Ford 1997 Crown Victoria Manual page 116

Locking the Doors with the Keyless Entry
System
Along with unlocking your doors, you can use
the keyless entry system to lock the doors. You
can also use the Autolock feature to
automatically lock the doors after you get in the
vehicle.
To lock all of the vehicle's doors at the same
time, press 7/8 and 9/0 at the same time. It is
not necessary to first enter the keypad code.
Autolock (With Keyless Entry if Equipped)
The Autolock feature will automatically lock all
the doors when:
the vehicle doors are fully closed
the ignition key is turned to the ON position
someone is sitting in the driver's seat or a
heavy object is placed on the seat, and
the vehicle is in any forward or reverse gear.
The Autolock feature will repeat when:
the ignition key remains in the ON position
someone remains sitting in the driver's seat
or a heavy object is on the seat
a door is opened and then closed
the vehicle is in any forward or reverse gear.
If you do not want to use the Autolock feature,
it can be deactivated by using the buttons for
the keyless entry system.
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