headlamp CADILLAC DEVILLE 2002 8.G Owner's Manual

6-38
6. Firmly grasp the outboard side of the headlamp
assembly with both hands and pull hard enough so
that the whole assembly separates from the vehicle.
7. Remove the bulb socket
dust cover.
8. Turn the headlamp
housing socket
counterclockwise to
unlock the socket from
the lamp housing.

6-39
9. Pull the old bulb out of
the socket.
10. Install the new bulb into the socket. Make sure that
the bulb is locked in firmly.
11. Reinstall the headlamp housing socket into the
headlamp assembly.
12. Reinstall the headlamp assembly by reversing
Steps 2 through 6.To reinstall the filler panel, do the following:
1. Place the filler panel in the correct location.
2. Reset each push
-pin by holding each by the outer
circle while pushing up on the pin assembly from
below. The center portion of the push
-pin should
now be above the outer circle.
3. After placing each push
-pin into the opening, press
down on the outer circle until it is seated against the
surface of the filler panel.
4. Lock each push
-pin in place by pressing the center
of each down until it is level with the outer circle.
Use care not to press down so far that the push
-pin
releases again.

6-40
Headlamp Aiming
Your vehicle has a visual optical headlamp aiming system
equipped with horizontal aim indicators. The aim has been
preset at the factory and should need no further adjustment.
This is true even though your horizontal aim indicators may
not fall exactly on the ª0º (zero) marks on their scales.If your vehicle is damaged in an accident, the headlamp
aim may be affected. Aim adjustment to the low beam
may be necessary if it is difficult to see lane markers
(for horizontal aim), or if oncoming drivers flash their
high beams at you (for vertical aim). If you believe your
headlamps need to be re
-aimed, we recommend that you
take your vehicle to your dealer for service. However, it
is possible for you to re
-aim your headlamps as
described in the following procedure.
NOTICE:
To make sure your headlamps are aimed
properly, read all the instructions before
beginning. Failure to follow these instructions
could cause damage to headlamp parts.

6-41
The vehicle should be properly prepared as follows:

The vehicle should be placed so the headlamps
are 25 ft. (7.6 m) from a light colored wall or other
flat surface.

The vehicle must have all four tires on a perfectly
level surface which is level all the way to the wall or
other flat surface.

The vehicle should be placed so it is perpendicular to
the wall or other flat surface.

The vehicle should not have any snow, ice or mud
attached to it.

The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being done.

The vehicle should be normally loaded with a full
tank of fuel and one person or 160 lbs. (75 kg) on the
driver's seat.

Tires should be properly inflated.
Headlamp aiming is done with the vehicle low beam
lamps. The high beam lamps will be correctly aimed if
the low beam lamps are aimed properly.
The headlamp aiming devices are under the hood near
the headlamps.
If you believe your headlamps need horizontal
(left/right) adjustment, follow the horizontal aiming
procedure. If you believe your headlamps need only
vertical (up/down) adjustment, follow only the vertical
aiming procedure.
Adjustment screws can be turned with an E8 Torx

socket or T15 Torx screwdriver.

6-42
Headlamp Horizontal Aiming
Turn the horizontal aiming screw (A) until the
indicator (B) is lined up with zero.
Once the horizontal aim is adjusted, then adjust the
vertical aim.Headlamp Vertical Aiming
NOTICE:
Horizontal aiming must be performed before
making any adjustments to the vertical aim.
Adjusting the vertical aim first will result in an
incorrect headlamp aim.
1. Find the aim dot on the lens of the low beam lamps.

6-43
2. Measure the distance from the ground to the aim dot
on each lamp; if left low beam, subtract two inches.
Record this distance.
3. At the wall or other flat surface, measure from the
ground upward the recorded distance from Step 2
and draw or tape a horizontal line the width of
the vehicle.4. Turn on the low-beam headlamps and place a piece
of cardboard or equivalent in front of the headlamp
not being aimed. This should allow only the beam of
light from the headlamp being aimed to be seen on
the flat surface.

6-44
NOTICE:
Do not cover a headlamp to improve beam
cut
-off when aiming. Covering a headlamp may
cause excessive heat build
-up which may cause
damage to the headlamp.
5. Turn the vertical aiming screw (C) until the
headlamp beam is aimed to the horizontal tape line.
The top edge of the cut
-off should be positioned at
the bottom edge of the horizontal tape line.

6-45
6. Repeat Steps 4
and 5 for the
opposite headlamp.Front Cornering Lamps
1. Follow Steps 1 through 6 in ªHeadlampsº
described previously.
2. Disconnect the cornering lamp bulb by pulling the
bulb out of the socket. Do not twist or turn the bulb.
3. Replace cornering lamp bulb by pushing the new
bulb directly into the socket.
4. Reinstall the cornering lamp housing socket into the
headlamp assembly.
5. Reverse Steps 1 through 6 in ªHeadlampsº
described previously.

6-46 Front Turn Signal Lamps
1. The turn signal lamps are located beside the
headlamp bulbs. To access, lift off the bulb socket
dust cover. See Steps 1 through 6 under
ªHeadlampsº described previously.
2. Press the tab down and turn the housing
socket clockwise to unlock the socket from the
lamp housing.
3. Remove the turn signal lamp housing socket and
replace the bulb.
4. Reverse Steps 1 and 2 to reinstall.

6-57
Each new wheel should have the same load-carrying
capacity, diameter, width, offset and be mounted the
same way as the one it replaces.
If you need to replace any of your wheels, wheel bolts
or wheel nuts, replace them only with new GM original
equipment parts. This way, you will be sure to have the
right wheel, wheel bolts and wheel nuts for your vehicle.
CAUTION:
Using the wrong replacement wheels, wheel
bolts or wheel nuts on your vehicle can be
dangerous. It could affect the braking and
handling of your vehicle, make your tires lose air
and make you lose control. You could have a
collision in which you or others could be injured.
Always use the correct wheel, wheel bolts and
wheel nuts for replacement.
NOTICE:
The wrong wheel can also cause problems with
bearing life, brake cooling, speedometer or
odometer calibration, headlamp aim, bumper
height, vehicle ground clearance and tire or tire
chain clearance to the body and chassis.
See ªChanging a Flat Tireº in the Index for
more information.
Used Replacement Wheels
CAUTION:
Putting a used wheel on your vehicle is
dangerous. You can't know how it's been used or
how far it's been driven. It could fail suddenly
and cause a crash. If you have to replace a wheel,
use a new GM original equipment wheel.