SOHC.co.uk Forums > CB500/550
CB550 F2 Wiring
Bryanj:
Its been a few years since i did a rats nest, it should have a brown connector
Neilw:
--- Quote from: Oddjob on September 05, 2026, 03:02:49 PM --- It's possible it's hiding in plain sight but lost amongst all the rest.
--- End quote ---
This, I had plugged another wire into the connector! Can't blame anyone else for this one lol!
Neilw:
Just a quick recap - I removed all block connectors, cleaned most and replaced a couple as they were in a terrible state. I fixed some rather dodgy-looking wiring bodges and generally gave the wiring a good clean, wrap and overhaul. I've also installed a new bladed fuse box, using instructions from Hondaman and the old ones as a template for the wiring.
I've made sure that the earth connections to the engine block and frame were to bare metal, and now I've connected everything up.
Connected the battery and turned the key.
Hmmmm, smoke is coming from the top of the Oil Pressure sensor, so switched it off and disconnected the battery.
Not quite sure what's wrong; I've traced the wire back to the headlight nest, and everything seems to be connected correctly. So I'm assuming I have a short somewhere between the switch and the light.
Got the multimeter out and it's dead, FML, battery is flat, the one time i need it! And of course it's not a nice little CR type its a MN, which I don't have. So Mr Amazon will be delivering a couple tomorrow, so off to do some polishing on the rear wheel hub with my new Dremel.
Oddjob:
Odd one that. The sensor acts as the earth on that system so why is it smoking? It may be an internal fault on the switch itself. Try removing the blue/red wire and holding it against the engine, that should light the oil pressure light up. If it does and there is no smoking the fault is in the switch.
Neilw:
--- Quote from: Oddjob on September 06, 2026, 01:03:39 PM ---Odd one that. The sensor acts as the earth on that system so why is it smoking? It may be an internal fault on the switch itself. Try removing the blue/red wire and holding it against the engine, that should light the oil pressure light up. If it does and there is no smoking the fault is in the switch.
--- End quote ---
Blew the main fuse when I did that,
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