1999 CADILLAC DEVILLE Owners Manual

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6-35
5. Reinstall the headlamp housing socket back into the
headlamp assembly.Headlamp Aiming
Your vehicle has a headlamp system equipped with
horizontal and vertical aim indicators. The aim has been
pre
-set at the factory and should need no further
adjustment. This is true even though your vertical and
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 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 it 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.

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6-36
The vehicle should be properly prepared as follows:

The vehicle must have all four tires on a perfectly
level surface.

If necessary, pads may be used on an uneven 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.

There should not be any cargo or loading of the
vehicle, except it should have a full tank of fuel and
one person or 160 lbs. (75 kg) on the driver's seat.

Close all doors.

Tires should be properly inflated.

Rock the vehicle to stabilize the suspension.
A. Horizontal Aiming Screw
B. Vertical Aiming Screw
Start with the horizontal aim. The adjustment screws can be
turned with an E8 Torx
 socket or T15 Torx screwdriver.
Once the horizontal aim is adjusted, then adjust the
vertical aim.

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A. Horizontal Aiming Screw
C. Indicator
1. Turn the horizontal aiming screw until the indicator
is lined up with zero.B. Vertical Aiming Screw
D. Level Bubble
2. Turn the vertical aiming screw until the level bubble
is lined up with zero.

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6-38 Front Turn Signal Lamps
1. The turn signal lamps are located below the
headlamps. To access, lift off the headlamp cover
(see Step 1 under ªHeadlampsº).
2. 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.

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6-39 Center High-Mounted Stoplamp (CHMSL)
1. Lift the trim cover to remove.
2. Twist the socket counterclockwise and remove the
socket and bulb from the housing.
3. Replace the bulb.
Reverse the steps to reassemble the stoplamp assembly.

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6-40 Rear Turn Signal Lamps and Taillamps
1. Loosen the upper Torx
screw, but don't remove it.
2. Gently tilt the top portion of the lamp housing to
access the bulb sockets. If you can't access the lower
bulb socket, remove the lamp housing completely.
3. Press the bulb socket housing lever and turn the
socket counterclockwise to remove it.

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4. Replace the bulb by pressing and turning
it counterclockwise.
5. Once you have installed the new bulb and socket into
the lamp housing, insert the tab on the lower portion
of the lamp housing first, then gently fit the rest of
the housing in place.
Windshield Wiper
Blade Replacement
Windshield wiper blades should be inspected at least
twice a year for wear or cracking. See ªWiper Blade
Checkº in the Maintenance Schedule booklet under
Part B ªOwner Checks and Servicesº for
more information.
It's a good idea to clean or replace the wiper blade
assembly on a regular basis or when worn. For proper
windshield wiper blade length and type, see ªNormal
Maintenance Replacement Partsº in the Index
To replace the wiper blade assembly:
1. Turn the ignition to ACCESSORY and turn the
wipers on. Position the wipers on the windshield in
the ªmidº wipe position. Then with the door open,
turn the ignition to OFF.

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2. Insert a screwdriver into the slot as shown and press
down to release the wiper blade assembly.
3. Align the wiper arm pin with the hole on the wiper
blade assembly and snap it into place to install.
Tires
Your new vehicle comes with high-quality tires made by
a leading tire manufacturer. If you ever have questions
about your tire warranty and where to obtain service, see
your Cadillac Warranty booklet for details.
CAUTION:
Poorly maintained and improperly used tires
are dangerous.

Overloading your tires can cause
overheating as a result of too much friction.
You could have an air
-out and a serious
accident. See ªLoading Your Vehicleº in
the Index.
CAUTION: (Continued)