2006 CADILLAC DTS PROFESSIONAL headlamp

Headlamp Aiming
The vehicle has a visual optical headlamp aiming
system. The aim has been preset at the factory and
should need no further adjustment.
However, if the vehicle is damaged in an accident, the
headlamp aim may be affected and adjustment may
be necessary.
If oncoming vehicles ash their high beams at you, this
may also mean the vertical aim needs to be adjusted.
It is recommended that the vehicle is taken to your
dealer for service if the headlamps need to be re-aimed.
It is possible however, to re-aim the 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.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 at
surface.
The vehicle must have all four tires on a level
surface which is level all the way to the wall or other
at surface.
The vehicle should be placed so it is perpendicular
to the wall or other at surface.
The vehicle should not have any snow, ice, or
mud on it.
The vehicle should be fully assembled and all other
work stopped while headlamp aiming is being
performed.
The vehicle should be normally loaded with a full
tank of fuel and one person or 160 lbs (75 kg)
sitting on the driver’s seat.
Tires should be properly inated.
The spare tire is in its original location in
the vehicle.
5-44

Headlamp aiming is done with the vehicle’s low-beam
headlamps. The high-beam headlamps will be correctly
aimed if the low-beam headlamps are aimed properly.
To adjust the vertical aim, do the following:
1. Open the hood. SeeHood Release on page 5-11
for more information.
2. Find the center line running through the lens of the
headlamp.
3. Measure the distance from the ground to the center
line running through the lens of the headlamp.
Record the distance.4. At the wall or other at surface, measure from the
ground upward (A) to the recorded distance from
Step 3 and mark it.
5. Draw or tape a horizontal line the width of the
vehicle at the wall or other at surface where it
was marked it Step 4.
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.
6. 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.
5-45

7. Locate the vertical headlamp aiming screws. They
are located under the hood near each headlamp
assembly. First lift the ap to access either of them.
Each one is the top outboard screw by the “V” on
the cover panel next to the aiming ap.
The adjustment screw can be turned witha6mm
hex wrench.
8. Turn the vertical aiming screw until the headlamp
beam is aimed to the horizontal tape line. If you
turn it clockwise, it will raise the beam and if
you turn it counterclockwise, it will lower the beam.
The top edge of the cut-off should be positioned
at the bottom edge of the horizontal tape line.9. Make sure that the light from the headlamp is
positioned at the bottom edge of the horizontal
tape line. The lamp on the left (A) shows the correct
headlamp aim. The lamp on the right (B) shows
the incorrect headlamp aim.
10. Repeat Steps 7 through 9 for the opposite
headlamp.
5-46

Bulb Replacement
It is recommended that all bulbs be replaced by
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 qualied technician service them.
Your vehicle has 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.
Windshield Wiper Blade
Replacement
Windshield wiper blades should be inspected for wear
or cracking. SeeScheduled Maintenance on page 6-4
for more information on wiper blade inspection.
Replacement blades come in different types and are
removed in different ways. Here’s how to remove
the wiper blade:
1. Turn the engine off.
2. Lift the windshield wiper arm and blade away from
the windshield.
5-47

Wheel Alignment and Tire Balance
The tires and wheels on your vehicle were aligned and
balanced carefully at the factory to give you the longest
tire life and best overall performance. Adjustments to
wheel alignment and tire balancing will not be necessary
on a regular basis. However, if you notice unusual tire
wear or your vehicle pulling to one side or the other, the
alignment may need to be checked. If you notice your
vehicle vibrating when driving on a smooth road, your
tires and wheels may need to be rebalanced. See your
dealer for proper diagnosis.
Wheel Replacement
Replace any wheel that is bent, cracked or badly rusted
or corroded. If wheel nuts keep coming loose, the
wheel, wheel bolts and wheel nuts should be replaced.
If the wheel leaks air, replace it. Some aluminum
wheels can sometimes be repaired. See your GM dealer
if any of these conditions exist.
Your GM dealer will know the kind of wheel you need.
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.
If your vehicle is a professional model, the wheels have
a unique offset and bolt hole diameter. Each of the
wheels on the professional vehicle have eight wheels
nuts. The wheels on the non-professional vehicle
have ve wheel nuts. SeeChanging a Flat Tire on
page 5-72for more information.
5-69

Electrical System
Add-On Electrical Equipment
Notice:Don’t add anything electrical to your
vehicle unless you check with your dealer rst.
Some electrical equipment can damage your vehicle
and the damage wouldn’t be covered by your
warranty. Some add-on electrical equipment can
keep other components from working as they
should.
Your vehicle has an airbag system. Before attempting to
add anything electrical to your vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-70.
Headlamp Wiring
The headlamp wiring system has four individual fuses.
An electrical overload will cause the lamps to go on
and off, or in some cases to remain off. If this happens,
have the headlamp wiring checked right away.
Windshield Wiper Fuses
The windshield wiper motor is protected by an internal
circuit breaker. If the wiper motor overheats due to
heavy snow, the wipers will stop until the motor cools
and will then restart.
A fuse powers the wiper motor. If the fuse blows, there
is an electrical problem. Be sure to have it xed.
5-92

Fuses Usage
F1 Spare
F2 Driver’s Side Low-Beam
F3 Passenger’s Side Low-Beam
F4 Airbag Ignition
F5 Engine Control Module
F6 Transaxle Ignition
F7 Spare
F8 Spare
F9 Spare
F10 High-Beam Headlamp
F11 High-Beam Headlamp
F12 Windshield Washer Pump
F13 Spare
F14Climate Controls, Instrument Panel
Cluster
F15 Spare
F16 Fog Lamps
F17 Horn
F18 Windshield Wiper
F19 Driver’s Side Corner Lamp
F20 Passenger’s Side Corner Lamp
F21 Oxygen Sensor
F22 PowertrainFuses Usage
F23Engine Control Module (ECM),
Crank
F24 Injector Coil
F25 Injector Coil
F26 Air Conditioning
F27 Air Solenoid
F28Engine Control Module, Transaxle
Control Module (ECM/TCM)
F29 Spare
F30 Spare
F31 Spare
F32 Spare
J-Case Fuse Usage
JC1 Heated Windshield Washer
JC2 Cooling Fan 1
JC3 Spare
JC4 Crank
JC5 Cooling Fan 2
JC6 Anti-lock Brake System 2
JC7 Anti-lock Brake System 1
JC8 Air Pump
5-95

Ashtray(s)......................................................3-43
Audio System(s).............................................3-97
Audio Steering Wheel Controls....................3-122
Care of Your CD Player..............................3-124
Care of Your CDs......................................3-124
Diversity Antenna System............................3-124
Navigation/Radio System, see
Navigation Manual..................................3-121
Radio with CD...........................................3-102
Setting the Time................................3-98, 3-100
Theft-Deterrent Feature...............................3-121
Understanding Radio Reception...................3-123
XM™ Satellite Radio Antenna System...........3-125
Automatic Transaxle
Fluid..........................................................5-19
Operation...................................................2-26
B
Battery..........................................................5-37
Exterior Lighting Battery Saver......................3-35
Inadvertent Power Saver..............................3-37
Load Management.......................................3-37
Before Leaving on a Long Trip.........................4-23
Brake
Anti-Lock Brake System (ABS)........................ 4-7
Emergencies................................................ 4-8
Panic Assist................................................4-11Brake (cont.)
Parking......................................................2-30
System Warning Light..................................3-62
Brakes..........................................................5-35
Braking........................................................... 4-6
Braking in Emergencies..................................... 4-8
Break-In, New Vehicle.....................................2-23
Bulb Replacement...........................................5-47
Headlamp Aiming........................................5-44
High Intensity Discharge (HID) Lighting...........5-47
Buying New Tires...........................................5-65
C
Calibration...............................1-8, 2-35, 2-37, 2-39
California Fuel.................................................. 5-6
California Proposition 65 Warning....................... 5-3
Canadian Owners................................................ ii
Capacities and Specications..........................5-101
Carbon Monoxide...................2-13, 2-33, 4-26, 4-38
Care of
Safety Belts................................................5-86
Your CD Player.........................................3-124
Your CDs .................................................3-124
Center Console Storage Area...........................2-50
Center Flex Storage Unit.................................2-50
Center Front Passenger Position,
Safety Belts................................................1-23
2