SOHC.co.uk Forums > CB350/400

headlight beam not working

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wannabay:
OK, had a quick look today
Whipped out fuse box but all connections at back look like new
Also, as the parking lightbulb runs from headlight feed, and is working, this rules out the fusebox/connections
I've got a Haynes manual with a b/w wiring diagram but what I'd really like is a colour one - I've found a link on this site to a US one but it's not the same as the UK loom - any ideas? it would be a whole lot easier following the different wires - i get quite scrambled looking at the b/w diagram!
for the moment, I've swapped the parking light feed wire (brown) into the dipped beam in the headlight shell and can turn this on/off using the P on the lighting switch
oh, and I've sorted my avatar pic
cheers

SteveD CB500K0:
The Haynes manuals only come with b/w wiring diagrams (at least, mine do) - I think those colour ones may the result of someone with a computer and too much time on their hands!

Bryanj:
OK its either the lights on/off switch fubared OR the connection accross to the dip switch unpluged ( i believe that is a rarity on Honda's in that it does not plug colour to colour in the headlamp bucket)

wannabay:
I acquired a colour wiring diagram from kojaycat.com and have just spent an hour or so going over this again.
There is voltage all the way thru to headlight bulb on both dip and main, so fuse, loom and switches would appear to be OK. Voltage measures 8.70 on dip and main feed wires in headlight shell and 10 on side light wire.
Connecting side light wire feed to dip wire lead into headlight bulb holder works dip filament in bulb; same with main wire/bulb filament.
Is the difference in voltage critical? And/or is this pointing to a difference in eg amps or resistance? It's a long time since I did physics!
And not sure I understand your comment below, Bryanj, about connection across to dip switch coming unplugged
Keep those thoughts, comments and ideas coming.
Cheers, gerry

Bryanj:
Isn't the lights on off on the RH switch and the high dip on the left hand switch?

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