High-G FJR Junkie!
Join Date: Jan 2013
Location: Millgrove, ON, CA
The multi-way connector should be rearward of the steering head, forward of the engine, more or less in the middle as far as I know. As I said, I never had a Gen1 )'03 thru '05), but others have found corrosion there and had to clean it up.
In looking again at the wiring diagram, that connector services all the left handlebar switches... perhaps follow that wiring down from the switches to the steering head area... worst case, may have to lift the tank. Looks like a 13-way with 11 wires and 2 unused cavities.
It may also be possible there is some intermittent contact within the windshield switch itself, maybe take that housing apart and give it a spray with contact cleaner and work it a few times.
Keep yer stick on the ice....
2014 FJR1300A - Root Beer
2009 CBF1000A - Sienna Red