Warning light on & no manual

I have a 1999 Ford Windstar and a amber warning light (not check engine) came on and I don't have the owner's manual? It's a circle with a little square on top and a exclamation point in the center and it's surounded with dashes (like the sun)... It's in the lower right next to the door ajar light. Can some one tell me what this means?

It is the icon that tells you that you have a burnt out bulb somewhere.

Thanks! It was a burnt out break light.....