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Teds new project a CB500 K1 mostly version 0.5 circa 1972.
mickwinf:
The sidelight issue had me scratching my head too. If the side light comes on when headlamp switch is on, but not when ignition switch is in park, you probably have wrong wire to front sidelamp. It should be a brown wire, NOT brown/white (these supply tach and speedo). I did not realise that the power for sidelight/rear lamp takes a strange path, from r/h handlebar via brown/white wire back to ignition switch terminal TL1 then to TL2 which is the brown wire, then to pilot/rearlamp. when ignition switch is in park position power goes directly to TL2 for parking. If you look on the wiring diagram i sent you it makes sense. The odd blue/brown wire you have would have gone to fusebox on 400/550 so not needed on your 500.
McCabe-Thiele (Ted):
--- Quote from: mickwinf on September 07, 2023, 01:23:36 PM ---The sidelight issue had me scratching my head too. If the side light comes on when headlamp switch is on, but not when ignition switch is in park, you probably have wrong wire to front sidelamp. It should be a brown wire, NOT brown/white (these supply tach and speedo). I did not realise that the power for sidelight/rear lamp takes a strange path, from r/h handlebar via brown/white wire back to ignition switch terminal TL1 then to TL2 which is the brown wire, then to pilot/rearlamp. when ignition switch is in park position power goes directly to TL2 for parking. If you look on the wiring diagram i sent you it makes sense. The odd blue/brown wire you have would have gone to fusebox on 400/550 so not needed on your 500.
--- End quote ---
I think you have identified my issue Mick I have the front sidelight in the same connector as the instrument lamps.
The old side light bulb holder & short harness on my 500 looks suspiciously like an old instrument light harness.
It has a moulded bulb holder at the end - the wires are green (earth) & brown/white trace.
I have that connected with the other brown/white wires in the harness with the instrument lamps.
The plain brown wire in the harness has a feed from the right handlebar P side of the switch it is black/yellow trace on my switch iirc.
I will need to put an extra connector on this to siamese the side light into the feed from the P side of the switch. I have just done my first fit of the LED headlamp unit into the bowl spreading the wires evenly so the light unit fits okay. There is plenty of space as my LED head lamp unit is quite shallow.
I will try that in the morning and report back.
McCabe-Thiele (Ted):
Just done a temporary connection with some wire jammed in a connector - it all works correctly now so in the morining I need to solder in the right type of connector.
Thanks Bryan & Mick for your help - now sorted!
Laverdaroo:
Top work Ted, well done mate
Sent from my iPhone using Tapatalk
McCabe-Thiele (Ted):
Thanks Roo it would have taken me longer without the fantastic help here. Electrics are hard to diagnose remotely. 👍👍👍
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