2003 CADILLAC CTS ignition

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)

6-70
Minifuses Usage
INTERIOR
LAMPHush Panel Lamps, Puddle
Lamps, Overhead Courtesy
Lamp Assembly
PSGR DR MOD Right Front Passenger
Door Module
RIM RIM (Rear Integration Module),
Ignition Switch, Key Lock
Cylinder
REAR
FOG LAMPRear Fog Lamps (Export Only)
SPARE Not Used
NAV TV Tuner Assembly (Export
Only), VICS (Vehicle Information
Communication System) ModuleMinifuses Usage
SPARE Not Used
SPARE Not Used
POWER
SOUNDERPower Sounder, Inclination Sensor
SPARE Not Used
TRUNK LAMP Trunk Lamp
FUEL
PUMP MTRFuel Pump Motor
AFTERBOIL Afterboil Heater Pump
R FRT HTD
SEAT MODPassenger's Side Heated
Seat Module
SPARE Not Used
SIR SDM (Sensing Diagnostic
Module)
RIM ISRVM (Inside Rearview Mirror),
Power Sounder, RIM, Passive
Trunk Release Sensor
CANISTER
VENTCanister Vent Solenoid
SPARE Not Used

6-71
Circuit
BreakersUsage
DR MOD
PWR C/BDoor Modules
J Cases Usage
REAR DEFOG Rear Window Defogger Element
SUNROOF
MODPower Sunroof Module
Relays Usage
RAP
RELAY MINIRetained Accessory Power
SPARE Not Used
REAR DEFOG
RELAY MINIRear Window DefoggerRelays Usage
SPARE Not Used
AFTER
BOIL MICROAfterboil Heater Pump
INT LAMP
RELAY MICROHush Panel Lamps, Puddle
Lamps, Overhead Courtesy
Lamp Assembly
IGN 1 RELAY
MICROIgnition Switch
REAR FOG
LAMP RLY
MICRORear Fog Lamps (Export Only)
FUEL PUMP
MOTOR RLY
MICROFuel Pump Motor

7-19
Automatic Transmission Shift Lock Control
System Check
CAUTION:
When you are doing this check, the vehicle could
move suddenly. If it does, you or others could be
injured. Follow the steps below.
1. Before you start, be sure you have enough room
around the vehicle. It should be parked on a
level surface.
2. Firmly apply the parking brake. See ªParking Brakeº
in the Index if necessary.
Be ready to apply the regular brake immediately if
the vehicle begins to move.3. With the engine off, turn the key to the ON position,
but don't start the engine. Without applying the
regular brake, try to move the shift lever out of
PARK (P) with normal effort. If the shift lever
moves out of PARK (P), your vehicle needs service.
Ignition Automatic Transmission Lock Check
While parked, and with the parking brake set, try to
turn the ignition key to OFF in each shift lever position.
The key should turn to OFF only when the shift lever is
in PARK (P).
On all vehicles, the key should come out only in OFF.