For starters, when I first bought the jeep, the radio nor interior lights worked. I eventually figured out the wiring and got both to work. However, the backlight does not work on the radio display. I looked up under the steering column to inspect the relay center and saw that only two relay locations were open. I could be wrong but I don't have power anything, I only require two slot to be filled; one for the radio illumination and the other for the horn. I thought maybe the relay could have been bad so I swapped it with the horn relay, but that didn't help and the horn still works. What else could cause the display to not illuminate, before I decide that it's the radio that's at fault?

All of my fuses are good!

 

IIRC there's an illumination wire in the back. If you have voltage there, the problem is inside the radio.

 

Oh yay! So, my relays center is not per any "'95 diagram", that I have. I have a '95 FSM and according to that, my relays do not coincide w/ any of the diagrams. I believe my fuse box is the same.