Ford 1996 Taurus Manual page 312

4. Remove the bulb retaining ring by rotating it
counterclockwise (when viewed from the
rear) about an eighth of a turn to free it
from the bulb socket, and by sliding the ring
off the plastic base. Keep the ring. It is to be
used again to retain the new bulb.
5. Carefully remove the bulb from its socket by
gently pulling it straight back out of the
socket. Do not turn the bulb while you
remove it.
To install a bulb:
1. With the flat side of the bulb's plastic base
facing upward, insert the glass end of the
bulb into the socket. You may need to turn
the bulb left or right to line up the grooves
in the plastic base with the tabs in the
socket. When the grooves are aligned, push
the bulb into the socket until the plastic base
contacts the rear of the socket.
2. Slip the bulb retaining ring over the plastic
base until it contacts the rear of the socket.
Lock the ring into the socket by rotating it
clockwise until you feel a "stop."
3. Push the electrical connector into the rear of
the plastic base until it snaps, locking it into
position.
4. Turn the headlamps on and make sure that
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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