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1991 Eliminator - Pulled the dash to change my AC evaporator. After reinstalling it, I have no gauge cluster lights (driving/fog lights don't work either but that may be a separate issue). Checked the fuse (#8 in the fuse box, 5 amp), it was good but put another good one in just in case. The fuse is tight in the box and contacts are clean. Rotated light switch knob fully in both directions with parking lights on and with headlights on low and high with no result. Also noticed my ash tray courtesy light doesn't work. Pulled the gauge cluster back out to check the connector and found it was securely seated as it was when I put the cluster in the dash. I checked and the connector will only fit one way. Interior lights, under dash courtesy lights, mirror courtesy lights, headlights, tail lights, brake lights, parking lights, back-up lights, flashers, clock, radio, and cigar lighter all work and the parking brake warning light works. Didn't notice if the upshift light worked or not. Put my meter on the fuse connectors and I don't have 12 V to either side with headlight switch in any position. Is it safe to assume the power for the gauge cluster lights comes from the headlight switch? I can't see the back side of the headlight switch, even with a mirror, to see if there is a loose connector. Any ideas what to look for and/or how to fix this? If it involves pulling the dash again I'll probably do without gauge cluster lights for a while. However, I do now have AC!