2007 CADILLAC CTS V headlamp

7. Locate the vertical headlamp aiming screws,
which are under the hood near each headlamp
assembly.
The adjustment screw can be turned with
a 6 mm hex socket.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.
Passenger’s Side Shown
385

Bulb Replacement
For the proper type of replacement bulbs, see
Replacement Bulbs on page 389.
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
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.
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.
386

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.
SeeChanging a Flat Tire (CTS Only) on page 424
for more information.
Used Replacement Wheels
{CAUTION:
Putting a used wheel on your vehicle is
dangerous. You cannot know how it has
been used or how far it has been driven.
It could fail suddenly and cause a crash.
If you have to replace a wheel, use a new
GM original equipment wheel.
417

Relays Usage
LO SPEED
FAN
RELAY MINILow Speed Fan Motor
HI SPEED FAN
RELAY MINIHigh Speed Fan Motor
ACCESSORY
RELAY MINIWipe-Wash
S/P FAN
RELAY MINISeries/Parallel Fan
PARK LAMP
RELAY MICROParking Lamps
Relays Usage
HORN RELAY
MICROHorn
HI BEAM
RELAY MICROHigh-Beam Headlamps
DRL RELAY
MICRO-OPTDaytime Running Lamps
LO BEAM
RELAY/HID
MINI-OPTLow-Beam Headlamps
HDLP WASH
RELAY
MINI-OPTHeadlamp Washer Motor
SPARE Not Used
BLOWER
RELAY MINIFront Blower
FOG LAMP
RELAY MICROFog Lamps
MAIN RELAY
MICROPowertrain/Engine Control
Module (ECM)
STARTER
RELAY MINIStarter Solenoid
CMP CLU
RELAY MICROCompressor Clutch
IGN-1 RELAY
MICROIgnition Switch (ON)
448

Wiring
HarnessesUsage
BODY W/H Wiring Harness Connection
BODY W/H Wiring Harness Connection
ENG W/H Engine Wiring Harness Connection
J Cases Usage
R REARRRPDB (Passenger’s Side Rear
Power Distribution Box)
R REARRRPDB (Passenger’s Side Rear
Power Distribution Box)
L REARLRPDB (Driver’s Side Rear Power
Distribution Box)
L REARLRPDB (Driver’s Side Rear Power
Distribution Box)
HI FAN High Cooling Fan Motor
LO FAN Low Cooling Fan Motor
BLOWER PWM Fan Motor Assembly
STARTER Starter Solenoid
ABS Anti-Lock Brake System
Fuses Usage
RT PARKPassenger’s Side Taillamp
Assembly, Front Sidemarker and
Front Parking Lamp Assembly
HORN Dual Horn Assembly
Fuses Usage
LT HI BEAM Driver’s Side High-Beam Headlamp
LT LOW BEAM Driver’s Side Low-Beam Headlamp
RT LOW BEAMPassenger’s Side Low-Beam
Headlamp
RT HI BEAMPassenger’s Side High-Beam
Headlamp
TOSManual Transmission Output Speed
Sensor
SPARE Not Used
THEFTECM (Engine Control Module),
TCM (Transmission Control Module),
PASS-Key
®III+ Module
LT PARKDriver’s Side Taillamp Assembly,
Front Sidemarker and Front Parking
Lamp Assembly
DIMMINGRear License Plate Assembly, Dash
Integrated Module (DIM)
DIM/ALDLDIM, ALDL (Assembly Line
Data Link)
FLASHER Turn Signal/Hazard Flasher Module
ECM Electronic Control Module
STRG CTLSTurn Signal Switch, Cruise Control
Switch
HTR VLV/
CLTCHClutch Switch (Normal Closed),
Clutch Switch (Normal Open),
Jumper to Start Relay Coil for
Automatic Transmission
449

Fuses Usage
WASH NOZDriver’s and Passenger’s Side
Heated Washer Nozzles
PRE O2/CAMDriver’s & Passenger’s Side Oxygen
Sensors, CAM Phaser, Canister
Purge
TCM/IPCTransmission Control Module,
Engine Control Module, Instrument
Panel Cluster
SPARE Not Used
IGN MOD/MAF Mass Airow Sensor
ELEC PRNDL Electronic PRNDL (Export)
SPARE Not Used
SPARE Not Used
IGN SWIgnition Switch (Power to IGN-3 and
CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCMTCM (Transmission Control Module),
ECM (Engine Control Module), IPC
(Instrument Panel Cluster),
PASS-Key
®III+ Module
WPR MOD Windshield Wiper Module Assembly
ODD INJ/COILOdd Ignition Coils, Fuel Injectors,
Odd Injection Coils
COMP CLUTCH Compressor Clutch
Fuses Usage
WPR SW Windshield Wiper/Washer Switch
FOG LAMP Fog Lamps
OUTLETCenter Console Accessory Power
Outlet
POST 02Driver’s and Passenger’s Side
Oxygen Sensors, LRPDB (Pusher
Cooling Fan Relay)
I/P OUTLETInstrument Panel Accessory Power
Outlet
CCP Climate Control
EVEN INJ/COIL Even Injection Coils
SPARE Not Used
SPARE Not Used
SPARE Not Used
SPARE Not Used
Circuit
BreakersUsage
HDLP WASH
C/B-OPTHeadlamp Washer Motor
Misc. Usage
FUSE PULLER Fuse Puller
450

3. With the seat cushion lowered, push rearward
and then press down on the seat cushion until
the seat cushion snaps into place.
4. Push and pull on the seat cushion to make
sure it is locked into place.
5. Check to make sure the safety belts are
properly routed and that no portion of any
safety belt is trapped under the seat cushion.
Rear Underseat Fuse Block
(Driver’s Side)
The driver’s side rear fuse block is located under
the rear seat on the driver’s side of the vehicle.
The rear seat cushion must be removed to access
the rear fuse block. See “Removing the Rear
Seat Cushion” listed previously.To access the fuse block, push in the two tabs
located at each end of the fuse block cover.
Then lift the cover off.
Fuses Usage
SPARE Not Used
SPARE Not Used
AUDIO Radio, OnStar Module
SPARE Not Used
REAR DR MOD Rear Door Modules
SPARE Not Used
DRIVER
DR MODDriver’s Door Module
BASTaillamps, Center High-Mounted
Stoplamp, Flasher Module, ABS
Module, Trailer Lamps
HDLP
LEVELINGHeadlamp Leveling System Chassis
Sensors (Export Only)
453

Audio Steering Wheel Controls........279, 280
Care of Your CD Player........................... 283
Care of Your CDs.................................... 283
Diversity Antenna System......................... 284
Navigation/Radio System, see
Navigation Manual................................ 279
Radio with CD......................................... 260
Setting the Time...................................... 259
Theft-Deterrent Feature............................ 279
Understanding Radio Reception............... 282
XM™ Satellite Radio Antenna System...... 284
Automatic Transmission
Fluid........................................................ 353
Operation................................................. 122
B
Battery........................................................ 375
Electric Power Management..................... 185
Exterior Lighting Battery Saver................. 183
Run-Down Protection............................... 186
Before Leaving on a Long Trip.................... 312
Brake
Emergencies............................................ 293
Parking.................................................... 128Brakes........................................................ 371
Panic Assist............................................. 298
System Warning Light.............................. 205
Braking....................................................... 290
Braking in Emergencies............................... 293
Break-In, New Vehicle................................. 116
Bulb Replacement....................................... 386
Back-Up and License Plate Lamps.......... 389
Front Turn Signal and Fog Lamps............ 387
Halogen Bulbs......................................... 386
Headlamp Aiming..................................... 383
High Intensity Discharge (HID) Lighting.... 386
Replacement Bulbs.................................. 389
Taillamps, Turn Signal, Stoplamps and
Sidemarker Lamps................................ 387
Buying New Tires........................................ 411C
Calibration................................................... 137
California Fuel............................................. 335
California Proposition 65 Warning................ 333
Canadian Owners........................................... 3
Capacities and Specications...................... 457
Carbon Monoxide..............104, 134, 316, 328
504