Ford taurus se 2002 Owner's Manual page 206

Maintenance and care
To install the new bulb:
Handle a halogen headlamp bulb carefully and keep out of
children's reach. Grasp the bulb only by its plastic base and do
not touch the glass. The oil from your hand could cause the bulb to
break the next time the headlamps are operated.
1. Install the new bulb in lamp assembly by pushing straight in with the
flat surface of the bulb's plastic base facing upward. You may need to
turn the bulb slightly to align the grooves in the plastic base with the
tabs in the lamp assembly.
2. Install the bulb retaining ring over the plastic base and lock the ring
by rotating clockwise until it snaps into place.
3. Connect the electrical connector to the bulb.
4. Install the protective dust shield and lock the shield by rotating it
clockwise until it locks into position.
5. Carefully position the headlamp assembly onto the vehicle.
6. Hold the headlamp assembly snugly against the vehicle and install the
retainer pins straight down to lock the lamp into place.
7. Before reinstalling the bolt, make sure the retainer pins are fully
seated, and install bolt on headlamp housing.
8. Turn the headlamps on and make sure they work properly. If the
headlamp was correctly aligned before you changed the bulb, you should
not need to align it again.
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