I have developed the same problem with my '93 Festiva. What I found was that on the back of the instrument cluster the black plugged wire harness has 2 pins that control power (+) and ground (-) to the dash lights. What I found was there was power at both terminals, thus no ground. When I ground out the (-) the lights came on instantly. I am going to trace the ground wire to see where it is obtaining its power. I will post when I find that out. But its probably the same problem you are having. What I found was that the dimmer switch was damaged internally, sending power through the ground. Changed the switch with one from the scrap yard and it works great. Hope this helps.
Check for a brake light fuse
There is a fuse replacement to get the dash lights to work on a 1993 Seville. The fuse for the instrument panel is located in the fuse box inside the passenger side of the trunk.
Where is the fuse located that controls the inside dash lights on a 1993 Ford Explorer
fuse # 27
What would cause your fuse to blow when you turn on your lights on your 1993 mazda 323 the fuse to the tail lights on dash lights blow?
Where is the fuse locations? Interior and brake lights have gone out while attempting to replace fog lights.
it is the one in the fuse block marked inst or panel
Fuse panel. under the hood by washer reservoir
Where is the fuse box or fuse that disables the headlights and interior lights in a cadillac eldorado touring
there is a brake light fuse in the pannel you just need to look for it.
where is the heater fan located on a89 ford festiva
The fuse for the fog lights in a 1993 Ford Ranger is located in the fuse box. The fuse box is located under the hood, or under the driver side dash board.