use a good quality srpay electrical contact cleaner, fist pull all the fuses
then spray the contact use a small brass brush to make sure the corrison is
loosened. The power for the instrument lights come from the headlight switch
on a blue wire with a red stripe. this then goes tot fues panel intrument
lamp fuse then returns to the cluster on a blue wire with red stripe. also
make sure the cluster has a good ground. sometimes when a dash board is
painted the paint coats the inside of the screw holes preventing electrical
contact. If the power is not coming from the headlight switch is may be the
dimmer (large coil of wire inside of the porcelin wheel) these are prone to
poor contact breakage and corrosion. A new headlight switch is about $25.00
from most dealers and very easy to change if you have thin wrist (haha)