This is an intermittent problem I've had for a long time. Sometimes my brakelights (triggered from front brake lever) do not work...sometimes they do. The foot brake does work all the time. It's driving me nuts! I recently had it looked at and the mechanic thought all it needed was a cleaning with some spray. It worked for a while but is back to non functional again. With the bike turned off, I can hear an audible click when I squeeze the front brake lever if that's any help in diagnosing this issue. A few years ago when this problem first cropped up, my dealer replaced the relay but apparently that's not the remedy either. Help? Thanks
Sounds like it is either in the wiring or the switch to the front brake lever. I would make sure the wires were making good contact and then if the problem persists I would take the switch apart to try to fix or replace the whole switch.
The front brake switch can be had brand new from Cyclemax's OEM page for $8.85. That's a cheap replacement part that will either fix the problem or rule it out as the source of the problem. For $8, I wouldn't even bother taking the time and effort trying to take apart and rehabilitate the old switch.