interior dashboard light won't come on

Check to see if there is voltage coming out of the rheostat. Sounds probable if all of your display lights are out.

Interesting. I answered this through another server and it didn't show up!

Check under the dash for a connector that may have come partially loose. This happens in my Mom's Camry every so often.

I would check your dimmer inside the car, on the dash. I have had this problem after cleaning the car. Sometimes we bump the dimmer all the way down, then nothing works! Check it out. D

Oh, no, in my case I know it's a wire in trhe connector. I have had the dimmer problem before. Real easy to fix:

Because you usually set the dimmer and forget it, it builds up (carbon? for lack of a better word? Like contacts on a switch. The contact that is normally closed gets like a build-up on it). Take the dimmer out and rub the stationary part (damn, I can't remember...I was an electronics tech, too! The part that moves is called the wiper, at least *that* I remember!) with a pencil eraser....LIGHTLY!!! Or, get some contact cleaner at Radio Shack.