iif the other dashlights are still working the dimmer could be fine...there may how ever still be a second wire comming from the dimmer that feeds the cluster.....there is a power inverter ( i think ) that feeds the uv lights in the cluster, sounds like that may be the issue....but like junkman said first things first check the switch..... hopefully someone has a schematic they can post up for youI would try jiggling that switch before I would do anything. That switch is the most likely area for a problem yo develop, unless some hack has worked on your car.
:agree:Have you tried contacting PartsTaxi? They are a forum vendor, try contacting them. I bought from them recently and they shipped pretty fast and had good prices. There's a slight possibility they have that switch in stock.