SOHC.co.uk Forums > CB350/400
Blown fuses
Nurse Julie:
If you look at the wiring diagram and trace which components are covered by the 15A fuse, that may give you a clue. By what I can see the 15A fuse only covers the starter system and its components but my wiring knowledge is not comprehensive 😊😊😊
TrickyMicky:
If I may suggest a possibility? A couple of years ago I had a similar situation with the main fuse blowing, but the bike was being ridden fairly frequently, and I had not disturbed anything electrical. I was advised to look closely at the blown fuse, if the fuse wire has parted in the middle of the glass then that indicates a short circuit. If the fuse wire has parted company from one of the end caps, then it has got warm because it is having difficulty drawing enough current. This was what was happening in my case, and I was advised to remove the fuse holder and locate the white multi-plug behind it, pull the plug apart and inspect the terminals inside. Lo and behold, after 40 years of use they had all turned a beautiful shade of GREEN! Half an hours work with a set of small jeweller's files got them all nice and clean, re-assembled and weather proofed, and no further problems!
PS. Before diving into the terminals with the files, make sure you have taken the earth lead off the battery! Regards, Mick.
Bryanj:
How many fuses are there 1 or 3(not counting spares)
Nurse Julie:
3 Bryan. The 15a, and 2 x 7a
The 15 is the main and the 2 7A are for the Headlight and Tail light.
mike the bike:
Does it blow with the other fuses (7A) removed?
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