The Cadillac DeVille, manufactured from 2000 to 2005, was a full-size luxury sedan known for its comfort, spaciousness, and advanced technology features. Its electrical system, which includes the fuse box and relay components, played a vital role in maintaining the vehicle’s functionality and reliability.
The fuse box in the Cadillac DeVille housed various fuses that protected 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 designed to interrupt the electrical flow if there was an overload or short circuit, preventing damage to sensitive components.
Relays in the Cadillac DeVille acted 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. Efficient 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 Cadillac DeVille 2000-2005.
MUST READ: DYI – How to Check Car Fuses?
(2000-2005) 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 2000-2005 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: 2000, 2001, 2002, 2003, 2004, 2005
Fuse Box in the engine compartment
Fuse Box Location
Fuse box diagram
Assignment of the fuses and relays in the engine compartment
| № | Description |
|---|---|
| 1 | Assembly Line Diagnostic Work |
| 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 | Fog Lamps |
| 13 | Transmission |
| 14 | Cruise Control |
| 15 | Coil Module |
| 16 | Injector Bank #2 |
| 17 | Not Used |
| 18 | Not Used |
| 19 | Powertrain Control Module Ignition |
| 20 | Oxygen Sensor |
| 21 | Injector Bank #1 |
| 22 | Cigar Lighter #2 |
| 23 | Cigar Lighter #1 |
| 24 | Daytime Running Lamps |
| 25 | Horn |
| 26 | Air Conditioner Clutch |
| 42 | Not Used |
| 43 | 2000-2001: Anti-Lock Brake System 2002-2005: Not Used |
| 44 | 2000-2001: Air Pump B 2002-2005: Anti-Lock Brake System |
| 45 | 2000-2001: Air Pump A 2002-2005: Air Pump |
| 46 | Cooling Fan 1 |
| 47 | Cooling Fan 2 |
| 48-52 | Spare fuses |
| 53 | Fuse Puller |
| 54 | 2005: Heated Steering Wheel (Option) |
| Relays | |
| 27 | Headlamp High Beam |
| 28 | Headlamp Low Beam |
| 29 | Fog Lamps |
| 30 | Daytime Running Lamps |
| 31 | Horn |
| 32 | Air Conditioner Clutch |
| 33 | 2000-2004: Not Used 2005: AIR Control Valve (Option) |
| 34 | 2000-2004: Accessory 2005: Heated Steering Wheel (Option) |
| 35 | 2000-2004: Not Used 2005: Accessory |
| 36 | Starter 1 |
| 37 | Cooling Fan 1 |
| 38 | Ignition 1 |
| 39 | Cooling Fan Series/Parallel |
| 40 | Cooling Fan 2 |
| Circuit Breakers | |
| 41 | Starter |
Passenger compartment fuse box
Fuse Box Location
It is located under the rear seatю
Fuse box diagram
Assignment of the fuses and relays in the Rear Underseat fuse box
| № | Description |
|---|---|
| 1 | Fuel Pump |
| 2 | Heater, Ventilation and Air Conditioning Battery |
| 3 | Memory Seat, Tilt and Telescoping Steering |
| 4 | 2000-2001: HVAC Blower 2002-2005: RR Lumbar, Antenna |
| 5 | Driver Door Module |
| 6 | Heated Seat Left Rear |
| 7 | Power Tilt and Telescoping Steering |
| 8 | Supplemental Inflation Restraint |
| 9 | 2000-2001: Not Used 2002-2005: SDAR (XM™ Satellite Radio) |
| 10 | Lamps Park Right |
| 11 | Fuel Tank Ventilation Solenoid |
| 12 | Ignition 1 |
| 13 | Interior Lamp Dimmer Module |
| 14 | Sunshade |
| 15 | Navigation |
| 16 | Heated Seat Left Front |
| 17 | Interior Lamps |
| 18 | Right Rear Door Module |
| 19 | Stoplamps |
| 20 | Park/Reverse |
| 21 | Audio |
| 22 | Retained Accessory Power for Sunroof |
| 23 | Lamps, Parking Left |
| 24 | Night Vision |
| 25 | Passenger Door Module |
| 26 | Body |
| 27 | 2000-2001: Export Lights 2002-2005: Export Lights, Power Locks |
| 28 | Rear HVAC Blower |
| 29 | Ignition Switch |
| 30 | 2000-2004: Hazard Signal 2005: Turn Signal, Hazard Signal |
| 31 | Reverse, Locks |
| 32 | Continuous Variable Road Sensing Suspension |
| 33 | Heating, Ventilation, Air Conditioning |
| 34 | Ignition 3 Rear |
| 35 | Antilock Braking System |
| 36 | Heated Seat, Right Front |
| 37 | Heated Seat, Right Rear |
| 38 | Dimmer |
| 60 | Park Brake |
| 61 | Rear Defog |
| 62 | 2000-2001: Right Rear Lumbar, Power 2002-2005: HVAC Blower |
| 63 | Audio Amplifier |
| 64 | ELC Compressor/Exhaust |
| 65 | Cigar Lighter |
| 66 | Not Used |
| 67 | Not Used |
| 68 | Not Used |
| 69 | Not Used |
| 70-74 | Spare Fuses |
| 75 | Fuse Puller |
| Relays | |
| 39 | Fuel Pump |
| 40 | Parking Lamps |
| 41 | Ignition 1 |
| 42 | 2000-2004: Park Brake A 2005: Not Used |
| 43 | 2000-2004: Park Brake B 2005: Not Used |
| 44 | Park Shift Interlock |
| 45 | Reverse Lamps |
| 46 | Retained Accessory Power for Sunroof |
| 47 | Reverse Lockout |
| 48 | Suspension Dampers |
| 49 | Ignition 3 |
| 50 | Fuel Tank Door Release |
| 51 | Interior Lamps |
| 52 | Trunk Release |
| 53 | Not Used |
| 54 | Lock, Cylinder |
| 55 | Automatic Level Control Compressor |
| 58 | 2000-2004: Cigar Lighter 2005: Not Used |
| 59 | Rear Defog |
| Circuit Breakers | |
| 56 | Power Seats |
| 57 | Power Windows |
Conclusion
For owners and enthusiasts of classic Cadillac DeVille 2000-2005, 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.
