1997 Chrysler Town and Country Odometer, Clock, Gear Indica

Electrical problem
1997 Chrysler Town and Country Front Wheel Drive Automatic 146000 miles

When I use the dimmer switch for the instrument display (speedometer, tachometer, etc) everything dims except the odometer, clock, gear indicator, and overhead console display lights. They remain unchanged and distractingly bright at night. I could have sworn that they use to dim in the past. Are they supposed to dim and what needs to be fixed if they don't? I took the vehicle to my Chrysler dealer and they said they replaced the dimmer switch with something billed as a Headlight & Foglight. Kit (they said the other instruments lights were flickering as they dimmed - I hadn't noticed.) It did not fix the problem (I had explained that my concern was the bright odometer, clock, etc display lights when I spoke to them before the kit was installed.) When I spoke to the repair tech after discovering that the problem hadn't been corrected (and after paying for the kit), he did not know if the odometer, clock, etc display lights were even supposed to dim!
Thank you for your help.