2004 CADILLAC CTS V Owners Manual

Vehicle Identication
Vehicle Identication Number (VIN)
This is the legal identier for your vehicle. It appears on
a plate in the front corner of the instrument panel, on
the driver’s side. You can see it if you look through the
windshield from outside your vehicle. The VIN also
appears on the Vehicle Certication and Service Parts
labels and the certicates of title and registration.
Engine Identication
The 8th character in your VIN is the engine code. This
code will help you identify your engine, specications
and replacement parts.
Service Parts Identication Label
You’ll nd this label in the trunk. It’s very helpful if you
ever need to order parts. On this label is:
your VIN,
the model designation,
paint information and
a list of all production options and special equipment
Be sure that this label is not removed from the vehicle.
5-99

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 air bag system. Before attempting to
add anything electrical to your vehicle, seeServicing
Your Airbag-Equipped Vehicle on page 1-58.
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.
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 xed or goes away.
Fuses and Circuit Breakers
The wiring circuits in your vehicle are protected from
short circuits by a combination of fuses and circuit
breakers. This greatly reduces the chance of res
caused by electrical problems.
Look at the silver-colored band inside the fuse. If the
band is broken or melted, replace the fuse. Be sure you
replace a bad fuse with a new one of the identical
size and rating. If a fuse blows, see your dealer
for service immediately.
If you ever have a problem on the road and don’t have
a spare fuse, you can “borrow” one that has the
same amperage. Pick some feature of your vehicle that
you can get along without – like the radio or cigarette
lighter – and use its fuse, if it is the correct amperage.
Replace it as soon as you can.
The fuses are located in three fuse blocks, one located
in the engine compartment on the passenger’s side
and the other two under the rear seat.
5-100

Underhood Fuse Block
The underhood fuse block is located in the engine
compartment on the passenger’s side of the vehicle.
SeeEngine Compartment Overview on page 5-12
for more information on location.
To access the fuses, push in the two tabs located on
each side of the fuse block cover. Then lift the cover off.
Relays Usage
LO SPEED FAN
RELAY MINILow Speed Fan Motor
HI SPEED FAN
RELAY MINIHigh Speed Fan Motor
ACCESSORY
RELAY MINIAccessory Power Outlets
S/P FAN
RELAY MINISeries/Parallel Fan
PARK LAMP
RELAY MICROParking Lamps
5-101

Relays Usage
HORN RELAY
MICROHorn
HI BEAM
RELAY MICROHigh-Beam Headlamps
DRL RELAY
MICRO-OPTDaytime Running Lamps
LO BEAM
RELAY/HID
MINI-OPTLow-Beam HID Headlamps
HDLP WASH
RELAY MINI-OPTHeadlamp Washer Motor
SPARE Not Used
BLOWER
RELAY MINIFront Blower
FOG LAMP
RELAY MICROFog Lamps
MAIN RELAY
MICROPowertrain/ECM
STARTER
RELAY MINIStarter Solenoid
CMP CLU
RELAY MICROCompressor Clutch
IGN-1 RELAY
MICROIgnition Switch (ON)Wiring
HarnessesUsage
BODY W/H Wiring Harness Connection
I/P W/H Wiring Harness Connection
ENG W/H Engine Wiring Harness Connection
FORWARD
LAMPForward Lamp 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
5-102

Fuses Usage
RT PARKPassenger’s Side Taillamp
Assembly, Front Sidemarker and
Front Parking Lamp Assembly
HORN Dual Horn Assembly
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
SPARE Not Used
SPARE Not Used
THEFTECM (Electronic 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)
Fuses Usage
FLASHER Turn Signal/Hazard Flasher Module
ECM Electronic Control Module
STRG CTLSSteering Wheel Control Pad,
Headlamp Switch
HTR VLV/
CLTCHHeater Valve, Clutch Switch
(Normal Closed), Clutch Switch
(Normal Open), Jumper to Start
Relay Coil for Automatic
Transmission
WASH NOZDriver’s and Passenger’s Side
Heated Washer Nozzles
PRE O2/CAMDriver’s & Passenger’s Side Oxygen
Sensors, Transmission Output
Speed Sensor, CAM Phaser
TCM/IPCTCM, ECM and IPC
(Instrument Panel Cluster)
SPARE Not Used
IGN MOD/MAF Front Bank Ignition Modules
ELEC PRNDL Electronic PRNDL
SPARE Not Used
SPARE Not Used
5-103

Fuses Usage
IGN SWIgnition Switch (Power to IGN-3
and CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCMTCM (Transmission Control Module),
ECM (Electronic Control Module),
IPC (Instrument Panel Cluster),
PASS-Key
®III+ Module
WPR MOD Windshield Wiper Module Assembly
ODD INJ/
COILSOdd Ignition Coils, Fuel Injectors,
Odd Injection Coils
COMP CLUTCH Compressor Clutch
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)
Fuses Usage
I/P OUTLETInstrument Panel Accessory
Power Outlet
CCP Climate Control
EVEN INJ/
COILSEven Injection Coils
SPARE Not Used
SPARE Not Used
SPARE Not Used
Circuit
BreakersUsage
HDLP WASH
C/B-OPTHeadlamp Washer Motor
5-104

Removing the Rear Seat Cushion
Notice:If, when removing or reinstalling the
rear seat, you do not do it carefully, you could
damage the fuse center. Avoid contact between
the rear seat and the fuse center whenever
you remove or reinstall the rear seat.
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.
3. Slide the cushion out one of the rear doors and
set it aside.
Rear Pass-Through Seat
5-105

{CAUTION:
A safety belt that is not properly routed
through the seat cushion or is twisted will not
provide the protection needed in a crash.
CAUTION: (Continued)
CAUTION: (Continued)
If the safety belt has not been routed through
the seat cushion at all, it will not be there to
work for the next passenger. The person
sitting in that position could be badly injured.
After reinstalling the seat cushion, always
check to be sure that the safety belts are
properly routed and are not twisted.
To reinstall the rear seat cushion, do the following:
1. Position the seat cushion so that you can route
the safety belts through the proper slots in the
seat cushion.
2. Slide the rear of the cushion up and under the
seatback so the rear-locating guides hook into
the wire loops on the back frame.
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. Split-Folding Rear Seat
5-106