1999 CADILLAC DEVILLE Owners Manual

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2-45 Cornering Lamps
The cornering lamps come on when the headlamps or
parking lamps are on and you signal a turn. They
provide more light for cornering.
Twilight Sentinel

This control is next to the
headlamp knob. It
automatically switches the
lamps on and off by sensing
how dark it is outside.
To operate the Twilight Sentinel, leave the lamp knob
off and move the TWILIGHT control to any position
but OFF.If you move the control all the way to the right, the
lamps will remain on for approximately three minutes
after the ignition has been turned to OFF or LOCK. If
you move the control so it is just on, the lamps will go
off quickly when you turn the ignition switch out of
RUN. You can adjust the delay time from only a few
seconds to three minutes.
If it's dark enough outside and the Twilight Sentinel
control is off, a HEADLAMPS SUGGESTED message
will display on the Driver Information Center (DIC).
This message informs the driver that turning on the
exterior lamps is recommended (it's become dark
enough outside to require the headlamps and/or other
exterior lamps). Turning on the Twilight Sentinel, the
headlamp switch or the fog lamp switch will remove the
HEADLAMPS SUGGESTED message.

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2-46
Light Sensor
The light sensor for the DRL and the Twilight Sentinel
is located in the center of the front defogger grille. If
you cover the sensor, it will read ªdarkº and the lamps
will come on.
Exterior Lighting Battery Saver
If the manual parking lamp control has been left on, the
exterior lamps will turn off approximately 10 minutes
after the ignition is turned to LOCK or ACCESSORY.
This protects draining the battery in case you have
accidentally left the headlamps or parking lamps on. If
you need to purposely leave the lamps on for more than
10 minutes with the ignition in LOCK or ACCESSORY,
turn the manual control knob off and then back on. To
delay the lamps from turning off, see ªTwilight
Sentinelº in the Index.
Interior Lamps
Instrument Panel Intensity/Brightness
Control
The digital displays automatically dim when it becomes
dark outside and your lights are on. When it's dark, the
brightness control can be manually adjusted by turning
the lamp control knob counterclockwise to dim and
clockwise to brighten the lighting. The digital displays
automatically brighten when it becomes light outside,
although backlighting will remain active at the selected
brightness as long as the lights are on.

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2-47 Courtesy Lamps (DeVille Only)
The courtesy lamps are located in the roof in the rear
seat. These lamps come on with the control lamp knob
or when any door is opened and it is dark outside.
Illuminated Entry
The illuminated entry system turns on the courtesy
lamps and the backlighting to the door switches and to
the lamp control knob when a door is opened or if you
press a remote keyless entry transmitter button. Since
the illuminated entry system has a photocell, this means
that it must be dark outside in order for the courtesy
lamps or backlighting to turn on. The courtesy lamps
turn off approximately 20 seconds after the last door is
closed or after the ignition key is placed in the ignition.
Parade Dimming
This feature prohibits dimming of the digital displays
during daylight while the headlamps are on. This feature
operates with the light sensor for the Twilight Sentinel and
is fully automatic. When the light sensor reads darkness
outside, the digital displays can be adjusted by turning the
lamp control knob counterclockwise to dim and clockwise
to brighten lighting. Backlighting to the instrument panel
will turn on regardless of light conditions.
Reading Lamps (DeVille d'Elegance and
DeVille Concours Only)
The reading lamps are located in the roof. These lamps
come on automatically when any door is opened and it is
dark outside. For manual operation, press the button to
turn them on. Press it again to turn them off.
If the reading lamps are left on, they automatically shut
off 10 minutes after the ignition has been turned off.

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2-48 Map Lamps
These lamps are located in the front overhead panel.
Press the button to turn them on. Press it again to turn
them off.
Inadvertent Power Battery Saver
This feature is designed to protect your vehicle's
battery against drainage from the interior lamps,
trunk lamp, glove box lamp, cigarette lighters or the
garage door opener. When the ignition is turned off, the
power to these features will automatically turn off after
10 minutes (three minutes if a new car has 15 miles
(24 km) or less). Power will be restored for an additional
10 minutes if any door is opened, the trunk is opened or
the courtesy lamp switch is turned on.
Storage Mode Personalization
This feature is for long-term use and must be
programmed through the Driver Information Center
(DIC) while the ignition is in RUN. Storage mode
personalization protects the battery by placing your
vehicle in a storage mode so that the radio, amplifiers,
instrument cluster and remote keyless entry will not
drain the battery over a long period of time. For
programming information, see ªMemory and
Personalization Featuresº in the Index.

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2-49
Mirrors
Electrochromic Day/Night Rearview Mirror
with Compass
Your vehicle has an electrochromic inside rearview
mirror with a compass.
When set in the MIRROR position, this mirror
automatically changes to reduce glare from headlamps
behind you.
The mirror also includes an eight
-point compass
display in the upper right corner of the mirror face.
When on, the compass automatically calibrates as the
vehicle is driven.When cleaning the mirror, use a paper towel or similar
material dampened with glass cleaner. Do not spray
glass cleaner directly on the mirror as that may cause the
liquid cleaner to enter the mirror housing.
Mirror Operation
The right side of the button, located at the bottom of the
mirror, turns the electrochromic mirror on and off. To
turn on the automatic dimming feature, press MIRROR.
To turn off automatic dimming, press MIRROR again.
The green indicator light will be illuminated when this
feature is active.

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2-50
Compass Operation
Press COMPASS once to turn the compass on or off.
When the ignition and the compass feature are on, the
compass will show two character boxes for
approximately two seconds. After two seconds, the
mirror will display the compass heading.
If, after two seconds, the display does not show a
compass heading (ªNº for North, for example), there
may be a strong magnetic field interfering with the
compass. Such interference may be caused by a
magnetic antenna mount, magnetic note pad holder or a
similar magnetic item.
Compass Calibration
If the letter ªCº appears in the compass display, the
mirror may need calibration.
The mirror can be calibrated in one of two ways:

Drive the vehicle in circles at 5 mph (8 km/h) or less
until the display reads a direction, or

Drive the vehicle on your everyday routine.Compass Variance
The mirror is set in zone eight upon leaving the factory.
It will be necessary to adjust the compass to compensate
for compass variance if you live outside zone eight.
Under certain circumstances, as during a long distance
cross
-country trip, it will be necessary to adjust for
compass variance. Compass variance is the difference
between earth's magnetic north and true geographic
north. If not adjusted to account for compass variance,
your compass could give false readings.
To adjust for compass variance:
1. Use the COMPASS button located at the bottom of
the mirror.
2. Press and hold the COMPASS button until a zone
number appears in the display.
3. Find your current location and variance zone number
on the following zone map.

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2-51
4. Press the COMPASS button on the bottom of the
mirror until the new zone number appears in the
display. After you stop pressing the button, the
display will show a ªCº in the direction display
within a few seconds. (This is the automatic calibration
mode
-- you'll need to drive in a circle to calibrate the
mirror. See ªCompass Calibrationº following.)
Power Remote Control Mirror (Heated)
The control on the
driver's door armrest
operates both outside
rearview mirrors. Rotate
the control knob to choose
the right or left mirror.
To adjust the mirror, push the control knob in the
direction you want the mirror to go. Adjust each mirror
so you can see the side of your vehicle and the area
behind your vehicle.
When you operate the rear window defogger, it also
warms both outside mirrors to help clear them of fog
or ice.
The mirrors can also be programmed for personalization
if you have the optional memory package. For more
information, see ªMemory Seat and Mirrorsº in
the Index.

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2-52 Driver's Outside Auto-Dimming
Rearview Mirror
Only the driver's side outside mirror will adjust for the
glare of headlamps behind you. This feature is
controlled by the on and off settings on the
electrochromic mirror. See ªElectrochromic Day/Night
Rearview Mirror with Compassº in the Index.
Curb View Assist Mirror (If Equipped)
If your vehicle is equipped with memory mirrors, it will
also be equipped with the curb view assist mirror
feature. This feature will cause the passenger's mirror to
tilt to a preselected position programmed through the
Driver Information Center when the vehicle is in
REVERSE (R). This feature may be useful in allowing
you to view the curb when you are parallel parking.
When the vehicle is shifted out of REVERSE (R) and a
five
-second delay has occurred, the passenger's mirror
will return to its original position.
If further adjustment is needed after the mirror is tilted,
the mirror switch may be used.
Convex Outside Mirror
Your passenger's side mirror is convex. A convex
mirror's surface is curved so you can see more from the
driver's seat.
CAUTION:
A convex mirror can make things (like other
vehicles) look farther away than they really are.
If you cut too sharply into the right lane, you
could hit a vehicle on your right. Check your
inside mirror or glance over your shoulder before
changing lanes.