SOHC.co.uk Forums > CB750

Fuses

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LesterPiglet:
15a fuse is from the battery/solenoid/starter to the ignition switch. I think if there's going to be a problem it's at the switch or it's associated wiring connections.

Waggles:
Update. Had a play today. Cleaned the fuse box and its block connector. Did the same with the ignition switch which I sprayed switch cleaner into as best as I could. Unfortunately I won't know if I have cured problem for a few weeks. One odd thing though there was signs of heat at one end of fuse only this kinda makes me think it could be that which was causing problem. It didn't seem dirty but have cleaned it up anyway. Could be a problem with the solder on the back of the fuse holder perhaps?

Waggles:
... well I got to work OK this morning so at least I haven't made it worse  ;D

hairygit:
Glad to hear it! The signs of melting you described are exactly the sama as I had, caused by excessive resistance from dirty contacts, causing a greater load to be drawn for the lights etc, and occasionally blowing the main fuse. After cleaning properly it never happened again, so let's hope it's the same for you

Sent from my GT-S5839i using Tapatalk 2

Bryanj:
Extra problem is every time it gets hot the plastic of the box deforms a bit and the fuse connection gets worse, unless you are a real stickler for originality a new blade type fusebox from vehicle wiring products is the best idea

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