Lincoln 1998 Mark VIII Owner's Manual page 148

Maintenance and care
To install the new low beam headlamp bulb:
1. Insert the new bulb into the
socket and twist clockwise to lock
into place.
2. Pull the headlamp level and
bracket over the bulb assembly and
snap into place.
3. Insert the bulb assembly into the
socket opening.
4. Install the retaining nuts. Tighten
them 1/4 turn past finger tight.
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