Instrument bulb lighting...still dim

My headlight dimmer knob only illuminates my dash lights in a certain position. If I rotate it either way just a 'hair' the instrument lights go out.

Houston, we have found the problem!!!

Also, awhile back I replaced my floor mounted high beam switch and after the install the high beam indicator 'red' light illuminates when its tghe low beam is on and goes off when the high beams are on. This didn't happen with my old switch.

IMPOSSIBLE. You changed something else besides the switch. You changed the wiring somewhere. Did you change headlight wiring, change the sockets?

OR your cluster is not grounded