Dimmer switch?

Main problem: The gauge cluster does not illuminate when I turn on the headlights.

Additional problems/observations: The gear selection indicator (P, R, D, etc...) lights, on the cluster, work as long as the head lights are not turned on. Once I turn on the headlights ALL illumination from the cluster disappears.

I jumped the Black and Red cables on the dimmer connector but ONLY the gear selection indicator light, on the cluster, illumated and very faint.

Should I replace the dimmer switch or does this seem like a different issue?

Locate your dimmer knob and see if it works when headlights are on.

My last 3 Civics have the 2 different levels/settings option.

Stop shorting wires... or it could get $$$$$