I recently purchased a 94 pickup with A/C & Heat. Does the control panel with the A/C, Heat, Defrost not illuminate? Or do I just need to check fuses or bulbs? Any info would be great!

 

If other instrument panel lights are illuminating, might be that your bulb is bad.
The control face snaps off after pulling the slider knobs off, and then you will see a long clear plastic light diffuser. This too snaps out to reveal a small bulb behind.
Got to be careful with these old plastic parts. I broke one or two before I figured out how to take them apart. A small hooked dental probe is handy for this work.

 

This guy is correct.

There is 1 super tiny bulb behind there that the plastic panel disperses to light up the whole panel. I've had to replace it twice already since I've had my truck.

 

Awesome! I will have to try! Thanks guys