The Volvo XC90 (2003 to 2015) have four different fuse box locations:
1. Relays/fuse box in the engine compartment;
2. Fuse box inside the passenger compartment, behind the plastic cover under the steering wheel;
3. Fuse box inside the passenger compartment, on the driver side edge of the dashboard;
4. Fuse box on the left side of the cargo compartment, behind the side panel.

Fuse box in the engine compartment fuses list Amperage:

Slot 1: Not used
Slot 2: Auxiliary lights (accessory) -> 20A Fuse
Slot 3: Not used
Slot 4: Oxygen sensors -> 20A Fuse
Slot 5: Crankcase ventilation heater, solenoid valves, fuel tank leakage monitor -> 10A Fuse
Slot 6: Mass air flow sensor, engine control module, injectors -> 15A Fuse
Slot 7: Not used
Slot 8: A/C compressor, accelerator pedal position sensor, ENot usedbox fan -> 10A Fuse
Slot 9: Not used
Slot 10: Not used
Slot 11: Ignition coils -> 20A Fuse
Slot 12: Not used
Slot 13: Windshield wipers -> 25A Fuse
Slot 14: ABS -> 30A Fuse
Slot 15: Headlight washers -> 35A Fuse
Slot 16: Not used
Slot 17: Driver’s side low beam -> 20A Fuse
Slot 18: Front parking lights -> 15A Fuse
Slot 19: ABS -> 30A Fuse
Slot 20: Passenger’s side low beam -> 20A Fuse
Slot 21: Fuel pump -> 15A Fuse
Slot 22: Starter motor -> 35A Fuse
Slot 23: Engine control module, engine relay -> 10A Fuse
Slot 24: Not used

Fuse box on the driver side edge of the dashboard fuses list Amperage:

Slot 1: Blower – climate system -> 30A Fuse
Slot 2: Audio amplifier -> 30A Fuse
Slot 3: Power driver’s seat (option) -> 25A Fuse
Slot 4: Power passenger’s seat (option) -> 25A Fuse
Slot 5: Driver’s door – central locking, power windows, door mirror -> 25A Fuse
Slot 6: Front passenger’s door – central locking, power windows, door mirror -> 25A Fuse
Slot 7: Not used
Slot 8: Not used
Slot 9: Audio, navigation system (option) -> 10A Fuse
Slot 10: On-board diagnostics, headlight switch, steering wheel angle sensor, steering wheel module -> 5A Fuse
Slot 11: Ignition switch, SRS, engine control module, immobilizer Slot 7:-> 5A Fuse
Slot 12: Ceiling lighting, upper electronic control module -> 10A Fuse
Slot 13: Moonroof (option) -> 15A Fuse
Slot 14 to 38: Not used

Fuse box behind the plastic cover under the steering wheel fuses list Amperage:

Slot 1: Heated passenger’s seat -> 15A Fuse
Slot 2: Heated driver’s seat -> 15A Fuse
Slot 3: Horn -> 15A Fuse
Slot 4: Not used
Slot 5: Audio system -> 10A Fuse
Slot 6: Not used
Slot 7: Not used
Slot 8: Alarm siren -> 5A Fuse
Slot 9: Brake light switch feed -> 5A Fuse
Slot 10: Instrument panel, climate system, power driver’s seat, Occupant Weight Sensor (USA) -> 10A Fuse
Slot 11: 12-volt sockets – front and rear seats -> 15A Fuse
Slot 12: Not used
Slot 13: Not used
Slot 14: Not used
Slot 15: ABS, STC/DSTC -> 5A Fuse
Slot 16: Power steering, Bi-Xenon headlights (option) -> 10A Fuse
Slot 17: Driver’s side front fog light (option) Slot 7:-> 5A Fuse
Slot 18: Passenger’s side front fog light (option) Slot 7:-> 5A Fuse
Slot 19: Not used
Slot 20: Not used
Slot 21: Transmission control module -> 10A Fuse
Slot 22: Driver’s side high beam -> 10A Fuse
Slot 23: Passenger’s side high beam -> 10A Fuse
Slot 24: Not used
Slot 25: Not used
Slot 26: Not used
Slot 27: Not used
Slot 28: Power passenger’s seat (option) -> 5A Fuse
Slot 29: Not used
Slot 30: Not used
Slot 31: Not used
Slot 32: Not used
Slot 33: Vacuum pump -> 20A Fuse
Slot 34: Pump – windshield and tailgate washers -> 15A Fuse
Slot 35: Not used
Slot 36: Not used

Fuse box behind the left side panel of the cargo compartment fuse list Amperage:

Slot 1: Backup lights -> 10A Fuse
Slot 2: Parking lights, foglights, cargo compartment lighting, license plate lights, brake light diodes -> 20A Fuse
Slot 3: Accessories -> 15A Fuse
Slot 4: Not used
Slot 5: Rear electronic module -> 10A Fuse
Slot 6: Navigation system (option), radio receiver, rear seat entertainment (accessory) Slot 7:-> 5A Fuse
Slot 7: Trailer wiring (30-feed) -> 15A Fuse
Slot 8: 12-volt socket in cargo compartment -> 15A Fuse
Slot 9: Rear passenger’s side door: power window, power window cutout function -> 20A Fuse
Slot 10: Rear driver’s side door: power window, power window cutout function -> 20A Fuse
Slot 11: Not used
Slot 12: Not used
Slot 13: Not used
Slot 14: Subwoofer (option), rear air conditioning system (option) -> 15A Fuse
Slot 15: Not used
Slot 16: Not used
Slot 17: Accessory audio -> 5A Fuse
Slot 18: Not used
Slot 19: Rear window wiper -> 15A Fuse
Slot 20: Trailer wiring (15-feed) -> 20A Fuse
Slot 21: Not used
Slot 22: Not used
Slot 23: All Wheel Drive Slot 7:-> 5A Fuse
Slot 24: Not used
Slot 25: Not used
Slot 26: Park assist -> 5A Fuse
Slot 27: Main fuse: trailer wiring, park assist, All Wheel Drive -> 30A Fuse
Slot 28: Central locking system -> 15A Fuse
Slot 29: Driver’s side trailer lighting: parking light, turn signal -> 25A Fuse
Slot 30: Passenger’s side trailer lighting: brake light, fog light, turn signal -> 25A Fuse
Slot 31: Main fuse: fuses 37, 38 -> 40A Fuse
Slot 32: Not used
Slot 33: Not used
Slot 34: Not used
Slot 35: Not used
Slot 36: Not used
Slot 37: Heated rear window -> 20A Fuse
Slot 38: Heated rear window -> 20A Fuse