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

The location of the fuses in the engine compartment: Cadillac Seville (1998-2004)
The location of the fuses in the engine compartment: Cadillac Seville (1998-2004)

Fuse box diagram

Under-hood fuse box diagram: Cadillac Seville
Under-hood fuse box diagram: Cadillac Seville

Assignment of the fuses and relays in the engine compartment

Description
1ALDL
2Accessory
3Windshield Wipers
4Not Used
5Headlamp Low Beam Left
6Headlamp Low Beam Right
7Instrument Panel
8Powertrain Control Module Battery
9Headlamp High Beam Right
10Headlamp High Beam Left
11Ignition 1
121998-1999: Not Used
2000-2004: Fog Lamps
131998-1999: Not Used
2000-2004: Transmission
14Cruise Control
151998-1999: Oxygen Sensor A
2000-2004: Coil MDL
16Injector Bank #2
17Not Used
181998-1999: Powertrain Control Module Ignition
2000-2004: Not Used
191998-1999: Direct Ignition System
2000-2001: Powertrain Control Module Ignition
201998-1999: Oxygen Sensor B
2000-2004: Oxygen Sensor
21Injector Bank #1
22Auxiliary Power (Cltr 2)
23Cigar Lighter
241998-1999: Fog Lamps/Daytime Running Lamps
2000-2004: Daytime Running Lamps
25Horn
26Air Conditioner Clutch
431998-1999: Export Brake
2000: Antilock Brake System
2001-2004: Not Used
441998-1999: Antilock Brake System Solenoid
2000: Air Pump
2001-2004: Antilock Brake System
451998-1999: Antilock Brake System Motor
2000-2004: Air Pump
46Cooling Fan Secondary
47Cooling Fan Primary
48-52Spare Fuses
53Fuse Puller
Circuit breaker
41Starter
421998-2000: Not Used
2001-2004: Export Use
Relays
27Headlamp High Beam
28Headlamp Low Beam
29Fog Lamps
30Daytime Running Lamps
31Horn
32Air Conditioner Clutch
33Not Used
34Accessory
351998-1999: Starter 2
2000-2004: Not Used
36Starter 1
37Cooling Fan 1
38Ignition 1
39Cooling Fan Series/Parallel
40Cooling Fan 2

Passenger compartment fuse box

Fuse Box Location

The location of the fuses in the passenger compartment: Cadillac Seville (1998-2004)
The location of the fuses in the passenger compartment: Cadillac Seville (1998-2004)

It is located under the rear seat.

Fuse box diagram

Interior fuse box diagram: Cadillac Seville
Interior fuse box diagram: Cadillac Seville

Assignment of the fuses and relays in the Rear Underseat fuse box

Description
1Fuel Pump
2Heater, Ventilation, Air Conditioner Blower
3Memory Seat, Tilt and Telescoping Steering
41998-1999: Assembly Line Diagnostic Link
2000-2001: Not Used
2002-2004: SDAR (XM Satellite Radio)
5Driver Door Module
6Heated Seat Left Rear
7Power Tilt and Telescoping Steering
8Supplemental Inflation Restraint
9Not Used
10Lamps Park Right
11Fuel Tank Ventilation Solenoid
12Ignition 1
13Lamps, Parking Left
14Interior Lamp Dimmer Module
15Navigation
16Heated Seat Left Front
17Export Lighting
18Rear Door Modules
19Stoplamps
20Neutral Safety Back-up
21Audio
22Retained Accessory Power for Sunroof
23Not Used
24Not Used
25Passenger Door Module
26Fuel Door/Trunk Release (Body)
27Interior Lamps
28Rear HVAC Blower
29Ignition Switch
30Not Used
31Heated Seat Right Front
321998-2002: Continuous Variable Road Sensing Suspension
2003-2004: Magnetic Ride Control
33Heating, Ventilation, Air Conditioning
34Ignition 3 Rear
35Antilock Braking System
36Turn Signal/Hazard
37Heated Seat Right Rear
38Dash Integration Module
60Park Brake
61Rear Defog
621998-1999: Not Used
2000-2004: Export Brake
63Audio Amplifier
64ELC Compressor/Exhaust
65Cigar Lighter
66Not Used
70-74Spare Fuses
75Fuse Puller
Circuit breaker
56Power Seats
57Power Windows
58Cigarette Lighter
59Rear Defog
Relays
39Fuel Pump
40Parking Lamps
41Ignition 1
42Park Brake A
43Park Brake B
44Park Shift Interlock
45Reverse Lamps
46Retained Accessory Power for Sunroof
47Rear HVAC Blower
481998-2002: Suspension Dampers
2003-2004: Not Used
49Ignition 3
50Fuel Tank Door Release
51Interior Lamps
52Trunk Release
53Front Courtesy Lamps
54Rear Courtesy Lamps
55Electronic 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.

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