1988 Oldsmobile Ciera

Interior problem
1988 Oldsmobile Ciera 6 cyl Front Wheel Drive Automatic 141 miles

I have a 1988 cutlass ciera car with 141,000 miles and none of my Dash lights work when the switch is on, but the dome lights and headlights work. Checked and replaced all of the broken fuses too. What could this problem be? Been trying to find a way to repair it without any diagnostic costs from a mechanic. Is it a simple fix, or does it have to be brought in? Is it the wiring?
June 8, 2010.

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