Ground cable?
Tight on frame and battery
Would the seat switch cause lights to stop working also ?Seat switch???
Will check tomorrowWhat's the multi meter say at the fuse box? Ignition? Sounds like a loss of ground somewhere to me.
Fusible link is good, per meterfuseable link in the 4100? not near my 4700 manual to see . is the ground dirty at all? I'd start looking at all connections and connectors.