Insrument failure

[Teditor]

I have a situation where the Intermittent wiper, fuel gauge, speedo, Taco and temperature gauge do not work, initially a sharp hit on the dash would restore them, the other day as I was driving along they started working, next time start nothing and that's how it has stayed, everything else works OK, oh! and the airbag light stays on.

I sprayed contact cleaner into the under dash fuses, at 76 my agility is not too crash hot to get down removing fuses one by one, is this a known problem with a simple answer.

Any advice appreciated.