Fried loom

[monkeyboy]

Went for an MOT today and it failed on the brake lights not working from either brake. Lifted the fusebox assembly to look at the wiring and found a section fried. It looks like the green/black and grey/yellow from the brakelight circuit has melted down. I'm trying to chase the wires back up towards the front to see if I can find good wire but so far to no avail. The 5a fuse didn't bloody blow though.

Is this common?

 

[MikeP]

My mate's 1100 suffered a similar problem but in the headlamp section. I traced the damaged wires back and was hopeful that I'd be able to just replace the damaged wires but once I got into the tight bundle, where it leads to the fuse/relay box, the heat had affected a lot of the other cable's insulation; all melted together.

Splitting it wasn't an option without replacing lots of different wires.

A new loom was too expensive but Motobins supplied a second-hand one at a reasonable cost.

Swapping them wasn't really a problem, easier to do if you remove the rear sub-frame.

(The cause was a not too neat previous repair, done by an earlier owner).

 

[monkeyboy]

Chears Mike - at least It's not just me

I've tested all the brake light sub-circuits away from the melting and they're fine. I've chased the cables as far as I can without taking the frame off and they're fried but luckily they're on the outside of the bundle so don't seem to be effecting the other functions (though I do have what feels like an intermittent fueling fault that might be related) so just to get through the MOT I'm going to run a seperate feed to the front brake switch and patch it into the loom under the seat.

I'll enquire from Motorworks about the price of a loom - I'll be swapping the gearbox soon so I could take that opportunity to install it then

Jason