Ford 2003 Mustang Owner's Manual page 65

Press the remote
entry lock control
(doors opened or
closed).
Press 7/8 and 9/0
controls on the
keyless entry pad at
the same time to
lock the doors
(doors opened or
closed).
Open a door and press the power door lock
control to lock the doors.
Use the door key to lock the doors (doors opened
or closed).
If a door or the liftgate (wagon) is open, the system
is prearmed and is waiting for the door to close or
liftgate to close.
Once the doors and liftgate (wagon) are closed, the
system will arm in 20 seconds.
When you press the
lock control twice
within 5 seconds on
your remote entry
transmitter, the horn
will chirp once to let
you know that the
system is armed.
If the doors or liftgate (wagon) are not closed and
you press the remote entry transmitter twice to
confirm the doors are locked, the horn will chirp
twice to warn you that the system is not arming.
Controls and features
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