Ford Mercury Villager 1997 Owner's Manual page 121

To arm the system
1. Remove the key from the ignition.
2. Lock the doors by using either the power door lock switch or
by turning the key in either the driver or passenger door lock
cylinder. The parking lights will flash and the horn chirps
to let you know that the system has been armed. The anti-theft
indicator light on the right side of the steering wheel will
light and remain on.
Anti-theft indicator light
NOTE: If your vehicle is equipped with a factory installed
remote keyless entry system, the system can be armed
by closing all the doors and pressing the LOCK
button on the remote transmitter.
3. Close all doors. The anti-theft indicator light will stay on for
approximately 30 seconds and then flash once every 2.5
seconds.
Controls and Features
117