No instrument panel lights or radio light

Double check.

1...Must have either park lamps or headlamps on, AKA switch pulled out
2....Twist and wiggle the dimmer knob and vigourously while watching for flicker of lamps
3....Make sure switch is "to the left" considerably and re-check for power on the tan, at the fuse.

Now when I say "dimmer" you DO know I am referring to the built in dash lamp dimmer in the headlight switch, and not the floor "dimmer witch"?