gauge light not working

my speedometere gauge won't light up at night and i don't know how fast im going...all the other lights work...just not the speedometer, fuel gauge, and the temperature gauge. the dimmer switch works too and we've tried changing out new bulbs. any other suggestions? it's 99 civic ex

Blown fuse somewhere? Bad connections at the cluster?

could you possibly find me a fuse panel cover? i don't know which fuse it is! there's like 30 of them lol