Cadillac CTS 2003 Fuse Box Info
Passenger compartment fuse box location:
The fuse boxes are located under the rear seat of the vehicle.
Engine compartment fuse box location:
Fuse Box Diagram | Layout
Passenger compartment fuse box (Driver’s Side):
| Fuse/Relay Name | Functions |
| 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 MICRO | Heated Seat Modules, Air Inlet Motor, Shifter Assembly |
| STANDING LAMP RLY MICRO | Control for Position Lamp Relays |
| TRK DR REL SOL RELAY MICRO | Trunk Release Motor |
| REV LAMP RELAY MICRO | ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly |
| L FRT HTD SEAT MOD | Driver’s Heated Seat Module |
| MEM/ADAPT SEAT | Driver’s Power Seat Switch, Memory Seat Module |
| TRUNK DR RELEASE | Trunk Release Motor |
| REVERSE LAMP | ISRVM (Inside Rearview Mirror), License Plate Lamp Assembly |
| SPARE | Not Used |
| POSITION LAMP | Taillamp Assemblies, Front 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 LEVELING | Headlamp 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 |
| AMP | Audio Amplifier |
| PUSHER FAN | Pusher Fan (Export Only) |
| SEAT C/B | Power Seat Switches, Memory Seat Module |
Passenger compartment fuse box (Passenger’s Side):
| Fuse/Relay Name | Functions |
| 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 FOG LAMP | 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 SEAT MOD | Passenger’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 VENT | Canister Vent Solenoid |
| SPARE | Not Used |
| DR MOD PWR C/B | Door Modules |
| REAR DEFOG | Rear Window Defogger Element |
| SUNROOF MOD | Power Sunroof Module |
| 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 |
Engine compartment fuse box:
| Fuse/Relay Name | Functions |
| LO SPEED FAN RELAY MINI | Low Speed Fan Motor |
| HI SPEED FAN RELAY MINI | 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 |
| FOG LAMP 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 |
| 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 |
| 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 |
| EPARE | 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 VLV/CLTCH | Heater 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 |
| 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 CLUTCH | Compressor Clutch |
| WPR SW | Windshield Wiper/Washer Switch |
| 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 |
| HDLP WASH C/B - OPT | Headlamp Washer Motor (Option) |
