My fog lights on my 94 limited keeps blowing the fuse. Can anyone think of anything that would blow the fuse?

Try pulling the bulbs and see if it still blows. Then check the wires for shorts.

My guess is either a bulb is shorted or a wire is shorted. My guess would be a wire.

Could a bad ground cause that also? Otherwise I'd also guess that it would be a short in the wires also.

Make sure water isnt getting in the lenses/housing... Thats what happened on mine until I put a thin strip of duct tape around the edge for a nice watertight seal!;)