On my 08 uly, there are 5-6 ground wires that connect to the neck stem with a screw, I lost signals, then my grip heaters, and finally headlights, screw was tight, no corrosion, checked it multi times, cleaned/WD40 the switches, then I did continuity check, found no grounds, went back to stem screw, yep, wires were broken inside the insulation, not visibly broke, but broke none the less, Rule#1 on these bikes is check for grounding issues