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40 year old wiring !!!

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Nurse Julie:
Had a problem with Millie, the CB550 mongrel that Trig has built for me. The bike has got a brand new CB500 single fuse loom fitted but we used the original battery earth cable as it looked in good nick. Whilst doing the electrics on the bike, everything electric worked, including the engine firing. The other day, when Trig pushed the start button, all the idiot lights went out, no firing and after a short while the idiot lights came back on again. Now, as many of you know, wiring is Trigs least favourite subject, so he consulted with Mr Hairy who said it could be a bad earth, all checked, all ok. The only thing Trig could find was the earth to the battery seemed a bit lumpy inside the outer cable. After cutting the outer sleeve off, this is what he found....totally disintegrated copper wire. He made a new earth cable and hey presto, all tickity boo and everything working as it should do. Thanks Hairy, I have emailed you the pics.


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UK Pete:
Oh wow all hidden away ..just shows how bloody annoying fault finding can be

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paul G:
They don't call it electrickery for nothing ;) ;)

hairygit:
That's why I always suggest using a car jumplead to bypass the earth cable, poor earthing is the root cause of a lot of faults. Vibration over 40+ years has caused fatigue in the cable strands, plus water ingress has corroded them as well.

Orcade-Ian:
Wait till you start fault finding on one of these CANBUS equipped modern cars!  The wires are like the stuff spiders make webs from and the insulation is only as thick as my hair (used to be).

I’ve just repaired the loom on the bootlid of my Daimler which is only 18 years old - the wires just snapped off.

Ian

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