I've been having some unusual problems with a 1989 MC19; whenever I turn on the left side indicator, the rear lights and instrument lights shut off (and turn back on as soon as the switch is reset).
When I first bought the bike this only happened with the instruments, however a few months back when I dismantled the front end to fix a few things it started happening with the rear lights too. Thankfully this doesn't effect the break light circuit, so as long as you've got your foot on the brake you can be seen making left turns.
This would suggest a short circuit somewhere, but I'll be damned if I can find anywhere obvious. The only clue is the bike used to be running 55/60w H4 globes with standard wiring—which may have already shorted something. I swapped these out for LEDs as soon as I realized they were H4s, then upgraded to an Ecliptech light driver (problem not affected by either of these modifications).
Does anyone have any suggestions on how to localise this? My loom is pretty shite looking at the moment, but I was hoping to clean it up when I repair this issue (see pictures).
When I first bought the bike this only happened with the instruments, however a few months back when I dismantled the front end to fix a few things it started happening with the rear lights too. Thankfully this doesn't effect the break light circuit, so as long as you've got your foot on the brake you can be seen making left turns.
This would suggest a short circuit somewhere, but I'll be damned if I can find anywhere obvious. The only clue is the bike used to be running 55/60w H4 globes with standard wiring—which may have already shorted something. I swapped these out for LEDs as soon as I realized they were H4s, then upgraded to an Ecliptech light driver (problem not affected by either of these modifications).
Does anyone have any suggestions on how to localise this? My loom is pretty shite looking at the moment, but I was hoping to clean it up when I repair this issue (see pictures).

