Ford F-150 2010 Owner's Manual page 138

Locks and Security
2. Press and release again within three seconds to confirm that all the
doors are closed and locked. Note: The doors will lock again, the horn
will chirp once, and the turn lamps will illuminate if all the doors are
closed..
If any of the doors are not properly closed the horn will make two quick
chirps and the lamps will not illuminate.
Car finder
Press twice within three seconds. The horn will chirp and the turn
lamps will flash. It is recommended that this method be used to locate
your vehicle, rather than using the panic alarm.
Sounding a panic alarm
Press to activate the alarm. Press again or turn the ignition to
accessory or on to deactivate.
Note: The panic alarm will only operate when the ignition is in the off
position.
Memory feature (seat, mirrors, adjustable pedals and steering
column) (if equipped)
The Integrated Keyhead Transmitter (IKT) allows you to recall the
memory seat/power mirrors/adjustable pedals/steering column feature.
Press to automatically move the seat, power mirrors, adjustable
pedals and steering column to the desired memory position. The mirrors
will move to the programmed position and the seat will move to the easy
entry position. The seat will move to the final position when the key is in
the ignition (if easy entry feature is enabled).
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