2003 CADILLAC CTS fuse

6-60 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 fires 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 ªborrowº 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.Underhood Fuse BlockThe underhood fuse block is located in the engine
compartment on the passenger's side of the vehicle. See
ªEngine Compartment Overviewº in the Index 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.

6-62
Relays Usage
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
BODY W/H Wiring Harness Connection
ENG W/H Engine Wiring Harness
ConnectionJ Cases Usage
R REAR RRPDB (Passenger's Side Rear
Power Distribution Box)
R REAR RRPDB (Passenger's Side Rear
Power Distribution Box)
L REAR LRPDB (Driver's Side Rear
Power Distribution Box)
L REAR LRPDB (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
EBCM Electronic Brake Control Module
Mini Fuses Usage
RT PARK Passenger's Side Taillamp
Assembly, Front Sidemarker and
Front Parking Lamp Assembly
HORN Dual Horn Assembly

6-63
Mini Fuses Usage
LT HI BEAM Driver's Side High
-Beam
Headlamp
LT LOW BEAM Driver's Side Low
-Beam
Headlamp
RT LOW BEAM Passenger's Side Low
-Beam
Headlamp
RT HI BEAM Passenger's Side High
-Beam
Headlamp
SPARE Not Used
SPARE Not Used
THEFT ECM (Electronic Control
Module), TCM (Transmission
Control Module), PASS
-Key III+
Module
LT PARK Driver's Side Taillamp Assembly,
Front Sidemarker and Front
Parking Lamp Assembly
LIC/DIMMING Rear License Plate
Assembly, DIMMini Fuses Usage
DIM/ALDL DIM, ALDL (Assembly Line
Data Link)
FLASHER Turn Signal/Hazard Flasher
Module
MANIFOLD Manifold Flaps 1 and 2, Air Mass
Meter, Canister Purge Valve
STRG CTLS Steering 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 NOZ Driver's and Passenger's Side
Heated Washer Nozzles
ECM Electronic Control Module
TCM/IPC TCM, ECM and IPC
(Instrument Panel Cluster)
SPARE Not Used
IGN MOD Front Bank Ignition Modules

6-64
Mini Fuses Usage
ELEC PRNDL Electronic PRNDL
TCC/ET TCC/ET Brake Switch (Extended
Travel), TCC/ET Brake Switch
(Cruise Disable)
STOP LP SW Stop Lamp Switch
IGN SW Ignition Switch (Power to IGN
-3
and CRANK)
VOLT CHECK DIM (Dash Integration Module)
ECM/TCM TCM (Transmission Control
Module), ECM (Electronic
Control Module), IPC (Instrument
Panel Cluster), PASS
-Key III+
Module
WPR MOD Windshield Wiper Module
Assembly
INJ Fuel Injectors
COMP
CLUTCHCompressor Clutch
WPR SW Windshield Wiper/Washer SwitchMini Fuses Usage
FOG LAMP Fog Lamps
OUTLET Center Console Accessory
Power Outlet
POST 02 Driver's and Passenger's Side
Oxygen Sensors, LRPDB
(Pusher Cooling Fan Relay)
I/P OUTLET Instrument Panel Accessory
Power Outlet
CCP Climate Control Panel
PRE 02 Driver's and Passenger's Side
Oxygen Sensors, Transmission
Output Speed Sensor
SPARE Not Used
SPARE Not Used
SPARE Not Used
Circuit
BreakersUsage
HDLP WASH
C/B
- OPTHeadlamp Washer Motor (Option)

6-65
Removing the Rear Seat Cushion
NOTICE:
A fuse center is located under the rear seat
cushion. To help avoid damage to the fuse
center, be careful when removing or reinstalling
the seat cushion.
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

6-67
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.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 ªRemoving the Rear Seat Cushionº
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.

6-68
Relays Usage
SPARE Not Used
SPARE Not Used
SPARE Not Used
PUSHER FAN Pusher Fan (Export Only)
L POSITION
RELAY MICRODriver's Side Position Lamp
R POSITION
RELAY MICROPassenger's Side Position Lamp
IGN 3 RELAY
MICROHeated Seat Modules, Air Inlet
Motor, Shifter Assembly
STANDING
LAMP RLY
MICROControl for Position Lamp RelaysRelays Usage
TRK DR REL
SOL RELAY
MICROTrunk Release Motor
REV LAMP
RELAY MICROISRVM (Inside Rearview Mirror),
License Plate Lamp Assembly
Minifuses Usage
L FRT HTD
SEAT MODDriver's Heated Seat Module
MEM/ADAPT
SEATDriver's Power Seat Switch,
Memory Seat Module
TRUNK DR
RELEASETrunk Release Motor
REVERSE
LAMPISRVM (Inside Rearview Mirror),
License Plate Lamp Assembly
SPARE Not Used
POSITION
LAMPTaillamp Assemblies, Front
Position Lamp Assemblies
SPARE Not Used
SPARE Not Used
AUDIO Radio, OnStar Module

6-69
Minifuses Usage
SPARE Not Used
REAR DR MOD Rear Door Modules
SPARE Not Used
DRIVER DR
MODDriver's Door Module
SPARE Not Used
HDLP
LEVELINGHeadlamp Leveling System
Chassis Sensors (Export Only)
EBCM EBCM (Electronic Brake
Control Module)
CCP CCP (Climate Control Panel)
IGN 3 Heated Seat Modules, Air Inlet
Motor, Shifter Assembly
J Cases Usage
AMP Audio Amplifier
PUSHER FAN Pusher Fan (Export Only)
Circuit
BreakersUsage
SEAT C/B Power Seat Switches, Memory
Seat ModuleRear Underseat Fuse Block (Passenger's Side)
The passenger's side rear fuse block is located under the
rear seat on the passenger's side of the vehicle. The rear
seat cushion must be removed to access the rear fuse
block. See ªRemoving the Rear Seat Cushionº
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.