You have probably already checked for a blown fuse. But if you haven't done that yet, below is a list of fuse locations from the LT shop manual. Sorry I couldn't figure out how to copy the accompanying diagram.
Replacing fuses
Motorcycle fuses
– Lift the seat at the front.
• Open the cover of the fuse box.
• Replace the defective fuse.
Fuses
1 Brake-light switch, fuel warning light, fan relay,
instrument cluster, switch for adjustable
windscreen 4 A
2 Parking lights, front and rear 4 A
3 Horn, brake light, anti-theft alarm, if fitted 15 A
4 Motronic, fuel pump, diagnosis 15 A
5 Instrument cluster, on-board computer 4 A
6 Heated handlebar grips 4 A
7 Adjustable windscreen, power sockets 1
and 2 15 A
8 Radio, map-reading light, interior light for top
case, power socket for top case 15 A
9 Fan, right4 A
10 Fan, left 4 A
11 Seat heating front/rear 15 A
12 Cruise control system 15 A
Tips