Ford Windstar Owner's Manual page 18

This light indicates the engine's oil pressure, not the oil level.
However, if your engine's oil level is low, it could affect the oil
pressure. The light should come on every time your ignition key
is turned to ON or START, and should go out when the engine
starts. If the light stays on or turns on while the engine is
running, you have lost oil pressure and continued operation will
cause severe engine damage.
If you lose engine oil pressure:
Pull off the road as soon as safely possible.
1.
Shut off the engine immediately. If you do not stop the
2.
engine as soon as safely possible, severe engine damage
could result.
Check the engine's oil level. (See "Checking and Adding
3.
Engine Oil" in the Maintenance and Care chapter of this
Owner Guide.) If you do not follow these instructions, you
or others could be injured. To ensure an accurate reading,
your vehicle should be on level ground.
If the level is low, add only as much oil as necessary before
4.
you start the engine again. Do not overfill. Do not operate
the engine if the light is on regardless of the oil level.
Contact your nearest dealer for further service.
Door Ajar Warning Light
If the ignition switch is in the ON position and any door or the
liftgate is not completely closed, the light will illuminate.
If the light illuminates, safely stop the vehicle and check and
close all doors until the light turns off.
16