I pulled the light switch and cleaned it with an electronics cleaner I found at Car Quest. Seems to work a bit better but only seems to work 1/2 way through the dimming span. It could be that the contact is lost as it spans across the spring that appears to control the dimming wattage. I'm fine the way it is and will default to a replacement switch if I ever want it to fully dim. I included some photos for others who might go down this path and a video of the dimming mechanism.

Dimming mechanism

Carquest Electronics Cleaner

Dimming mechanism video


Bob

1954 Chevy 3100 5-Window
1954 5-Window COE aka "THE BEAST"
Bill Ritchie's Original Truck

Granddad's Hardware Store: Ritchie Hardware, Concord, N.C.
Bethesda, MD