handsworth is exactly right. There's a spider looking thing behind the ACC control panel. A bulb is pressed into the head of the spider illuminating each of the legs. If any of the console switch lights or ashtray light work (hazard switch has its own bulb) then the fiber optic filament probably fell off from the switch or got kinked.
If it's the bulb, I think you can get to it by pulling only the radio but you'll be working blind. With the radio out, it's only a couple more screws to pull the console panel.