I can't find a similar thread so I'm hoping someone has some ideas about this. I normally ride with my fog lights on all the time. Last week I tried to turn them off while riding to see how my new low beam was working (I installed an Osram Rallye 65W) and when I toggled the switch to "off" the fog lights and fog light indicator light stayed on. I toggled it on and off a few times and eventually it turned off.
Then a few days ago my bike was parked with the ignition off and a good Samaritan told me that my lights were on. The fog lights were stuck on again, as was the indicator light! All the other lights were off and the ignition was in the locked position. I toggled the fog light switch back and forth which did nothing. Then I turned the ignition on and hit the start button briefly, just enough to turn the engine over but not start it. After that I was able to shut off the fog lights with the toggle switch.
I have not seen other threads with fog lights stuck on. If the problem were with the ignition circuit I would think it would affect all the lights, not just the fogs. For electrical mods on my bike I have a Diamondstar headlight modulator and PIAA 1100x driving lights, but those have both been on the bike for over a year with no issues. I have made no modifications to the fog lights.
I have an appointment with my BMW dealer on Wednesday since I have to get this fixed before a trip next weekend. Does anyone have any thoughts on where the probem might be or how to fix it?