Ford 1998 Windstar Owner's Manual page 127

Controls and Features
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 once if doors are closed
and will beep twice if any door was left open.
127