Scrambler 1200 Xc: Oem Heated Grips Not Working

The dash indicates that they are on, but neither grip is heating at all. Anyone come across this particular fault? In these days of computerised motorcycles I naively thought that the icon on the dash wouldn't show if they are not working, but looking at a wiring diagram suggests that this is not the case!

 

OK, further study of the wiring diagrams shows that the heated grips are protected by the same fuse as the accessory socket. That fuse has blown, probably the last time that I had my satnav connected to it, so a new fuse should fix it!