Ford 1996 Windstar Manual page 193

Features
will return to the normal state after a short delay. The delay
starts when the glare goes away. The delay prevents excessive
changing of the mirror as traffic moves behind and around the
vehicle, or on rolling hills and curves.
The electronic mirror measures the brightness of the light
coming in from the rear of the vehicle. It automatically makes a
correction in the glare state. The mirror may be turned off in
either the normal or non-glare position.
There are two light sensors (photocells) in this mirror. The
sensor that detects rear glare is located inside a window in the
upper RH corner of the mirror. The second light sensor which
determines outside light level is located on the backside of the
mirror case.
One important safety feature is that the mirror automatically
returns to the normal position whenever the vehicle is placed in
R (Reverse) (when the mirror is in the ON position). This
feature ensures a bright clear view in the mirror when backing
up.
To turn on the automatic mirror, have the key in the ON
position and push the ON button once. The light in the center
of the button will light indicating the mirror is on. To turn the
mirror off push the ON button again.
The mirror can be temporarily darkened, if wanted, by pushing
the Dim button. After releasing the button, the mirror will
return to the previous operation mode after a short delay.
Illuminated Courtesy Mirror (If equipped)
Your vehicle may have illuminated courtesy mirrors on the sun
visors. You can turn on the lighted mirrors by lifting the mirror
door cover.
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