SOHC.co.uk Forums > CB350/400

Rightside Handlebar Switch 350/500

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mike the bike:
Check your wiring.  If the black/white is plugged into a black, then the coils would be picking up a permanent 12V.  If the switch is OK  the coils must be getting 12V from somewhere.
Personally, I don't like using resistance measurement for fault finding, I prefer to measure voltages.   You just need to find out where that 12V is coming from.

watty51:
Thanks for the reply Mike.

The blk/white is definitely plugged into the blk/white from the main harness.  I marked up the cables before installing new switch. I'm going to inspect everything later today and maybe get back with some readings, or hopefully with success. fingers crossed.

Have a good day

Now where's that Hammer !!

mickwinf:
just a thought and going by memory, is the coil lead (black/white) near the coils plugged into a black wire as I think there is a spare black wire in that area, that would mean that you have a constant 12v to the coils.

watty51:
As you can see the wiring was a complete mess in the headlamp.
The cables were  I think extended from some American chap to put some higher bars on even though when I picked the bike up it had flat style handlebars on. Anyhow I've cut out all the rubbish and repaired the wiring with new bullet connectors and hey presto everything works as it should...
Thanks for all the suggestions
Chuffed

mike the bike:
Dewhurst was in Cardiff as well, as were Dewhurst Vehicle Wiring.  Glad it's now sorted.   There's nothing worse than being on a rideout and the electrics go open circuit when you've got no tools or a multimeter.

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