Ford F series Owner's Manual page 307

Headlamp Bulb
The headlamps on your vehicle use replaceable
bulbs. When the lamp burns out, simply replace
the bulb, rather than the whole lamp.
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.
NOTE: If the bulb is accidently touched, it
should be cleaned with rubbing
alcohol before being used.
Do not remove the burned-out bulb unless you
can immediately replace it with a new one. If a
bulb is removed for an extended period of time,
contaminants may enter the headlamp housing
and affect its performance.
Parts of a headlamp
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