Ford Windstar Owner's Manual page 141

The system will work with up to four remotes. Your vehicle
came with two remotes. Additional remotes can be ordered
from your dealer.
The remote entry features only operate with the ignition in the
OFF position.
The remote entry transmitter
Unlocking the Doors
To unlock the driver's door, press the UNLOCK control.
To unlock the other doors, press the UNLOCK control a second
time within five seconds of unlocking the driver's door.
Locking the doors
To lock all the doors, press the LOCK control.
If you would like a signal that the doors have been locked,
press the LOCK button again within five seconds. The doors
will lock again and the horn will beep.
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