Cadillac CTS (2003-2007) fuses and relays

Fuse box diagram (location and assignment of electrical fuses and relays) for Cadillac CTS (2003, 2004, 2005, 2006, 2007).

Fuse box diagram: Cadillac CTS (2003-2007)

Fuse Box in the engine compartment

The location of the fuses in the engine compartment: Cadillac CTS (2003, 2004, 2005, 2006, 2007)

Fuse box diagram (Engine compartment)

2003-2004Under-hood fuse box diagram: Cadillac CTS (2003, 2004)

2005-2007Under-hood fuse box diagram: Cadillac CTS (2005, 2006, 2007)

Assignment of the fuses and relays in the Engine compartment fuse box
Fuse/Relay nameDescription
Fuses
RT PARKPassenger’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
HORNDual Horn Assembly
LT HI BEAMDriver’s Side High-Beam Headlamp
LT LOW BEAMDriver'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
SPARENot Used
THEFTECM (Electronic Control Module), TCM (Transmission Control Module), PASS-Key 111+ Module
LT PARKDriver’s Side Taillamp Assembly, Front Sidemarker and Front Parking Lamp Assembly
LIC/DIMMING /
DIMMING
Rear License Plate Assembly, Dash Integrated Module (DIM)
DIM/ALDLDIM, ALDL (Assembly Line Data Link)
FLASHERTurn Signal/Hazard Flasher Module
MANIFOLDManifold Flaps 1 and 2, Air Mass Meter, Canister Purge Valve
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, CAM Phaser, Canister Purge
ECMElectronic Control Module
TCM/IPCTCM, ECM and IPC (Instrument Panel Cluster)
IGN MOD /
IGN MOD/MAF
Front Bank Ignition Modules
ELEC PRNDLElectronic PRNDL
TCC/ETTCC/ET Brake Switch (Extended Travel), TCC/ET Brake Switch (Cruise Disable)
STOP LP SWStoplamp Switch
IGN SWIgnition Switch (Power to IGN-3 and CRANK)
VOLT CHECKDIM (Dash Integration Module)
ECM/TCMTCM (Transmission Control Module), ECM (Electronic Control Module), IPC (Instrument Panel Cluster), PASS-Key 111+ Module
ODD INJ/COILSOdd Ignition Coils, Fuel Injectors, Odd Injection Coils
WPR MODWindshield Wiper Module Assembly
INJFuel Injectors
COMP CLUTCHCompressor Clutch
WPR SWWindshield WiperA/Vasher Switch
FOG LAMPFog Lamps
OUTLETCenter Console Accessory Power Outlet
POST O2Driver’s and Passenger’s Side Oxygen Sensors, LRPDB (Pusher Cooling Fan Relay)
I/P OUTLETInstrument Panel Accessory Power Outlet
CCPClimate Control
EVEN INJ/COILSEven Injection Coils
PRE O2Driver’s and Passenger’s Side Oxygen Sensors, Transmission Output Speed Sensor
Circuit Breakers
HDLP WASH C/B-OPTHeadlamp Washer Motor (Optional)
J-Case fuses
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 FANHigh Cooling Fan Motor
LO FANLow Cooling Fan Motor
BLOWERPWM Fan Motor Assembly
STARTERStarter Solenoid
EBCMElectronic Brake Control Module
ABSAnti-Lock Brake System
Wiring Harnesses
BODY W/HWiring Harness Connection
I/P W/HWiring Harness Connection
ENG W/HEngine Wiring Harness Connection
FORWARD LAMPForward Lamp Wiring Harness Connection
Relays
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
HORN RELAY MICROHorn
HI BEAM RELAY MICROHigh-Beam Headlamps
DRL RELAY MICRO-OPTDaytime Running Lamps
LO BEAM RELAY/HID MINI-OPTLow-Beam HID Headlamps (Option)
HDLP WASH RELAY MINI-OPTHeadlamp Washer Motor (Option)
CIGAR RELAY MINICigarette Lighter (Option)
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)

Passenger compartment fuse boxes

Two fuse boxes are located under the rear seat
The location of the fuses in the passenger compartment: Cadillac CTS (2003, 2004, 2005, 2006, 2007)

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.

Fuse box diagram (Rear Underseat Fuse Block, Driver’s Side)

Rear Underseat Fuse Block, Driver’s Side: Cadillac CTS (2003, 2004, 2005, 2006, 2007)

Assignment of the fuses and relays in the Rear Underseat Fuse Block (Driver’s Side)
Fuse/Relay nameDescription
Fuses
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
SPARENot Used
POSITION LAMPTaillamp Assemblies, Front Position Lamp Assemblies
AUDIORadio, OnStar Module
REAR DR MODRear Door Modules
BASTaillamps, Center High-Mounted Stoplamp, Flasher Module, ABS Module, Trailer Lamps
DRIVER DR MODDriver’s Door Module
HDLP LEVELINGHeadlamp Leveling System Chassis Sensors (Export Only)
EBCMEBCM (Electronic Brake Control Module)
CCPCCP (Climate Control Panel)
IGN 3Heated Seat Modules, Air Inlet Motor, Shifter Assembly
J-case fuses
AMPAudio Amplifier
PUSHER FANPusher Fan (Export Only)
Circuit Breakers
SEAT C/BPower Seat Switches, Memory Seat Module
Relays
BAS RELAY MINIBrake Apply Sensor
SPARENot Used
PUSHER FANPusher 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 Relays
TRK DR REL SOL RELAY MICROTrunk Release Motor
REV LAMP RELAY MICROISRVM (Inside Rearview Mirror), License Plate Lamp Assembly

Fuse box diagram (Rear Underseat Fuse Block, Passenger’s Side)

2003-2004Rear Underseat Fuse Block, Passenger’s Side: Cadillac CTS (2003, 2004)

2005-2007Rear Underseat Fuse Block, Passenger’s Side: Cadillac CTS (2005, 2006, 2007)

Assignment of the fuses and relays in the Rear Underseat Fuse Block (Passenger’s Side)
Fuse/Relay nameDescription
Fuses
TRUNK DIODETrunk Lamp
INTERIOR LAMPHush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
PSGR DR MODRight Front Passenger Door Module
RIM2003-2004: RIM (Rear Integration Module), Ignition Switch, Key Lock Cylinder
2005-2007: ISRVM (Inside Rearview Mirror), Power Sounder, RIM
RIM/IGN SWRIM (Rear Integration Module), Ignition Switch, Key Lock Cylinder
REAR FOG LAMPRear Fog Lamps (Export Only)
SPARENot Used
NAVTV Tuner Assembly (Export Only), VICS (Vehicle Information Communication System) Module (Export Only)
AIR BAGSDM (Sensing Diagnostic Module)
SPARENot Used
POWER SOUNDERPower Sounder, Inclination Sensor
ABSAnti-Lock Brake System
TRUNK LAMPTrunk Lamp
FUEL PUMP MTRFuel Pump Motor
AFTERBOILAfterboil Heater Pump
R FRT HTD SEAT MODPassenger’s Side Heated Seat Module
SPARENot Used
SIRSDM (Sensing Diagnostic Module)
RIMISRVM (Inside Rearview Mirror), Power Sounder, RIM, Passive Trunk Release Sensor
CANISTER VENTCanister Vent Solenoid
SPARENot Used
Circuit Breakers
DR MOD PWR C/BDoor Modules
J-Case fuses
REAR DEFOGRear Window Defogger Element
SUNROOF MODPower Sunroof Module
Relays
RAP RELAY MINIRetained Accessory Power
SPARENot Used
REAR DEFOG RELAY MINIRear Window Defogger
SPARENot 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
Cadillac CTS (2003-2007) fuses and relays December 10, 2018 admin