1999 BUICK LESABRE Owner's Manual

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When the DRL are on, only your high-beam headlamps
will be on. The parking lamps, taillamps, sidemarker
and other lamps won't be on. Your instrument panel
lights won't be on either.
When it is dark enough outside, your low
-beam
headlamps will come on. The other lamps that turn on
with your headlamps will also turn on. When it is bright
enough outside, the regular lamps will go off, and your
high
-beam headlamps change to the reduced brightness
of DRL.
To turn off all exterior lighting at night when you are
parked, turn off the headlamps and move the twilight
sentinel control all the way toward MIN. The exterior
lamps will turn back on automatically when you move
the transaxle out of PARK (P).
As with any vehicle, you should turn on the regular
headlamp system when you need it.
Cornering Lamps (If Equipped)
The cornering lamps are designed to turn on when you
signal a turn. This will provide more lighting when
cornering at night.
Twilight Sentinel
Twilight sentinel turns your
lamps on and off by sensing
how dark it is outside.
To operate it, leave the lamp switch off.
If you move the control all the way to MAX, your
headlamps will remain on for three minutes after you
turn off your engine. As you move the control toward
MIN, the headlamps will turn off more quickly when
you turn off your engine. You can change this delay time
from only a few seconds to three minutes.

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The exterior lamps can be completely shut off while the
vehicle is in PARK (P) by sliding the twilight sentinel
control all the way toward MIN, and release. To turn the
exterior lamps back on, slide the control all the way
toward MIN again, and release; or, shift out of
PARK (P).
Light Sensor
Your twilight sentinel and
DRL work with the light
sensor on top of the
instrument panel. Don't
cover it up. If you do, the
sensor will read ªdarkº and
the headlamps will turn on.
Interior Lamps
Instrument Panel
Intensity/Brightness Control
The instrument panel
intensity can be adjusted by
moving this lever between
LO and HI. The instrument
panel lights will be on only
when the headlamps are on.
The interior courtesy lamps
can be turned on by sliding
the lever all the way to the
right, to INT.
Courtesy Lamps
When any door is opened, several lamps go on. They
make it easy for you to enter and leave the vehicle. You
can also turn these lamps on by sliding the PANEL
LIGHTS switch to INT (Interior).

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2-43 Illuminated Entry (If Equipped)
Press the UNLOCK button on the remote keyless entry
transmitter (if equipped) and the interior courtesy lamps
will turn on and stay on for up to one minute. The lamps
will turn off immediately by pressing the LOCK button
on the remote keyless entry transmitter, starting the
engine or activating the power door locks.
Delayed Entry Lighting
When you open the door, the interior lamps will turn on.
When you close the door with the ignition off, the
interior lamps will stay on for 25 seconds or until the
ignition is turned to an on position. Note that locking the
doors will override the delayed entry lighting feature
and the lamps will turn off right away.
Theater Dimming
This feature allows for a three to five-second fade out of
the courtesy lamps instead of immediate turn off.
Delayed Exit Lighting
With this feature, the interior lamps will turn on and stay
on for up to 25 seconds after you remove the key from
the ignition. This will give you time to find the door pull
handle or lock switches.
Perimeter Lighting (If Equipped)
When the UNLOCK button on the remote keyless entry
transmitter is pressed, the headlamps, parking lamps,
back
-up lamps and cornering lamps will turn on if it is
dark enough outside according to the twilight sentinel.
If your vehicle is not equipped with twilight sentinel
and perimeter lighting is active, the lights will turn on
whenever the UNLOCK button on the transmitter
is pressed.
Personal Choice Programming
This feature can be programmed in the on or off mode
for each transmitter.
To turn the feature off:
1. Turn the ignition key to OFF.
2. Press and hold LOCK on the power door lock switch
throughout this procedure. All the doors will lock.
3. Press the instant alarm on the remote keyless entry
transmitter. Perimeter lighting remains on at this
time and the horn will chirp two times.

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4. Press the instant alarm on the remote keyless entry
transmitter again. Perimeter lighting is disabled and
the horn will chirp one time.
5. Release the door lock switch. The perimeter lighting
feature is now off.
To turn the feature on:
1. Turn the ignition key to OFF.
2. Press and hold LOCK on the power door lock switch
throughout this procedure. All the doors will lock.
3. Press the instant alarm on the transmitter again.
Perimeter lighting is now enabled and the horn will
chirp one time.
4. Press the instant alarm on the transmitter again.
Perimeter lighting is now enabled and the horn will
chirp two times.
5. Release the door lock switch. The perimeter lighting
feature is now on.
This procedure only changes the mode for the
transmitter used to change this setting. The procedure
will need to be repeated for the second transmitter.Front Reading Lamps (If Equipped)
Front seat reading lamps are turned on or off by pressing
the LAMP switch.

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2-45 Rear Reading Lamps (If Equipped)
The lamp, switch and a coat hanger are above each rear
door. Slide the switch to turn the lamp on or off.
Battery Rundown Protection
This feature automatically turns off the interior lamps if
any are left on for more than 10 minutes when the
ignition is off or a door is left open. This will keep your
battery from running down.
This feature also shuts off the exterior lamps if they are
left on for more than 10 minutes when the ignition is
OFF. You may override this feature for the exterior
lamps by turning the lamps off and then back on after
the ignition is turned to OFF. If you do this, the exterior
lamps will stay on until you manually turn them off.If the feature is enabled for the interior and exterior
lamps, all lamps should turn off at approximately the
same time.
Mirrors
Day/Night Manual Rearview Mirror
With Integral Reading Lamps

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When you are sitting in a comfortable driving position,
adjust the mirror so you can see clearly behind your
vehicle. The day
-night adjustment allows you to
adjust the mirror to avoid glare from the headlamps
behind you.
The integral reading lamps are turned on or off by
pressing the toggle switch at the bottom of the mirror.
These lamps are also part of the courtesy lamps
described earlier in this section.
Electrochromic Day/Night Rearview Mirror
(If Equipped)
Your vehicle may have an automatic electrochromic
day/night rearview mirror.
When this feature is turned on, the mirror automatically
changes to reduce glare from headlamps behind you. A
photocell on the mirror senses when it is becoming dark
outside. Another photocell built into the mirror face
senses when headlamps are behind you.
At night, when the glare is too high, the mirror will
gradually darken to reduce glare (this change may take a
few seconds). The mirror will return to its clear daytime
state when the glare is reduced.Mirror Operation
To turn on the automatic dimming feature, press
AUTO. To turn off automatic dimming, press OFF.
The green indicator light will be illuminated when this
feature is active.
Time Delay
The automatic mirror has a time delay feature which
prevents unnecessary switching from the night back to
the day position. This delay prevents rapid changing of
the mirror as you drive under lights and through traffic.

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Cleaning the Photocells
Use a cotton swab and glass cleaner to clean the
photocells when necessary.
Electrochromic Day/Night Rearview Mirror
with Compass (If Equipped)
Your vehicle may have 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. A time delay feature prevents rapid
changing from the day to night positions while driving
under lights and through traffic.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. Use a
cotton swab and glass cleaner to clean the photocells
when necessary.
Mirror Operation

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The right side of the switch 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.
Compass Operation
Press the COMPASS button 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 should ever appear in the compass
window, the mirror may need calibration.
The mirror can be calibrated in one of two ways:

Drive the vehicle in circles at five 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. Press and hold the COMPASS button located at the
bottom of the mirror until a zone number appears in
the display.
2. Find your current location and variance zone number
on the following zone map.