New member! I recently purchased a 2002 Park Avenue with only 50K miles. Has most options including Head Up Display which worked fine until 2 weeks ago when the projection image stopped working. Fuse is good, so ordered a dash projector, installed it...still no image. The ceiling switch seems to be working (can hear the motor run when the leveling switch is moved), but no image when the slide illumination brightness button is moved up and down. When checking the ceiling switch with a meter, there is variable resistance when the slide button is moved. If the problem isn't the projector or the control switch what else can it be? I welcome any information and suggestions.