oil pressure & headlight switch

I nurse a 91 daily driver. Tonight, will you turn on your headlights and tell me if the there is a backlight on the dash for the headlights? How many years have I had "jake", and now I notice that there is no backlighting for the headlights. Rear wiper and defog lights works on the other side of steering column. Tore the dash apart, still apart for a week now, and I cant tell/find a bulb.

Secondly, with the key on, motor not running, oil pressure reads about 30psi. Running, the OP reads about 80. Verify it is the switch on the filter housing.
I learn so much from your input
Thanks,
Kevin

yes, the sensor is on the oil filter bung.

the bulb might have fell out of its fixture.