2003-2007 Cadillac CTS Fuse Box Location Chart

Has the radio, cigarette outlet, or light stopped working? If yes, there is a good chance your Cadillac CTS has a blown fuse. Here is a list of fuses and designations for the Cadillac CTS.

Engine Bay Fuse Block

One fuse block is located in the engine compartment. The fuses in this picture are located on the passenger side of the engine bay. Look right behind the headlight on the passenger side.

RELAY / FUSE	USAGE
LO SPEED FAN	Low-Speed Fan Motor
HI-SPEED FAN	High Speed Fan Motor
ACCESSORY RELAY MINI	Accessory Power Outlets
S/P FAN RELAY MINI	Series/Parallel Fan
PARK LAMP RELAY MICRO	Parking Lamps
HORN RELAY MICRO	Horn
HI BEAM RELAY MICRO	High-Beam Headlamps
DRL RELAY MICRO  OPT	Daytime Running Lamps
LO BEAM RELAY/HID MINI  OPT	Low-Beam HID Headlamps (Option)
HDLP WASH RELAY MINI  OPT	Headlamp Washer Motor (Option)
CIGAR RELAY MINI	Cigarette Lighter (Option)
BLOWER RELAY MINI	Front Blower
FOGLAMP RELAY MICRO	Fog Lamps
MAIN RELAY MICRO	Powertrain/ECM
STARTER RELAY MINI	Starter Solenoid
CMP CLU RELAY MICRO	Compressor Clutch
IGN-1 RELAY MICRO	Ignition Switch (ON)
BODY W/H	Wiring Harness Connection
BODY W/H	Wiring Harness Connection
ENG W/H	Engine Wiring Harness Connection
RT PARK	Passenger’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 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, DIM
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	Heater Valve, Clutch Switch
VLV/CLTCH	(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)
IGN MOD	Front Bank Ignition Modules
ELEC PRNDL	Electronic PRNDL
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	Compressor Clutch
CLUTCH
WPR SW	Windshield Wiper/Washer Switch
FOG LAMP	Fog Lamps
OUTLET	Center Console Accessory Power Outlet
POST 02	Driver 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 and Passenger’s Side Oxygen Sensors, Transmission Output Speed Sensor
SPARE	Not Used
SPARE	Not Used
SPARE	Not Used
HDLP WASH C/B ? OPT	Headlamp Washer Motor (Option)
J Cases	Usage
R REAR	RRPDB (Passenger Side Rear Power Distribution Box)
R REAR	RRPDB (Passenger Side Rear Power Distribution Box)
L REAR	LRPDB (Driver Side Rear Power Distribution Box)
L REAR	LRPDB (Driver 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

Fuse Block Interior Under Rear Seat (Driver Side)

The interior fuses are located inside under the rear seat. To locate the fuses, remove the rear seat. To remove the rear seat cushion, you should see a cushion release in the front part of the rear seat cushion. Once you pull on the release, pull the cushion up. Remove the seat cushion.

Relays	Usage
SPARE	Not Used
SPARE	Not Used
SPARE	Not Used
PUSHER FAN	Pusher Fan (Export Only)
L POSITION RELAY MICRO	Driver’s Side Position Lamp
R POSITION RELAY MICRO	Passenger’s Side Position Lamp
IGN 3 RELAY	Heated Seat Modules, Air Inlet
MICRO	Motor, Shifter Assembly
STANDING LAMP RLY MICRO	Control for Position Lamp Relays

Relays	Usage
TRK DR REL SOL RELAY MICRO	Trunk Release Motor
REVLAMP	ISRVM (Inside Rearview Mirror).
RELAY MICRO	License Plate Lamp Assembly
Minifuses	Usage
L FRT HTD   SEAT MOD	Driver’s Heated Seat Module
MEM/ADAPT	Driver’s Power Seat Switch,
SEAT	Memory Seat Module
TRUNK DR RELEASE	Trunk Release Motor
REVERSE	ISRVM (Inside Rearview Mirror).
LAMP	License Plate Lamp Assembly
SPARE	Not Used
POSITION	Taillamp Assemblies, Front
LAMP	Position Lamp Assemblies
SPARE	Not Used
SPARE	Not Used
AUDIO	Radio, OnStar Module

SPARE	Not Used
REAR DR MOD	Rear Door Modules
SPARE	Not Used
DRIVER DR MOD	Driver’s Door Module
SPARE	Not Used
HDLP	Headlamp Leveling System
LEVELING	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
AMP	Audio Amplifier
PUSHER FAN	Pusher Fan (Export Only)
SEAT C/B	Power Seat Switches, Memory Seat Module

Fuse Block Interior Under Rear Seat (Passenger Side)

The interior fuses are located inside under the rear seat. To locate the fuses, remove the rear seat. To remove the rear seat cushion, you should see a cushion release in the front part of the rear seat cushion. Once you pull on the release, pull the cushion up. Remove the seat cushion.

Mini fuses	Usage
INTERIOR   LAMP	Hush 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   FOGLAMP	Rear Fog Lamps (Export Only)
SPARE	Not Used
NAV	TV Tuner Assembly (Export Only), VICS (Vehicle Information Communication System) Module

SPARE	Not Used
SPARE	Not Used
POWER   SOUNDER	Power Sounder, Inclination Sensor
SPARE	Not Used
TRUNK LAMP	Trunk Lamp
FUEL   PUMP MTR	Fuel Pump Motor
AFTERBOIL	Afterboil Heater Pump
R FRT HTD	Passenger’s Side Heated
SEAT MOD	Seat Module
SPARE	Not Used
SIR	SDM (Sensing Diagnostic   Module)
RIM	ISRVM (Inside Rearview Mirror), Power Sounder, RIM, Passive Trunk Release Sensor
CANISTER   VENT	Canister Vent Solenoid
SPARE	Not Used

DR MOD   PWR C/B	Door Modules
J Cases	Usage
REAR DEFOG	Rear Window Defogger Element
SUNROOF   MOD	Power Sunroof Module
Relays	Usage
RAP   RELAY MINI	Retained Accessory Power
SPARE	Not Used
REAR DEFOG RELAY MINI	Rear Window Defogger

SPARE	Not Used
AFTER   BOIL MICRO	Afterboil Heater Pump
INT LAMP RELAY MICRO	Hush Panel Lamps, Puddle Lamps, Overhead Courtesy Lamp Assembly
IGN 1 RELAY MICRO	Ignition Switch
REAR FOG LAMP RLY MICRO	Rear Fog Lamps (Export Only)
FUEL PUMP MOTOR RLY MICRO	Fuel Pump Motor

You can easily identify blown fuses by looking at them. Bad fuses will have the wire between the two posts disconnected. For more help, check out the article on Easy Ways to Check for a Blown Fuse. 

If your Cadillac CTS doesn’t start or a warning light is staying on, check out our guide on how to Diagnose Vehicle Problems Like a Pro.

We hope you find the 2003-2007 Cadillac CTS Fuse Box Location Chart guide helpful. Check these troubleshooting and repair guides for more help on your Cadillac.