SOHC.co.uk Forums > CB350/400

Electrics

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Octavian:
Hi all, its driving me bonkers!

I was having various problems with the electrics on my 400 and the previous owner had bodged the lot and swapped wires around making it a nightmare to trace anything.  Anyhow, I have bought and installed a second hand wire loom with the correct colour wires that matches all the diagrams I have to hand.

Now it seems I have some dodgy connections, sometimes the headlight works, then it doesn

PatM:
Hi Mate- electrics are at best fickle on these old bike- Youll need to go and look at someone eleses really to go through the wiring. I have the odd fault when I take my headlamp off- as thats wher most of the wires join and split.The bullet connectors are old and loose- thats how you get high resistance and wires falling out. What part of the world are you in? need someone local- Im in Maidstone.
Id stick with the original connectors- unless you know what you are doing and can solder CORRECTLY. Theres no reason, given the sysmptoms you have described- that your bike sholdnt work ok- its just the lighting circuit and those earth wires thats sodding you about.

PatM

matthewmosse:
if really bad a dremel type wire brush can be used to clean original connectors in situ, often though it's just a case of very lightly sueezing the female connector in some pliers to slightly tighten it then reassemble the joint. Re the earths, I'd use a short length of wire with a loop connector (one with a 6mm hole) on one end thru one of the 6mm bolts on the bike in a convinient location, just clean the area with a wire brush and protect with petolium jelly.

exvalvesetdabbler:
On the original 400/4 rear indicator stalks there was a male spade connector spot welded to the back of it.  They will most likely have rusted away or broken off.  Even if you find them ,with a decent coat of paint it is difficult to get a good earth on to the indicator base.  Same for the front indicator bracket.  I ran the green earth wires straight into the indicator bases and has been problem free. The Grommet might split with two wires  so bung up the gap with silicone.

Best Regards
Dave

PatM:
Just to add something to all this- a bulb (car sidelight) and 2 wires soldered to it- with a crock-clip on one end is the best tool to find out which green wire does what- as said by the last post- the earth wires are weel shot and running a wire back to the fram may be the easiest fix.

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