2001 CADILLAC DEVILLE headlamp

6-41
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
1. Find the aim dot on the lens of the 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.

6-42
3. At the wall or other flat surface, measure from the
floor to the recorded distance and draw 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 dimed. This should allow the beam cut
-off of the
headlamp being aimed to be seen on the flat surface.
NOTICE:
Do not cover a headlamp to improve beam
cut
-off when diming. Covering a headlamp may
cause excessive heat build
-up which may cause
damage to the headlamp.

6-43
5. Turn the vertical aiming screw (C) until the
headlamp beam is aimed to the horizontal tape line.Front Cornering Lamps
1. Follow Steps 1 through 4 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 bulb
directly into the socket.
4. Reinstall the cornering lamp housing socket back
into the headlamp assembly.
5. Reverse Steps 1 through 4 in ªHeadlampsº
described previously.

6-44 Front Turn Signal Lamps
1. The turn signal lamps are located beside the
headlamps. To access, lift off the bulb socket
dust cover. See Step 1 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.

6-55
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 an accident. If you have to replace a
wheel, use a new GM original equipment wheel.

6-66
Electrical System
Add-On Electrical Equipment
NOTICE:
Don't add anything electrical to your vehicle
unless you check with your dealer first. 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 air bag system. Before attempting to
add anything electrical to your vehicle, see ªServicing
Your Air Bag
-Equipped Vehicleº in the Index.
Headlamp Wiring
The headlamp wiring system has four individual fuses,
LF low, RF low, LF high and RF high. 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
A circuit breaker protects the wiper motor. If the wiper
motor overheats due to heavy snow, the wipers will stop
until the motor cools and will then restart.
A MiniFuse

powers the wiper motor. If the MiniFuse
blows, there is an electrical problem. Be sure to have
it fixed.
Power Windows and Other Power Options
Circuit breakers protect the power windows and power
seats. When the current load is too heavy, the circuit
breaker opens and closes, protecting the circuit until the
problem is fixed or goes away.

6-68
Minifuses Usage
1 Assembly Line Diagnostic Link
2 Accessory
3 Windshield Wipers
4 Not UsedMinifuses Usage
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
12 Fog
13 Transmission
14 Cruise Control
15 Coil Module
16 Injector Bank #2
17 Not Used
18 Not Used
19 Powertrain Control
Module Ignition

6-69
Minifuses Usage
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
Micro Relays Usage
27 Headlamp High Beam
28 Headlamp Low Beam
29 Fog Lamps
30 Daytime Running Lamps
31 Horn
32 Air Conditioner Clutch
Mini Relays Usage
33 Not Used
34 AccessoryMini Relays Usage
35 Not Used
36 Starter 1
37 Cooling Fan Secondary
38 Ignition 1
39 Cooling Fan Series/Parallel
40 Cooling Fan Primary
Maxibreaker Usage
41 Starter
MaxiFuses Usage
42 Not Used
43 Not Used
44 Anti
-Lock Brake System
45 Air Pump
46 Cooling Fan Secondary
47 Cooling Fan Primary
The spare fuses are located in numbers 48 through 52.
The fuse puller is located in number 53.