The "Bomb" (Lights) Warning Light

Ok, so here's the deal. This is mostly a nusiance I think but it honestly has started to drive me slightly nuts.

'92 100 S. I have had what I call "The Bomb" (cause it looks like one of those old cartoon bombs) warning light on the dash that indicates a problem with the lights. I'm sure some of you know the one I'm talking about. The thing is I cannot get that sucker to go off. I've repeatedly checked all of the lights. Front headlights, tail lights, brake lights and all turn signals appear to work fine. I did find one high beam out, thought "Eureka!", replaced the bulb and hoped all was good.

The warning light is still on though. Do I need to clear it somehow? The manual doesn't say anything about how to clear it other than to address the problem (of course it does tend to err on the side of take your vehicle to your Audi dealer to be serviced for nearly everything).

I checked all of the fuses and they all look good (besides if a fuse was out I'd think one of the lights would be malfunctioning.) According to the manual it indicates a problem with tail lights, headlights or turn signals (any of the lights related to driving safely). I believe brake lights have their own indicator light to let you know they're out, but like I said they're working fine.

Any ideas on how I can get this warning light off? I'm starting to think some of the wiring to the sensor that tells it there is a problem is bad, but I did find the bad high beam that led me to think maybe it just needs to be cleared. I do know that my underhood (engine compartment) lamp and the glove box lamp is out, but the manual doesn't mention anything about this indicator telling you those lights have a problem.

It would just make me feel warm and fuzzy to get an "OK" when I start the car, and make me less paranoid about having to check all my lights constantly just to ensure they're actually working! Any help or insight is greatly appreciated. I'm starting to think I overlooked something quite obvious.