Hi
I realise that this thread is pretty old now, however I have the same problem with my 2003 V11 Le Mans. The 5 amp fuse for the dash & tail light had blown. I didn't have a spare 5 amp fuse, so I put a 10 amp one in temporarily, however that also blew within 5 miles.
I'm didn't ride it in the dark after replacing the fuse, so I don't know if both dash lights work, however when I turn the ignition key to lock the steering, I have noticed that the tacho backlight comes on momentarily.
Any help would be great.
Rob