2003 CADILLAC SEVILLE Owners Manual

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 ®rst will result in an
incorrect headlamp aim.
1. Find the aim dot on the lens of the low beam
lamps.
2. Measure the distance from the ground to the aim
dot on each low beam lamp. Record this distance.
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3. At the wall or other ¯at surface, measure from the
ground upward the recorded distance from Step 2
and draw or tape a horizontal line the width of
the vehicle.
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.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 ¯at surface.
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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. Repeat Steps 4 and 5
for the opposite
headlamp.
Bulb Replacement
For the proper type of replacement bulb, seeReplacement Bulbs on page 5-61.
For any bulb changing procedure not listed in this
section, contact your dealer.
High Intensity Discharge (HID)
Lighting
{CAUTION:
The low beam high intensity discharge lighting
system operates at a very high voltage. If you
try to service any of the system components,
you could be seriously injured. Have your
dealer or a quali®ed technician service them.
Your vehicle may have HID headlamps. After your
vehicle's HID headlamp bulb has been replaced, you
may notice that the beam is a slightly different
shade than it was originally. This is normal.
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Halogen Bulbs
{CAUTION:
Halogen bulbs have pressurized gas inside
and can burst if you drop or scratch the bulb.
You or others could be injured. Be sure to read
and follow the instructions on the bulb
package.
Headlamps
1. Open the hood.
2. Remove the upper ®ller panel by loosening all the
screws and then removing the grommets.3. Remove the two bolts fastening the headlamp to
the headlamp mounting bracket.
4. Pull the headlamp straight forward to disengage the
locator pin at the outboard edge of the headlamp.
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5. To replace the low-beam bulb, ®rst remove the
rubber housing cover on the rear of the lamp.6. Then, turn the bulb socket counterclockwise to
unlock the socket from the lamp housing.
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7. Remove the headlamp bulb socket. 8. After removing the wiring harness connector from
the headlamp bulb socket, replace the bulb
assembly. Reconnect it to the wiring harness and
reinstall the headlamp bulb assembly back into
the headlamp housing.
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9. After reinstalling the bulb and socket, reinstall the
rubber cover. Make sure it fully covers the
headlamp socket.
10. To replace the high-beam bulb, turn the bulb socket
counterclockwise to unlock the socket from the
lamp housing. Follow the instructions in
Step 6 through 8 to install the new bulb.
11. Reinstall the upper ®ller panel by inserting the
grommets, along with the screws, back into
the holes.Front Turn Signal Lamps
1. The turn signal lamps are located on the outboard
side of the headlamps. To access, remove the
headlamp. See Steps 1, 2, 3, and 10 under
Headlamps on page 5-56.
2. Press the bulb socket tab and turn the bulb socket
counterclockwise to unlock the socket from the
lamp housing.
3. To remove the old bulb, grasp the socket ®rmly and
pull the bulb out.
4. Install the new bulb and reverse the steps to
reinstall the lamp housing.
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Center High-Mounted
Stoplamp (CHMSL)
It is recommended that this component be replaced as
a unit. See your dealer.
Taillamps and Turn Signal Lamps
1. Open the trunk to gain access to the lamp housing.
2. Remove the rear
compartment sill plate
by removing the
upper convenience net
retainers, located at
each end, as shown.
3. Move the spare tire cover out of the way.
4. Pull the trunk trim away to access the wing nuts.5. Remove the three wing nuts that fasten the taillamp
to the body.
6. Gently remove the taillamp from the body. The
taillamp is on the bottom of the housing and the
rear turn signal lamp is on the upper part of
the housing.
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