Guages work but no lights to them. (speed, tach, fuel, oil, water) none of them. However, the lights (park brake, high beams, seatbelt, & blinkers) just over the steering wheel do work. Headlights, Taillights all work. Have checked all the fuses and are good.
It is fuse 10, 5Amps. Three possibilities, all 6 lamps are bad, both the pins on the speedo and instrument gauges are bad. Or door number 3, the dimmer switch is bad. Me, I'd go for the dimmer switch. It's 20 years old and available at most auto stores for 20 bucks or so. They can be disassembled, cleaned and put back in service. Before you start, get a can of compressed air and good quality contact cleaner. Remove the screws and the switch and then the plug. Carefully open the switch and clean the wiper and disk. I cleaned mine, but the disk is badly pitted, it only works in a couple of spots.
This has been going on ever since I bought it 4 years ago. When I first had it the lights worked then one night they all just went black. I thought it was the dimmer wheel but put a test light on it and its good. All exterior lights work fine when I hit the light switch so its good. All fuses have been checked ok. So started this thread and people told me to check dimmer switch. Bought new one an replaced, still nothing. Took the test light and started checking wires that went to the plug which connects to the cluster and am not getting any response. Starting to wonder if its in the wiring harness itself.