I have had an intermittent issue lately where the right hand indicators would light up for no apparent reason, and not affect the operation of the left. The right would just come on and stay on, steady, not flashing.
Hmmm, sounds like a short, but where?
My first thought when looking for a culprit was also my last- the tow bar wiring. I have been moving things around in the tail lately hunting for stop codes on my cruise control computer.
Pull the seat and bags off and have a look, sure enough, the 7-core cable from the plug has come adrift from whatever was holding it to the mudguard and rubbed through on the tyre, hidden from view by the bags. The two worn wires? Right hand blinker and tail-light.
Problem solved.
Now to fix. Pull the rack and tail-light off, and what do I find? Twitched up and then cut off bits of wire (and a ring connector) taped up and abandoned in one spot, and Scotch locks at the lights. I hate those things with a passion, because eventually they will cut the wires and fail.
So I spent the afternoon sitting at the back of the bike with a soldering iron and heat shrink etc., removing them. I have also disconnected and removed the tow bar wiring and plug, and taped the others off such that they won't short on anything. Tomorrow I will get a metre of new 7-core, and a couple of connecting plugs, one 4-pin for the lights and one 2-pin for the power, brake wire, and earth. That way, I will be able to simply un-plug the wiring if I need to. I will cut a big enough hole in the mudguard to let the 4-pin through, and put a grommet in to seal it.
For those who aren't sure, this is a Scotch Lock. Tool of the devil.