The Cadillac Seville, manufactured from 1998 to 2004, was a luxury sedan renowned for its comfort, advanced features, and robust performance. Its electrical system, including the fuse box and relay components, played a crucial role in maintaining its operational efficiency.
The fuse box in the Cadillac Seville housed multiple fuses, each protecting specific electrical circuits throughout the vehicle. These circuits powered essential components such as the engine control module, lighting systems, climate control, infotainment features, and more. Fuses were designed to prevent damage by breaking the circuit in the event of an electrical overload or short circuit.
Relays in the Cadillac Seville functioned as electrically operated switches that controlled high-current circuits. They facilitated the precise activation and deactivation of functions like the starter motor, fuel pump, air conditioning compressor, and power windows or seats. By efficiently managing power distribution, relays ensured that each component received the necessary voltage for optimal performance.
Regular inspection and maintenance of the fuse box and relays were essential to ensure the Cadillac Seville operated smoothly. This involved checking fuses for signs of wear or damage, ensuring relay connections were secure, 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 in the Cadillac Seville 1998-2004.
MUST READ: DYI – How to Check Car Fuses?
(1998-2004) Cadillac Seville 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 Seville 1998-2004 fuse assignment
- Cigar lighter / power outlet fuses in the Cadillac Seville are the fuse №. 23 in the Engine compartment fuse box and fuses №. 58 and 65 in the Rear Underseat fuse box.
Year of production: 1998, 1999, 2000, 2001, 2002, 2003, 2004
Fuse Box in the engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the engine compartment
| № | Description |
|---|---|
| 1 | ALDL |
| 2 | Accessory |
| 3 | Windshield Wipers |
| 4 | Not Used |
| 5 | Headlamp Low Beam Left |
| 6 | Headlamp Low Beam Right |
| 7 | Instrument Panel |
| 8 | Powertrain Control Module Battery |
| 9 | Headlamp High Beam Right |
| 10 | Headlamp High Beam Left |
| 11 | Ignition 1 |
| 12 | 1998-1999: Not Used 2000-2004: Fog Lamps |
| 13 | 1998-1999: Not Used 2000-2004: Transmission |
| 14 | Cruise Control |
| 15 | 1998-1999: Oxygen Sensor A 2000-2004: Coil MDL |
| 16 | Injector Bank #2 |
| 17 | Not Used |
| 18 | 1998-1999: Powertrain Control Module Ignition 2000-2004: Not Used |
| 19 | 1998-1999: Direct Ignition System 2000-2001: Powertrain Control Module Ignition |
| 20 | 1998-1999: Oxygen Sensor B 2000-2004: Oxygen Sensor |
| 21 | Injector Bank #1 |
| 22 | Auxiliary Power (Cltr 2) |
| 23 | Cigar Lighter |
| 24 | 1998-1999: Fog Lamps/Daytime Running Lamps 2000-2004: Daytime Running Lamps |
| 25 | Horn |
| 26 | Air Conditioner Clutch |
| 43 | 1998-1999: Export Brake 2000: Antilock Brake System 2001-2004: Not Used |
| 44 | 1998-1999: Antilock Brake System Solenoid 2000: Air Pump 2001-2004: Antilock Brake System |
| 45 | 1998-1999: Antilock Brake System Motor 2000-2004: Air Pump |
| 46 | Cooling Fan Secondary |
| 47 | Cooling Fan Primary |
| 48-52 | Spare Fuses |
| 53 | Fuse Puller |
| Circuit breaker | |
| 41 | Starter |
| 42 | 1998-2000: Not Used 2001-2004: Export Use |
| Relays | |
| 27 | Headlamp High Beam |
| 28 | Headlamp Low Beam |
| 29 | Fog Lamps |
| 30 | Daytime Running Lamps |
| 31 | Horn |
| 32 | Air Conditioner Clutch |
| 33 | Not Used |
| 34 | Accessory |
| 35 | 1998-1999: Starter 2 2000-2004: Not Used |
| 36 | Starter 1 |
| 37 | Cooling Fan 1 |
| 38 | Ignition 1 |
| 39 | Cooling Fan Series/Parallel |
| 40 | Cooling Fan 2 |
Passenger compartment fuse box
Fuse Box Location
It is located under the rear seat.
Fuse box diagram
Assignment of the fuses and relays in the Rear Underseat fuse box
| № | Description |
|---|---|
| 1 | Fuel Pump |
| 2 | Heater, Ventilation, Air Conditioner Blower |
| 3 | Memory Seat, Tilt and Telescoping Steering |
| 4 | 1998-1999: Assembly Line Diagnostic Link 2000-2001: Not Used 2002-2004: SDAR (XM Satellite Radio) |
| 5 | Driver Door Module |
| 6 | Heated Seat Left Rear |
| 7 | Power Tilt and Telescoping Steering |
| 8 | Supplemental Inflation Restraint |
| 9 | Not Used |
| 10 | Lamps Park Right |
| 11 | Fuel Tank Ventilation Solenoid |
| 12 | Ignition 1 |
| 13 | Lamps, Parking Left |
| 14 | Interior Lamp Dimmer Module |
| 15 | Navigation |
| 16 | Heated Seat Left Front |
| 17 | Export Lighting |
| 18 | Rear Door Modules |
| 19 | Stoplamps |
| 20 | Neutral Safety Back-up |
| 21 | Audio |
| 22 | Retained Accessory Power for Sunroof |
| 23 | Not Used |
| 24 | Not Used |
| 25 | Passenger Door Module |
| 26 | Fuel Door/Trunk Release (Body) |
| 27 | Interior Lamps |
| 28 | Rear HVAC Blower |
| 29 | Ignition Switch |
| 30 | Not Used |
| 31 | Heated Seat Right Front |
| 32 | 1998-2002: Continuous Variable Road Sensing Suspension 2003-2004: Magnetic Ride Control |
| 33 | Heating, Ventilation, Air Conditioning |
| 34 | Ignition 3 Rear |
| 35 | Antilock Braking System |
| 36 | Turn Signal/Hazard |
| 37 | Heated Seat Right Rear |
| 38 | Dash Integration Module |
| 60 | Park Brake |
| 61 | Rear Defog |
| 62 | 1998-1999: Not Used 2000-2004: Export Brake |
| 63 | Audio Amplifier |
| 64 | ELC Compressor/Exhaust |
| 65 | Cigar Lighter |
| 66 | Not Used |
| 70-74 | Spare Fuses |
| 75 | Fuse Puller |
| Circuit breaker | |
| 56 | Power Seats |
| 57 | Power Windows |
| 58 | Cigarette Lighter |
| 59 | Rear Defog |
| Relays | |
| 39 | Fuel Pump |
| 40 | Parking Lamps |
| 41 | Ignition 1 |
| 42 | Park Brake A |
| 43 | Park Brake B |
| 44 | Park Shift Interlock |
| 45 | Reverse Lamps |
| 46 | Retained Accessory Power for Sunroof |
| 47 | Rear HVAC Blower |
| 48 | 1998-2002: Suspension Dampers 2003-2004: Not Used |
| 49 | Ignition 3 |
| 50 | Fuel Tank Door Release |
| 51 | Interior Lamps |
| 52 | Trunk Release |
| 53 | Front Courtesy Lamps |
| 54 | Rear Courtesy Lamps |
| 55 | Electronic Level Control Compressor |
Conclusion
For owners and enthusiasts of classic Cadillac Seville 1998-2004, 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.