Ford 1998 Windstar Owner's Manual page 29

Anti-Theft Active Indicator Light
This indicator is used in the optional Anti-Theft System. See
"Anti-Theft System" in the Controls and Features chapter of this
Owner Guide.
The anti-theft active indicator light
Air Suspension Warning Light
The air suspension warning light
The warning light for the Air Suspension indicates one of two
things:
The service switch (located in the jack storage area) is in the
1.
"off" position.
A system malfunction has occurred electronically disabling
2.
Air Suspension function.
NOTE: If the switch is returned to or in the "ON" position
and the light does not go out after recycling the
ignition switch OFF/ON, the Air Suspension should
be checked by a qualified service technician.
Instrumentation
27