2001 CADILLAC DEVILLE light

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Exterior Lamps
This control on the left
side of the instrument
panel operates
the following:

Headlamps

Taillamps

Parking Lamps

Sidemarker Lamps

License Plate Lamps
Parking Lamps
Turn the knob clockwise to the first stop, to turn on the
parking lamps, taillamps, sidemarker and license plate
lamps. If it is night, the instrument panel switch
backlighting will also illuminate. Turn the knob
counterclockwise all the way back to turn off the lamps
and lights.
Headlamps
Turn the knob clockwise all the way to turn on the
parking lamps and headlamps. Turn the control knob
counterclockwise to turn the lamps off.
Wiper
-Activated Headlamps
This feature activates the headlamps and parking lamps
after the windshield wipers have been in use for
approximately six seconds. To operate, the Twilight
Sentinel
 feature must be turned on. See ªTwilight
Sentinelº in the Index for more information.
When the exterior lamp control is in the off or parking
lamp position and the wiper control is on (delay, LO or
HI), the HEADLAMPS SUGGESTED message will
appear on the Driver Information Center (DIC).

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When the ignition is turned to OFF, the wiper-activated
headlamps will immediately turn off. The
wiper
-activated headlamps will also turn off if the
Twilight Sentinel or the windshield wipers are
turned off.
Lamps on Reminder
If the manual headlamp control is left on and a door is
opened, a warning chime will sound. An exception is
when the Twilight Sentinel function is active.
Daytime Running Lamps
Daytime Running Lamps (DRL) can make it easier for
others to see the front of your vehicle during the day.
DRL can be helpful in many different driving
conditions, but they can be especially helpful in the
short periods after dawn and before sunset. Fully
functional daytime running lights are required on all
vehicles first sold in Canada.The DRL system will make the low
-beam headlamps
come on at reduced intensity when the following
conditions are met:

it is still daylight and the ignition is on,

the headlamp switch is off and

the transaxle is not in PARK (P).
When DRL are on, only your low
-beam headlamps
(at reduced intensity) will be on. No other exterior
lamps such as the parking lamps, taillamps, etc. will be
on when the DRL are being used. Your instrument panel
won't be lit up either.
When the Twilight Sentinel switch is on and it's dark
enough outside, the low
-beam headlamps (at reduced
intensity) will turn off and automatic low
-beam
headlamp operation will occur. When the Twilight
Sentinel switch is on and it's bright enough outside,
the automatic lamps will go off, and the low
-beam
headlamps at reduced intensity will take over.

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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 even though the DRL
are still illuminated (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.
To idle your vehicle at night with the DRL off,
turn off the Twilight Sentinel and shift the transaxle
into PARK (P). Placing your vehicle in PARK (P)
disables the DRL. The DRL will stay off until you
shift out of PARK (P).
To drive your vehicle at night with the DRL off, turn
off the Twilight Sentinel and manually turn on the
parking lamps.
As with any vehicle, you should turn on the regular
headlamp system when you need it.Fog Lamps (If Equipped)
Use the fog lamps for better
vision in foggy or misty
conditions. When you press
the fog lamp button, a fog
lamp symbol located in the
instrument panel will come
on to indicate that the fog
lamps and the parking
lamps are on.
Press the button again to turn them off.
If you turn on the high
-beam headlamps, the fog lamps
will turn off. They'll turn back on again when you
switch to low
-beam headlamps.
When the Twilight Sentinel is on and the fog lamp
switch is activated, the fog lamps will remain on as well
as the headlamps and parking lamps.

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

This control is located
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. If you move
the control so it is barely on, the lamps will go off
quickly when you turn the ignition switch out of OFF.
You can adjust the delay time from only a few seconds
to about 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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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 or the HEADLAMPS SUGGESTED message
will be on whenever the ignition is on.
Exterior Lighting Battery Saver
If the headlamp or manual parking lamp control
has been left on, the exterior lamps will turn off
approximately 10 minutes after the ignition is turned
to OFF. 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 OFF 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.
If the headlamp switch is turned on after the ignition key
is moved to either OFF or ACCESSORY, the lamps will
not time out.

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Interior Lamps
Instrument Panel
Intensity/Brightness Control
The displays automatically dim when it becomes dark
outside and your lights are on. The displays automatically
brighten when it becomes light outside. Backlighting
will only remain active as long as the parking lamps
are on and it is dark outside. The brightness of the
backlighting can be adjusted by using the instrument
panel brightness control.
The button is located to
the right of the Twilight
Sentinel control. Push the
button in to release it to
the outward position.
Turn the button counterclockwise to dim and clockwise
to brighten the lighting. Push the button in to return it to
the original storage position.
Courtesy Lamps
The courtesy lamps are located on the headliner above
the rear seat. These lamps come on by turning the
instrument panel brightness control fully clockwise or
when any door is opened and it is dark outside. Puddle
lamps are located on the bottom of the front and rear
door trim.
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 the remote keyless entry transmitter unlock
button. If activated due to the transmitter, the lighting
will remain active for about 40 seconds. Since the
illuminated entry system uses the light sensor, it must be
dark outside in order for the courtesy lamps to turn on.
The courtesy lamps turn off approximately 25 seconds
after the last door is closed. They will dim to off if the
ignition key is placed in ON, or immediately deactivate
if the power locks are activated.

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Parade Dimming
This feature prohibits dimming of the digital displays
and backlighting during daylight hours when the key is
in the ignition and 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 and the parking lamps are active,
the digital displays can be adjusted by turning the lamp
control knob counterclockwise to dim and clockwise to
brighten lighting.
Reading Lamps
The reading lamps are located on the overhead console
on the headliner and in the rear door opening. 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.
Battery Load Management
The battery load management feature is designed to
monitor the vehicle electrical load and determine when
the battery is in a heavy discharge condition. During
times of high electrical loading, the engine may idle at
a higher RPM (revolutions per minute) setting than
normal to make sure the battery charges. High electrical
loads may occur when several of the following are
on: headlamps, high beams, fog lamps, rear window
defogger, high blower fan, heated seats and engine
cooling fans.

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If the battery continues to discharge, even with the
engine idling at a higher RPM setting, some electrical
loads will automatically be reduced. When this occurs,
the rear window defogger may take slightly longer to
clear the glass, the heated seats may not get as warm as
they usually do and the fan blower may cut back to a
lower speed. For more battery saving information,
see ªBattery Saver Active Messageº in the Index.
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.
Mirrors
Electrochromic Day/Night Rearview Mirror
with Compass
Your vehicle has an electrochromic inside rearview
mirror with a compass. Your vehicle's mirror also
contains OnStar

controls. For more information
about OnStar, see ªOnStarº in the Index.