2004 CADILLAC DEVILLE low beam

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.
Headlamp Horizontal Aiming
If your vehicle has the horizontal aim indicators, 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.
5-56

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 lamp; if left low beam, subtract two
inches. Record this distance.
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.
5-57

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.
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. Repeat Steps 4 and 5
for the opposite
headlamp.
5-58

Center High-Mounted Stoplamp
(CHMSL)
It is recommended that this component be replaced as
a unit. See your dealer.
Taillamps, Turn Signal, and
Stoplamps
It is recommended that this component be replaced as
a unit. See your dealer.
Replacement Bulbs
For any bulb not listed here, contact your dealer.
Lamp Bulb Number
Cornering Lamps 3157
Front Turn Signal 3157
Headlamps, Composite
Lower High Beam
Upper Low Beam9005
9006
5-64

Fuses Usage
1 Assembly Line Diagnostic Work
2 Accessory
3 Windshield Wipers
4 Not Used
5 Headlamp Low Beam Left
6 Headlamp Low Beam Right
7 Instrument Panel
8 Powertrain Control Module Battery
9 Headlamp High Beam Right
10 Headlamp High Beam Left
11 Ignition 1
Fuses Usage
12 Fog Lamps
13 Transmission
14 Cruise Control
15 Coil Module
16 Injector Bank #2
17 Not Used
18 Not Used
19 Powertrain Control Module Ignition
20 Oxygen Sensor
21 Injector Bank #1
22 Cigar Lighter #2
23 Cigar Lighter #1
24 Daytime Running Lamps
25 Horn
26 Air Conditioner Clutch
42 Not Used
43 Not Used
44 Anti-Lock Brake System
45 Air Pump
46 Cooling Fan 1
47 Cooling Fan 2
5-109

Relays Usage
27 Headlamp High Beam
28 Headlamp Low Beam
29 Fog Lamps
30 Daytime Running Lamps
31 Horn
32 Air Conditioner Clutch
33 Not Used
34 Accessory
35 Not Used
36 Starter 1
37 Cooling Fan 1
38 Ignition 1
39 Cooling Fan Series/Parallel
40 Cooling Fan 2
Circuit
BreakersUsage
41 Starter
The spare fuses are located in numbers 48 through 52.
The fuse puller is located in number 53.
Removing the Rear Seat Cushion
Notice:If you touch the exposed wires with
the metal on the seat cushion, you could cause a
short that could damage the battery and or
wires. Avoid contact between the rear seat and the
fuse center whenever you remove or reinstall
the rear seat. Do not remove covers from any of the
covered parts, and do not store anything under
the seats.
To remove the rear seat cushion, do the following:
1. Pull up on the front of the cushion to release the
front hooks.
2. Pull the cushion up and out toward the front of the
vehicle.
5-110

Following Distance..........................................4-46
Front Ashtray.................................................3-31
Front Storage Area.........................................2-51
Fuel............................................................... 5-5
Additives...................................................... 5-6
California Fuel.............................................. 5-6
Data Display...............................................3-61
Filling a Portable Fuel Container....................5-12
Filling Your Tank........................................... 5-8
Fuels in Foreign Countries.............................. 5-7
Gage.........................................................3-60
Gasoline Octane........................................... 5-5
Gasoline Specications.................................. 5-5
Full Floor Console Storage Area.......................2-51
Fuses
Fuses and Circuit Breakers.........................5-108
Windshield Wiper.......................................5-107
G
Gage
Engine Coolant Temperature.........................3-54
Fuel..........................................................3-60
Speedometer..............................................3-47
Tachometer.................................................3-49
Garage Door Opener.......................................2-46
Garment Hooks..............................................2-53Gasoline
Octane........................................................ 5-5
Specications............................................... 5-5
Gate Operator and Canadian Programming........2-49
Glove Box.....................................................2-50
Glovebox-Mounted CD Changer......................3-110
GM Mobility Program for Persons with
Disabilities.................................................... 7-6
H
Hazard Warning Flashers................................... 3-6
Headlamp
Aiming.......................................................5-55
Horizontal Aiming.........................................5-56
Vertical Aiming............................................5-57
Headlamp High/Low-Beam Changer...................3-10
Headlamp Wiring...........................................5-107
Headlamps....................................................5-59
Bulb Replacement.......................................5-59
Front Turn Signal, Sidemarker, Parking and
Cornering Lamps......................................5-63
Halogen Bulbs............................................5-59
Heated Seats................................................... 1-3
Heated Steering Wheel..................................... 3-8
Highway Hypnosis...........................................4-25
Hill and Mountain Roads..................................4-26
7