The Cadillac DeVille from 1994 continued the legacy of being a luxurious and spacious sedan, known for its comfort and advanced features during its era. Its electrical system, which includes the fuse box and relay components, played a critical role in ensuring the vehicle’s functionality and reliability.
The fuse box in the 1994 Cadillac DeVille housed various fuses designed to protect specific electrical circuits throughout the car. These circuits powered essential components such as the engine control module, lighting systems, climate control, entertainment features, and more. Fuses were crucial as they would interrupt the electrical flow in case of an overload or short circuit, preventing damage to sensitive components.
Relays in the 1994 Cadillac DeVille served as electrically operated switches that controlled high-current circuits. They enabled precise activation and deactivation of functions like the starter motor, fuel pump, air conditioning compressor, and power windows or seats. Efficient management of power distribution by relays contributed significantly to the overall performance and reliability of the vehicle.
Regular inspection and maintenance of the fuse box and relays were necessary to ensure the Cadillac DeVille operated smoothly. This involved checking fuses for signs of wear or damage, ensuring secure relay connections, and promptly addressing any electrical issues that arose. Proper care of these components helped maintain the vehicle’s electrical integrity, enhancing safety and driving satisfaction for owners of the 1994 Cadillac DeVille.
MUST READ: DYI – How to Check Car Fuses?
(1994) Cadillac DeVille fuse box and relay with Diagram
WARNING
- Never replace a fuse with one that has a higher amperage rating.
- A fuse with a too-high amperage could damage the electrical part and cause a fire.
- On no account should fuses be repaired (e.g. patched up with tin foil or wire) as this may cause serious damage elsewhere in the electrical circuit or cause a fire.
- If a fuse blows repeatedly, do not keep replacing it. Instead, have the cause for the repeated short circuit or overload tracked and fixed.
- Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.
Cadillac DeVille 1994 fuse assignment
- Cigar lighter / power outlet fuses in the Cadillac DeVille are the fuses №. 22 and 23 in the Engine compartment fuse box and fuse №65 in the Rear Underseat fuse box.
Year of production: 1994
Engine compartment fuse block
The maxi fuse and relays are located next to the engine compartment fuse block.
| Fuse name | Ampere rating [A] | Usage |
| DISTR | 20 | IGNITION CONTROL MODULE |
| SIR | 20 | DIAGNOSTIC/ENERGY RESERVE MODULE (DERM) , DUAL POE ARMING SENSOR |
| PCM (IGN) | 10 | POWERTRAIN CONTROL MODULE (PCM), PASS-Key@ DECODER MODULE |
| INJ | 10 | 1,4,6, AND 7 FUEL INJECTORS |
| INJ | 10 | 2,3,5, AND 8 FUEL INJECTORS |
| IGN 1 | 10 | A/C REFRIGERANT PRESSURE SWITCH, TRANSAXLE RANGE SWITCH, STOP/BTSI/CRUISE BRAKE SWITCH, INSTRUMENT PANEL CLUSTER, KEYLESS ENTRY MODULE, DIAGNOSTIC/ENERGY RESERVE MODULE (DERM), CORNERING LIGHTS, TURN/HAZARD SWITCH ASSY, CHIME MODULE, HEADLIGHT SWITCH, TWILIGHT SENTINEUDRL MODULE |
| FUEL PUMP | 20 | FUEL PUMP, OIL PRESSURE SWITCH, POWERTRAIN CONTROL MODULE (PCM) |
| PCM (BAT) | 10 | P6WERTRAIN CONTROL MODULE (PCM) |
| RTD (BAT) | 20 | ROAD SENSING SUSPENSION (RSS) MODULE |
| A/C COMP | 10 | A/C COMPRESSOR CLUTCH |
| HDLPS | 30 | HEADLIGHT DIMMER SWITCH, HEADLIGHT RELAY “D” (ENGINE COMP MICRO RELAY CENTER), DRL HEADLIGHT RELAY “E (WITH DAYTIME RUNNING LIGHTS), POWERS C13 |
| STOP LP | 20 | STOP/BTSI/CRUISE SWITCH, STOPLIGHT SWITCH CAPACITOR |
| TURN/HAZ | 20 | HAZARD FLSHER, TURN FLASHER RELAY, TURN FLASHER MODULE |
| DRL (CANADA) | 10 | DAYTIME RUNNING LIGHTS (CANADA) |
| DRL (CANADA) | 10 | LEFT AND RIGHT LO BEAM HEADLAMP |
| HTD W/S | 10 | HEATED WINDSHIELD CONTROL MODULE |
| LR STRUT | 10 | LEFT REAR STRUT |
| RR STRUT | 10 | RIGHT REAR STRUT |
| LF STRUT | 10 | LEFT FRONT STRUT |
| RF STRUT | 10 | RIGHT FRONT STRUT |
| L HDLP LO | 10 | LEFT LO BEAM HEADLAMP |
| R HDLP LO | 10 | RIGHT LO BEAM HEADLAMP |
| L HDLP HI | 10 | LEFT HI BEAM HEADLAMP |
| R HDLP HI | 10 | RIGHT HI BEAM HEADLAMP |
| IGN 3 | 10 | REAR DEFOGGER RELAY, ELECTRONIC LEVEL CONTROL (ELC), HEATED WINDSHIELD, HEATER AND A/C PROGRAMMER, CRUISE CONTROL |
| COOLING FAN | 10 | EXTENDED TRAVEL BRAKE SWITCH, POWERTRAIN CONTROL MODULE (PCM), COOLING FANRELAYS 1,2, AND 3, FRONT AND REAR HEATED OXYGEN SENSOR |
| TRANS/ECS | 10 | OVERSPEED ALERT MODULE (EXPORT), POWER STEERING PRESSURE SWITCH, EXHAUST GAS RECIRCULATION (EGR) VALVE, TRANSAXLE SHIFT SOLENOIDS A & B, EVAPORATIVE EMISSION CONTROL SOLENOID, POWERTRAIN CONTROL MODULE (PCM), TORQUE CONVERTER CLUTCH SOLENOID, TCC BRAKE SWITCH |
Maxi fuse block
LH MAXI FUSE BLOCK
| Fuse | Fuse name | Ampere rating [A] | Usage |
| 1 | (STRG 1-2) | 50 | RETAINED ACCESSORY POWER (RADIO/WIPERS), STARTER, TRUNK COMF FUSES B11 AND 813 |
| 2 | BODY | 60 | ENGINE COMF B11, ROAD SENSING SUSPENSION, FOG LIGHTS, TRUNK COMF FUSE C1, C3, C5, C7, C9, AND C11, TRUNK COMIP FUSE C13 (EXPORT), REAR FOG LIGHT (EXPORT) |
| 3 | SEAT | 30 CB | LEFT AND RIGHT LUMBAR RELAYS, POWER DOOR LOCKS, KEYLESS ENTRY MODULE, HORNS, FUEL DOOR RELEASE SWITCH, TRUNK RELEASE SWITCH |
| 4 | IPC | 30 | POWERTRAIN CONTROL MODULE (PCM), ELECTRONIC CLIMATE CONTROL, RAPALLUMINATED ENTRY MODULE, INSTRUMENT PANEL CLUSTER, PASS-Key@ DECODER MODULE, THEFT DETERRENT |
| 5 | HVAC | 60 | LEFT AND RIGHT HEATED SEATS, ELECTRONIC LEVEL CONTROL (ELC), TRUNK LID PULL DOWN, POWER ANTENNA, REAR DEFOGGER, LEFT AND RIGHT MIRROR DEFOGGERS |
| 6 | STRG 3 | 60 | RETAINED ACCESSORY POWER, (SUNROOF/POWER WINDOWS), ENGINE COMF! FUSES D1, D3, D5, TRUNK COMI? FUSES A1 , A3, A5, A7, A9 |
RH MAXI FUSE BLOCK
| Fuse | Fuse name | Ampere rating [A] | Usage |
| 1 | DAB | 30 CB | RETAINED ACCESSORY POWER (RAP) (SUNROOF/POWER WINDOWS) |
| 2 | RADIO | 30 | DELCO-BOSEB SPEAKERS, RADIO CONTROL HEAD, REMOTE RADIO RECEIVER |
| 3 | COOL | 50 | COOLING FANS |
| 4 | HVAC BLOWER (BLOWER) | 40 | HVAC POWER MOTOR, A/C COMPRESSOR |
| 5 | ABS (BRAKES) | 50 | BRAKE PRESSURE MODULATOR VALVE |
| 6 | LAMPS | 50 | TURN FLASHER MODULE, HAZARD FLASHER, STOP/BTSI/CRUISE BRAKE SWITCH, PARKING LIGHTS, DAY TIME RUNNING LIGHTS (CANADA), ENGINE COME FUSES 61, B3 AND B5, TRUNK COMF! FUSES Dl 1, Dl3 |
Trunk Compartment Fuse Block
| Fuse name | Ampere rating [A] | Usage |
| CRANK | 10 | RAP/ILLUMINATED ENTRY MODULE, DlAGNOSTIC/ENERGY RESERVE MODULE (DERM), TRANSAXLE RANGE SWITCH (NSSS) |
| IGN 1 | 10 | TRUNWFUEL DOOR RELEASE INHIBIT RELAY “E”, FUEL LEVER SENSOR, ELECTROCHROMIC MIRROR, RAP/ILLUMINATED ENTRY MODULE, THEFT DETERRENT MODULE, KEYLESS ENTRY MODULE, TURN FLASHER RELAY “F TRUNK COMP MICRO RELAY CENTER |
| HDLP WASH | 30 | EXPORT ONLY – NOT EQUIPPED |
| IPC (IGN) | 10 | INSTRUMENT PANEL CLUSTER |
| RTD SUSP | 10 | SPEED SENSITIVE SUSPENSION, ENGINE COMP MICRO RELAY CENTER RSS DAMPER RELAY “F” |
| ABS | 10 | ELECTRONIC BRAKE AND TRACTION CONTROL MODULE (EBTCM) |
| WIPER | 30 | WIPER/WASHER SWITCH |
| RAD (IGN) | 10 | REMOTE RADIO RECEIVER |
| R DEFOG | 30 | REAR DEFOGGER |
| HTD MlRR | 10 | LTAND RT OUTSIDE MIRROR DEFOGGERS |
| IPC (BATT) | 10 | INSTRUMENT PANEL CLUSTER |
| THEFT | 10 | PASS-Key@ DECODER MODULE, THEFT DETERRENT RELAY “D” (TRUNK COMP RELAY CENTER), THEFT DETERRENT MODULE |
| HVAC/DABIE | 10 | HEATER AND A/C PROGRAMMER, RAP/ILLUMINATED ENTRY MODULE |
| RADIO | 30 | ACTIVE AUDIO AMPLIFIER |
| TRAILER | 20 | NOT EQUIPPED |
| ANT | 10 | ANTENNA MOTOR |
| CIGAR | 20 | LT AND RT REAR CIGARETTE LIGHTERS, FRONT CIGARETTE LIGHTER, CHIME MODULE |
| BODY 2 | 10 | POWER MIRROR SWITCH, RAP RELAY, LOCK-OUT INHIBIT RELAY “A” (TRUNK COMP 1 MICRO RELAY CENTER), COURTESY LIGHTS RELAY “C” (TRUNK COME 2 MICRO RELAY CENTER), RAP RELAY “E (TRUNK COMP. 2 MICRO RELAY CENTER), KEYLESS ENTRY MODULE, TRUNK LAMP |
| BODY 1 | 10 | FRONT DOOR LOCK SWITCHES, FRONT DOOR COURTESY LAMP, GLOVE BOX LAMP, HEADLIGHT SWITCH |
| READ LP | 10 | LTAND AT FRONT HEADER LAMP, GARAGE DOOR OPENER, LT AND RT REAR HEADER LAMPS |
| L PRK LP | 10 | LT REAR TAIL/STOP/TURN LAMPS, LT FRONT PARK/TURN LAMPS, FRONT AND REAR LEFT SIDE MARKER LAMPS, RT REAR MARKER LAMP, HEADLIGHT SWITCH, INSTRUMENT PANEL CLUSTER |
| R PRK LP | 10 | RADIO CONTROL HEAD, RT TAIUSTOP TURN LAMPS, RT FRONT AND REAR SIDE MARKER LAMPS, RT FRONT PARK AND TURN LAMPS, ENGINE COME LAMP, LICENSE PLATE LAMPS |
| RAD (BAT) | 10 | RADIO |
| TRUNK PLD | 20 | TRUNK LID PULL DOWN MOTOR |
| ELC | 30 | ELECTRONIC LEVEL CONTROL (ELC) |
| R HTD SEAT | 10 | PASSENGERS HEATED SEAT |
| L HTD SEAT | 10 | DRIVER’S HEATED SEAT |
Conclusion
For owners and enthusiasts of classic Cadillac DeVille 1994, understanding the fuse box and relay systems is essential for vehicle maintenance. Regular inspection and maintenance of these components helped ensure the vehicle’s longevity and reliability, preserving its status as a symbol of Cadillac’s craftsmanship and innovation in the automotive industry during that era.
