Odd question. I have a 91 B2600i, and the only interior dash lights that don't work is for the AC/HEAT sliders...The light for the AC button works, and the lights for the fan speed control and temperature dials work, but NOT the lights for the slider selections. Are there multiple bulbs behind all this running that show? Or is there just one? Because if it's just one, there's some issue with the slider control panel causing the lights not to work. I am not going to replace that panel, mine is in super shape (minus the light not working LOL). Any help is appreciated. Thanks!

 

It's most likely a burnt bulb there's one that twist in on the back of the ac controls.

 

Well i looked into it further, and it APPEARS there are three (3) bulbs for all that. ONE for the sliders (which is the one not working), one for the two (2) dials, and from what I saw one (1) for the cigarette lighter. Or one (1) for the lighter and dials. Either way, I'm confident enough to blow it apart this weekend and get that bulb replaced.