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Fuse Box fun and more...

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Athame57:
 I recently had a new harness (loom) fitted and new battery too. I soon needed a new rectifier and that was done. Then a black out on the street that turned out to be a couple of blown fuses, something the AA man overlooked  :o  , my local bike shop sorted that out. A new condenser has been ordered as I saw a one on ebay. So I'm working on my electrics but not fast enough it seems. This morning all was dark when I turned the key. I noticed my headlamp switch was in the on position from when I last rode a couple of nights ago, I didn't see that doing any harm but took my battery in for a check in case, all was well with that.
I take off the side panel over the fuse box area and gave this tiny black square thing (arrowed in picture) a good press with the finger and all lit up fine. voom voom off I go.  Next time I try to start the bike down town all was dark again. Pushing and pressing the same thing didn't help this time, so I go to check the fuses, I took out the lower most one, it looked fine, put it back in and all lit up again. When I get home I experiment a bit and find that taking out that little black square didn't make the bike go dark ...so what happened his morning. What could be causing this. Is changing the fuse assembly a good idea or should the next move be something else?

hairygit:
That little black block is the diode of the starter safety circuit. That would NOT cause the total electrical failiure you described. Pressing it probably moved a loose/dodgy connection elsewhere on the bracket/plate. If the fusebox wasn't cleaned/checked when the loom was changed, that will be prime suspect.

taysidedragon:
Looking at the state of the regulator box and connectors I would check and clean the connectors and earthing points. Make sure battery connections are tight as well. You must have a loose or bad connection somewhere. Just be patient and methodical and work through them all. 👍

Nurse Julie:
+1 with the above. That looks pretty rusty around the whole area and looks like it needs a good sorting out to fault find and prevent problems in the future.

PatM:

--- Quote from: taysidedragon on October 07, 2018, 05:42:46 PM ---Looking at the state of the regulator box and connectors I would check and clean the connectors and earthing points. Make sure battery connections are tight as well. You must have a loose or bad connection somewhere. Just be patient and methodical and work through them all. 👍

--- End quote ---

Someone critised some pictures i put on FB of my exhast mounts,in reply to a query 'what goes where, help please??'

 'Wow= your bike looks well-used!' comes back a reply...= Guilty as charged, the underside of my bike was and is a bit grubby, but im not putting it into a show!

My point is that electrics are not forgiving to rust/oxidisation and general age-related crud. Bullet-connectors were trouble when new and wet, let alone 40-years old,corroded and oxidised. You seriously need to have a bit of a tidy-up of the 'electrics' cupboard on your vintage Honda. They may be simple machines, but trust me- they are a git to solve electrical issues and will fox the Best on here from time to time.

The fuse-box simply unplugs and probably needs to be replaced - the spring-contacts loose thier springy-ness and the fuses- as Ive found out- crack internally or the 'solder' breaks. cary a packet of fags and it'll 'get yer home'. no, dont start up smoking as Id nver recommend that :-)

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