mrmdmoore... xenons on my '97 are controlled by a front and rear sensor module. The front one is on the inside passenger side fender skirt near the oil filter housing. (I haven't looked for the rear one but Alldata has a diagram) It is a potentiometer with a pitman arm assembly that connects to a suspension member; it monitors vehicle height and sends a signal to the headlight adjustment motor. Check for a disconnected mechanical link on front and rear sensor.