Join Date: Jun 2009
Location: Burton, British Columbia, Canada
All the rear lights are plugged into the big connector on top of the subframe rail, R/H side.
From the manual for my year, looks like the blue/red wire is the left turn signal.I can't tell exactly with my bike I also have the BMW alarm and that is wired into the turn signals via an extra (???) connector on the L/H side.
I'll assume that you checked both wires independently???Not just the meter at both the turn signal wires only. Brown ground on its own to make sure it does go to ground. Then the + wire on its own with the meter/test light grounded at the battery.
Finding a broken wire could be an exercise in frustration....they are small 18GA and can easily break inside the casing.So check for power at the main connector under the seat. if you are lucky may only be a break in the short rear harness, you'd have to remove the tail to get at it, that's not too hard. Even luckier....some corrosion at the terminals on the same connector. I found a few greeny ones on my bike so I keep an eye out for that. There is a BMW service bulletin that recommends cleaning/lubing all the connectors on their bikes once a year. I'll settle for every couple years,I have some pretty good electrical lubes here.
Benelli 50cc at 14
Yamaha RD 200 at 16
Yamaha RD 350 at 17
Honda CB 750 F at 18
Honda V45 Sabre at 24
BMW K100RS at 27
BMW R100GS at 34
BMW K1200RS at 53