2003 CADILLAC DEVILLE headlamp

Lamps on Reminder
A warning chime will sound if the exterior lamp control
is left on in either the headlamp or parking lamp position
and the driver's door is opened with the ignition off.
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
lamps are required on all vehicles ®rst 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 exterior lamp control is in the off position and
·the transaxle is not in PARK (P).
When DRL are on, only your high-beam headlamps at
reduced brightness 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
žlever is on and it's dark
enough outside, the high-beam headlamps at reduced
intensity will turn off and normal low-beam headlamp
operation will occur.When the Twilight Sentinel
žlever is on and it's bright
enough outside, the regular lamps will go off, and
the high-beam headlamps at reduced brightness will
take over. If you start your vehicle in a dark garage, the
automatic headlamp system will come on immediately.
Once you leave the garage, it will take approximately
one minute for the automatic headlamp system to
change to DRL if it is light outside. During that delay,
your instrument panel cluster may not be as bright
as usual. Make sure your instrument panel brightness
knob is in the full bright position. See ªInstrument Panel
Brightnessº under
Interior Lamps on page 3-19.
If it's dark enough outside and the Twilight
Sentinel
žlever is off, a HEADLAMPS SUGGESTED
message will display on the Driver's Information Center
(DIC). This message informs the driver that turning
on the exterior lamps is recommended even though the
DRL are still illuminated.
Turning on the Twilight Sentinel
žor the headlamps will
deactivate the DRL and remove the HEADLAMPS
SUGGESTED message. If the parking lamps or the fog
lamps were turned on instead, the DRL will still deactivate
and the HEADLAMPS SUGGESTED message will
continue to be displayed.
To idle your vehicle with the DRL off at night, turn off the
Twilight Sentinel
žand 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).
3-16

To drive your vehicle with the DRL off, turn off the
Twilight Sentinelžand manually turn on the parking
lamps or fog lamps (if equipped).
As with any vehicle, you should turn on the regular
headlamp system when you need it.
Fog Lamps
If your vehicle has fog lamps, use them for better vision
in foggy or misty conditions.
The fog lamp button is
located to the left of the
steering wheel on the
instrument panel.
When you press the fog lamp button, a fog lamp symbol
in the button and the fog lamp light on the instrument
panel cluster 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
žis on and the fog lamps are
turned on, the fog lamps, headlamps and parking
lamps will remain on.
The ignition must be on for the fog lamps to operate.
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 Sentinelž
This lever is located next
to the exterior lamp
control. It automatically
turns the lamps on and off
by sensing how dark it
is outside.
3-17

To operate the Twilight Sentinelž, leave the exterior
lamp control in the off position and move the TWILIGHT
lever to any position but OFF.
If you move the lever 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 lever 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
žlever 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 or turning the
exterior lamp control to the headlamp position will remove
the HEADLAMPS SUGGESTED message.
Light Sensor
The light sensor for the DRL and the Twilight
Sentinelžis located in the center of the front defogger
grille. If you cover the sensor, it will read ªdarkº and the
exterior lamps or the HEADLAMPS SUGGESTED
message will be displayed whenever the ignition is on.
3-18

Exterior Lighting Battery Saver
If the manual parking lamps or headlamps have been
left on, the exterior lamps will turn off approximately
10 minutes after the ignition is turned to OFF. This
protects against draining the battery in case you have
accidentally left the headlamps or parking lamps on. The
battery saver does not work if the headlamps are
turned on after the ignition switch is turned to OFF.
If you need to leave the lamps on for more than
10 minutes, use the exterior lamp control to turn the
lamps back on. To delay the lamps from turning off,
see ªTwilight Sentinel
žº listed previously in this section.
Interior Lamps
Instrument Panel Brightness
This feature controls the brightness of the instrument
panel lights.
The knob for this feature is
located to the right of the
Twilight Sentinel
žlever.
Press the knob to release it to the outward position.
Turn the knob clockwise to brighten the lights or
counterclockwise to dim them. Press the knob to return
it to the original storage position.
3-19

Courtesy Lamps
The courtesy lamps are located on the headliner above
the rear seat. These lamps come on by turning the
instrument panel brightness knob 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.
Entry Lighting
This feature turns on the courtesy lamps and the
backlighting to the door switches and to the exterior
lamp control 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 entry lighting
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.
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
žand 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 instrument panel brightness knob counterclockwise
to dim and clockwise to brighten lighting.
3-20

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's 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 revolutions per minute (rpm) 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, the climate control fan at high speeds, heated
seats and engine cooling fans.
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 may cut back to a
lower speed. For more battery saving information, see
ªBattery Saver Active Messageº under
DIC Warnings
and Messages on page 3-60.
3-21

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.
Night Vision System
The optional Night Vision System can help you see
better when you drive at night. The system works
by sensing heat given off by objects in its ®eld of view.
Warmer objects, such as pedestrians, animals and
other moving vehicles, will appear whiter. Colder objects,
such as the sky, signs and parked vehicles, will
appear darker.Use this system as an aid to help you in seeing objects
beyond the headlamps. Do this by occasionally
glancing at the image as you would a rearview mirror.
Do not stare at the image.
The Night Vision System can be operated if:
·the instrument panel brightness knob is in any
position except OFF
·it is dark enough outside
·the headlamps or fog lamps (if equipped) are on
and
·the ignition is turned to ON.
3-22

ENGINE COOLANT HOT, IDLE ENGINE ± 44:This
message will appear when the engine coolant
temperature is over 262ÉF (128ÉC). Stop and allow your
vehicle to idle in PARK (P) until it cools down and the
message is removed. Do not increase engine speed
above a normal idle. If it does not cool down, turn off the
engine and have it serviced before driving it again.
Severe engine damage can result from an overheated
engine. See
Engine Overheating on page 5-27.
ENGINE HOT±AC OFF ± 16:This message displays
when the engine coolant becomes hotter than the normal
operating temperature. To avoid added strain on a hot
engine, the air conditioning compressor is automatically
turned off. When the coolant temperature returns to
normal, the A/C operation will automatically resume. You
can continue to drive your vehicle. If this message
continues to appear, have the system repaired as soon
as possible to avoid compressor damage.
ENGINE OVERHEATED, STOP ENGINE ± 42:This
message will appear when the engine has overheated.
Stop and turn the engine off immediately to avoid severe
engine damage. See
Engine Overheating on page 5-27.
A multiple chime will also sound when this message is
displayed.
ENGINE POWER REDUCED ± 41:This message
informs you that the vehicle is reducing engine power
because the transaxle is being placed in gear under
conditions that may cause damage to the vehicle's
engine, transaxle or ability to accelerate.FUEL LEVEL LOW ± 11:This message serves as a
warning that the fuel level in the tank is critically
low. Stop for fuel soon. A single chime will sound when
this message is displayed.
HEADLAMPS SUGGESTED ± 23:If it's dark enough
outside and the headlamps and Twilight Sentinel
ž
controls are off, this message will display on the DIC.
This message informs the driver that turning on the
exterior lamps is recommended even though the DRL
are still illuminated. It has become dark enough outside
to require the headlamps and/or other exterior lamps.
This message will also appear if the optional
RainsenseŸ wiping feature is on and the Twilight
Sentinel
žis off.
ICE POSSIBLE ± 13:This message appears when the
outside air temperature is cold enough to create icy
road conditions.
LEFT REAR DOOR AJAR ± 142:The left rear door is
open or ajar when this message appears. The ignition
must be in ON and the transaxle not in PARK (P) for this
message to display. A chime will sound if the vehicle's
speed is greater than 3 mph (5 km/h).
OIL PRESSURE LOW STOP ENGINE ± 35:If this
message appears while the engine is running, stop the
engine and do not operate it until the cause of low oil
pressure is corrected. Severe damage to the engine can
result. A multiple chime will sound when this message is
displayed.
3-63