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.
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| 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, Puddle, and 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.
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