The Cadillac DeVille from 1993 was a prominent luxury sedan known for its comfort, spaciousness, and advanced features during its time. Its electrical system, inclusive of the fuse box and relay components, was pivotal in ensuring the vehicle’s optimal functionality and reliability.
The fuse box in the 1993 Cadillac DeVille housed various fuses aimed at safeguarding specific electrical circuits throughout the vehicle. These circuits powered crucial components such as the engine control module, lighting systems, climate control, entertainment features, and more. Fuses were essential as they would interrupt the electrical flow in the event of an overload or short circuit, thereby preventing damage to sensitive components.
Relays in the 1993 Cadillac DeVille functioned as electrically operated switches that managed high-current circuits. They facilitated the precise activation and deactivation of functions such as the starter motor, fuel pump, air conditioning compressor, and power windows or seats. Efficient distribution of power by relays contributed significantly to the vehicle’s overall performance and reliability.
Regular inspection and maintenance of the fuse box and relays were crucial to ensure the smooth operation of the 1993 Cadillac DeVille. This entailed checking fuses for signs of wear or damage, ensuring secure relay connections, and promptly addressing any electrical issues that surfaced. Proper care of these components helped preserve the vehicle’s electrical integrity, thereby enhancing safety and driving satisfaction for owners of the 1993 Cadillac DeVille.
MUST READ: DYI – How to Check Car Fuses?
(1993) 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 1993 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: 1993
Instrument panel
The fuse block is located under the instrument panel, next to the parking brake.
| Fuse | Ampere rating [A] | Usage |
| 1 | 10 | CRANK, DIAG. ENERGY RESERVE MODULE |
| 2 | 10 | SPARE |
| 3 | 15 | SPARE |
| 4 | 10 | RADIO, BODY COMPUTER MODULE |
| 5 | 25 | WSHIELD WIPE/WASH, WIPER/WASHER SWITCH |
| 6 | 10 | COOLING FAN RELAYS, HIGH SPEED COOLANT FAN, LOW SPEED COOLANT FAN |
| 7 | 20 | AIR CONDITIONIN, A/C COMPRESSOR RELAY, BODY COMPUTER MODULE, ELECTRONIC CLIMATE CONTROL, CRUISE CONTROL SWITCH, ELEC. CLIMATE CTRL PROG., ELEC. HEIGHT SENSOR, FUEL DATA CENTER, HEATED WlS CONTROL MODULE, INSTRUMENT CLUSTER, REAR DEFOGGER RELAY, WINDOW LOCKOUT SWITCH |
| 8 | 10 | ANTI-LOCK BRAKE-CONTR |
| 20* | VAC PUMP (H.D. CHASSIS ONLY) MODULE, ELEC. BRAKE CONTROL, BR.4KE PRESSURE MODULE, MAIN RELAY | |
| 9 | — | BLAVK |
| 10 | — | BLAVK |
| 11 | 20 | CHIME/ClG LTH/RADIO/PWK ANT, POWER ANT. RELAY, FRONT CIGAR LIGHTER, LEFT HAND INFO. CENTER, GLOVE COMPARTMENT LIGHT, MULTIFUNCTION CHIME MODULE, RADIO |
| 12 | 20 | AUTO LEVEL CONTROL, ELEC. COMPRESSOR, ELEC. HEIGHT SENSOR, ELEC. RELAY |
| 13 | 20 | BRAKE & HAZARD LPS, BRAKE LIGHT SWITCH, HAZARD FLASHER |
| 14 | 20 | PARK LAMPS, INSTRUMENT CLUSTER, LIGHT SWITCH, TWILIGHT SENTINEL/DAYTIME RUNNING LIGHTS MODULE |
| 15 | 15 | CTSY LP/PWR MIRROR, DOME/MAP LIGHTS AND GARAGE DOOR OPENER, FRONT DOOR LOCK FIBER OPTIC LIGHTS, FRONTIREAR DOOR WARNING LIGHTS, FRONT/FLEET VANITY MIRROR LIGHTS, FRONT/REAR/QTR PANEL COURTESY/READING LIGHTS, TRUNK LIGHT, LT POWER SEAT SWITCH |
| 16 | 15 | GAUCES/DR LUCK/ILL ENT, AUTO. DAY/NIGHT MIRROR, AUTO. DOOR LOCK MODULE, BODY COMPUTER MODULE, COMPUTER CONTROLLED RIDE MODULE, DIAG. ENERGY RESERVE MODULE, FUEL TANK UNIT, ILLUMINATED ENTRY, INSTRUMENT CLUSTER, POWER SEATS, KEYLESS ENTRY, L & R GO SPECIAL SEAT CTRLS, MULTIFUNCTION CHIME MODULE, RIGHT SIDE INFO. CENTER, SEAT MEMORY MODULE, THEFT DETERRENT MODIJLE |
| 17 | 15 | ENGINE CTRL MOD, POWER CONTROL MODULE, PASS KEY DECODER MODULE |
| 18 | 10 | SUP INFL REST, DIAGNOSTIC/ENERGY RESERVE MODULE (DERM), DUAL SENSOR |
| 19 | 20 | TURN SIGN/BACK UP LPS, NEUTRAL SAFETY BACKUP, TURN FLASHER, TURN/HAZARD SWITCH |
| 20 | 20 | SPARE |
| 21 | 25 | SPARE |
| 22 | 20 | TRULVK RELWEL FILLER, TRUNK LID RELEASE SWITCH, FUEL DOOR RELEASE SWITCH |
| 23 | 30 CB | PWR WDO/SUN ROOF, ASTROROOF CONTROL MODULE, EXPRESS DOWN WINDOW MODULE, POWER WINDOW SWITCHES AND LOCKOUT RELAY |
| 24 | 30 CB | DR LKS/RR DEFOG, DOOR LOCK RELAY, LEFT & RIGHT SIDE RECLINER SWITCHES, LEFT & RIGHT SEAT SWITCHES, L & R 60 SPECIAL SEAT CTRL SW, REAR DEFOGGER, SEAT MEMORY MODULE, KEYLESS ENTRY |
| 25 | 10 | INST PANEL LAMPS, ASHTRAY LIGHT, BODY COMPUTER MODULE, ENGINE COMPARTMENT LIGHT, I/P AND SWITCH BACK LIGHTS, RADIO DISPLAY DIMMING INPUT |
Relay panel
| Fuse name | Ampere rating | Description |
| HORN/TRUNK PULL ON | 25 | HORN RELAY, PULL DOWN UNIT |
| DOOR LOCK | 15 | DOOR LOCK SWITCHES, OUTSIDE MIRROR CONTROL SWITCH, LT AND RT REAR CIGAR LIGHTS, KEYLESS ENTRY, TRUNK LID RELEASE, AUTOMATIC DOOR LOCKS, ILLUMINATED ENTRY, LT AND RT REAR, DOOR LOCK SWITCHES, LT AND RT REAR DOOR COURTESY LIGHTS |
| HEATED MIRROR | 10 | HEATED MIRROR |
| A/C PROGRAMMER | 10 | A/C PROGRAMMER |
| ERLS | 15 | A/C COMPRESSOR CONTROL RELAY, VISCOVS CONVERTER CLUTCH BRAKE SWITCH, EGR SOLENOID, VAPOR CANISTER PURGE SOLENOID, POWER STEERING PRESSURE SWITCH |
| FUEL PUMP | 20 | FUEL PUMP RELAY, ENGINE OIL PRESSURE SWITCH |
| INJECTOR | 10 | FUEL INJECTORS 2,3,5 AND a |
| INJECTOR | 10 | FUEL INJECTORS 1,4,6 AND 7 |
| Relay | Usage |
| A | ANTENNA RELAY |
| B | BOSE RELAY (IF EQUIPPED) |
| C | DEFOGGER RELAY |
| D | WINDOW LOCKOUT RELAY |
| E | RETAINED ACCESSORY POWER REMY NO. 2 |
| F | RETAINED ACCESSORY POWER RELAY NO. 1 |
| G | LECTRONIC LEVEL CONTROL (ELC) |
| H | FUEL PUMP RELAY |
| J | HORN RELAY |
Maxi Fuses
Right side
| Fuse name | Ampere rating | Description |
| SPARE | 30 | SPARE |
| 1GN SW | 60 | RETAINED ACCESSORY POWER, IGNITION SWITCH |
| BLWR | 30 | ELECTRONIC CLIMATE CONTROL, POWER MODULE BLOWER CONTROL MODULE |
| ECM | 20 | BODY CONTROL MODULE (BCM), ELECTRONIC CONTROL MODULE (ECM), PASS KEY DECODER MODULE |
| BOSE/SPARE | 20 | BOSE RADIO RELAY IF EQUIPPED |
| PWR LK SEATS RR DE | 50 | POWER TO CB 24 (SEE FUSE BLOCK) |
| HORN | 40 | POWER TO FUSES 1 AND 2 (SEE FUSE BLOCK) |
| HTD W/S SPARE | 20 | HEATED WINDSHIELD IF EQUIPPED |
Left side
| Fuse name | Ampere rating | Description |
| ABS PMP | 40 | ABS PUMP RELAY |
| ABS MA | 30 | MAIN RELAY |
| ELC | 40 | POWER TO FUSES 11 AND 12 (SEE FUSE BLOCK) |
| COOL FAN | 40 | COOLANT FAN RELAYS |
| MlSC LTS | 60 | POWERS FOR FUSES 13,14 AND 15 (SEE FUSE BLOCK) |
| HDLPS | 30 | HEADLIGHT SWITCH |
| IGN | 60 | THEFT DETERRENT, IGNITION SWITCH |
| SPARE | 60 | SPARE |
Conclusion
For owners and enthusiasts of classic Cadillac DeVille 1993, 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.
