1997 Lincoln Mark VIII Owner's Manual - Page 261

4. 5. Replace the high beam dust cap by aligning tabs and rotating clockwise 1/4 turn. Replace the sight shield. Tools required: One 6mm socket and ratchet. The Horizontal aim must be adjusted first. NOTE: The following procedure assumes that the vehicle's front structure is in factory alignment condition. If the vehicle has been in an accident requiring the front end of the vehicle to be repaired, the horizontal indicator should be recalibrated by the servicing facility. Aiming Headlamps Your vehicle is equipped with a Vehicle Headlamp Aim Device (VHAD) on each headlamp body. Each headlamp may be properly aimed in the horizontal direction (left/right) and the vertical position (up/down). NOTE: A non-zero bubble reading does not necessarily indicate out-of-aim headlamps. If your vehicle is not positioned on a level surface, the slope will be included in the level indicator. Therefore, vertical headlamp adjustment should be performed only when beam direction appears to be incorrect or a level surface can be verified. 256