Sun Visors; Using The Sun Visors; The Passenger Sun Visor - Lincoln 1997 Town Car Owner's Manual

There are two light sensors (photocells) in this
mirror. The sensor that detects rear glare is located
inside a window in the center of the mirror. The
second light sensor which determines outside light
level is located on the backside of the mirror case.
The driver's side mirror is activated by these sensors
to prevent glare when traffic is behind or around
the vehicle.
NOTE: Do not block the sensor on the backside of
the mirror (i.e., with a parking tag, car deodorizer,
etc.) since this may impair proper mirror
performance.
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.
Do not clean the housing or glass of any mirror
with harsh abrasives, fuel or other petroleum-based
cleaning products.
90

Sun Visors

Using the Sun Visors

To block the sun, move the main visor down. If
equipped with a secondary visor, move the main
visor to the side and move the secondary visor
down.

The passenger sun visor