Ford Windstar Owner's Manual page 19

Instrumentation
The door ajar warning light
Air Bag Readiness Light
This light indicates that the Air Bag system is not functional
and needs to be serviced. The light illuminates for
approximately six seconds when the ignition is turned to the
ON position to verify that the indicator bulb is working. If the
light fails to illuminate, flashes continuously, or remains on,
have the air bag system serviced as soon as possible.
The air bag readiness light
Turn Signal Indicator Lights
See "Turn Signals" in the Controls and Features chapter of this
Owner Guide.
The turn signal indicator lights
17