Davanyo, I'm 99% certain this is your problem:

Have the instrument cluster out (you don't have to take it all the way out, it can just be sitting on the steering column with all the wires still connected). Look at the dash light rheostat, which is the unit right behind the knob that dims the lights. On my car it's beige. This unit has it's own fuse, and it just broke on mine last week. I soldered it back together and it works fine now. Check out your rheostat's fuse and let us know how it looks.

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'82 300TD
'77 6.9
'75 280S
'74 280
'87 Porsche 944 turbo