I was heading south from Puerto Montt, Chile in medium rain when electrical problems hit my 2015 F800GSA (has obviously been wet many times from Dallas, TX.)

1 ALL the switches on the left grip went dead.
2. The fuel gauge quit and low fuel light illuminated
3. The low beam and BMW aux lights quit . No high beam.
4. Parking light works, and aux indicator light still illuminated (but no lights)

5. All switches on the right work, save you can NOT turn OFF the heat on the grips. But,you CAN switch from low to high heat. (The heat indicator Shows Off, but the grips are still being heated).
6. The grips stay powered ON, even with the key OFF

7. Next day the low and aux lights were working on drive to Motoaventura in Osorno.
(I had the battery disconnected overnight as the grips will drain the battery quickly)

8. Motoaventura cleared the computer codes, and claim the only error remaining is a fault in the Fuel level sensor.
They claim that the left switch cluster is fine.
They seem to think it may be a fault in the wiring harness. But, given everyone wanted to leave early today for Easter, they weren't interested in pursuing further until Monday.
I didn't get the feeling that it was something that they really wanted to tackle.

Any suggestions??

I've got 3 days to kill and was going to pull some panels and try an spot any problems with the harness (chafing, etc), and connectors.

Thanks