Tail lights and dimmer switch

On our car, the dash board lights do not work unless you jiggle the dimmer switch. This is a digital readout dashboard. Also, the reverse lights do not come on at all. Please help me. This is a 1992 Olds Cutlass Supreme. :banghead:

Dash lights: Remove the dimmer unit and see if there's anything fixable. If you can take it apart, spray some electrical contact cleaner in it. If not, try spraying it through the switch if you can. Reverse lights could be a million things; check the wiring if you can.