
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The brown/blue wire is the supply from the head light shell switch (terminal Hi), it supplies the common terminal to the high/low beam handlebar switch
The UK spec bikes had the head light shell switch to accommodate the city light
Look up the CD175A 'sloper' wire diagram...very similar set-up.
Thank you, much appreciated.
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Thanks for all the help, turns out it wasn’t a huge mystery after all. The brown / blue isn’t shown on any wiring diagrams I could find and I was trying to figure out what was what with the wiring on the controls that came with the bike, these as it turns out were not factory wiring. I have some NOS controls tucked away and when I checked those there is a brown / blue wire from those, so all sorted now, it is s a feed to the handlebar switch.