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Audi A8 / S8 Fuse Diagram (D2/4D; 1998-2002)

17/01/2024
AUDI

In this article, we consider the first-generation Audi A8 / S8 (D2/4D), produced from 1994 to 2002. Here you will find fuse box diagrams of Audi A8 and S8 1998, 1999, 2000, 2001, and 2002, get information about the location of the fuse panels inside the car, and learn about the assignment of each fuse (fuse layout) and relay.

Fuse Layout Audi A8 and S8 1998-2002

 

 

  1.  

     

    Location of fuse and relay boxes

     

    1. Electronics box in plenum chamber
    2. Airbag control unit
    3. Diagnostic connector in centre console, under ashtray
    4. Relay and fuse carrier, luggage compartment, right
    5. Battery / additional battery
    6. Anti-theft alarm system horn
    7. Bracket for control units
    8. Mirror memory control unit, B pillar, driver’s side
    9. Steering column/belt height adjustment control unit, under carpet, driver’s seat (rear section)
    10. Heated lock cylinder control unit
    11. Relay under shelf on driver’s side (auxiliary relay carrier at wheelhouse, left)
    12. ABS control unit and radiator fan 3rd speed relay, under shelf on driver’s side
    13. Electronics box, front passenger’s footwell
    14. Fuse box, right A-pillar, behind trim in front passenger’s footwell
     
     
    Passenger Compartment Fuse Box

    Fuse Box Location

    The fuse box is located in the front passenger’s footwell.

     

     

    Fuse Box Diagram

     

     

    Assignment of the fuses in the passenger’s footwell

    No Amps Description
    ST1   Fuse carrier 1, black
    ST2   Fuse carrier 2, red
    ST3   Fuse carrier 3, yellow
    ST4   Fuse carrier 4, blue
    ST5   Fuse carrier 5, brown
    6   Secondary air pump fuse
    7   Spare fuses
    8   Radiator fan fuse
    ST1-1 5A Left side light/parking light, left tail light
    ST1-2 5A Right side light/parking light, right tail light
    ST1-3 15A Dipped beam headlight, right
    ST1-4 15A Dipped beam headlight, left, headlight range control
    ST1-5 10A Main beam headlight, left
    ST1-6 10A Main beam headlight, right, main beam warning lamp
    ST1-7 15A Hazard warning lights
    ST1-8 15A Dual tone horn
    ST1-9 10A Diagnostic socket (30a)
    ST1-10 25A Windscreen wiper system, automatic intermittent wash/ wipe relay
    ST2-1 10A Mirror heating
    ST2-2 10A Heated steering wheel
    ST2-3 5A Display and switch illumination, storage compartment, cup holder, number plate light
    ST2-4 5A Radiator fan relay, air quality sensor
    ST2-5 15A Front fog lights, rear fog light, fog lights/rear fog light control unit
    ST2-6 30A Heated rear window, air conditioner
    ST2-7 5A Steering angle sensor for ESP
    ST2-8 10A Hazard warning lights, terminal 75
    ST2-9 10A Brake lights
    ST2-10 5A Heated washer jets
    ST3-1 15A Bulb monitoring, on-board computer, dash panel insert, parking aid, diagnostic socket (15a), tyre pressure monitor, multi-function steering wheel, headlight range control
    ST3-2 5A Telephone, telematics, navigation system with screen
    ST3-3 15A Cigarette lighter, front
    ST3-4 10A Air conditioner, parking aid, auxiliary heating radio wave receiver, multi-function steering wheel, dash panel insert, solar cell isolation relay, tyre pressure monitor
    ST3-5 10A Air conditioner
    ST3-6 10A Cruise control system, reversing lights
    ST3-7 15A Air conditioner, coolant pump
    ST3-8 10A Air conditioner compressor, magnetic coupling
    ST3-9 5A Multi-function steering wheel
    ST3-10 20A Additional heater control unit, auxiliary heater
    ST4-1 20A Fuel pump
    ST4-2 30A V8, V12: Ignition coils
    V6: Output stage
    ST4-3 20A/10A Lambda probe heating
    V8 TDI: Fuel pump
    ST4-4 10A/15A V8 TDI: Fuel cooling pump
    V6: Brake servo relay
    ST4-5 5A Navigation system NS Low
    ST4-6 10A Navigation system NS Low, chip card reader unit
    ST4-7 - -
    ST4-8 5A Oil level thermo sender
    ST4-9 25A Control unit for ABS (ESP), terminal 30
    ST4-10 10A Control unit for ABS, terminal 15
    ST5-1 10A Illuminated vanity mirrors, central locking, indicator lights for anti-theft alarm system operation, interior lights, reading lamps
    ST5-2 10A Mirror adjustment, mirror retraction, control units for electric windows , toll pass, rear head restraint adjustment, potentiometer for seat heating, seat adjustment memory
    ST5-3 10A Entry and footwell lights, ultra-sonic sensor control unit, internal central locking switch, mirror and seat adjustment with memory function, luggage compartment release
    ST5-4 10A Central locking, automatic anti-dazzle interior mirror, rear roller blind, reading lamp relay
    ST5-5 15A Central locking
    ST5-6 20A Sliding/tilting sunroof
    ST5-7 15A Rear cigarette lighter, heated lock cylinders, adjustable front passenger’s seat
    ST5-8   Not used
    ST5-9 20A Steering column and belt height adjustment
    ST5-10 20A Heated front seats, rear roller blind

     

     
     
     
    Luggage Compartment Fuse Box
     
     

    It is on the right side.

     

    No Description
    1 Terminal 30 junction box
    2 ABS hydraulic pump fuse
    3 Heated seats single fuse
    4 Terminal 30 fuse-trailer operation
    6 Radio fuse
    Navigation fuse
    7 ABS valves fuse
    9 Telephone fuse
    14 Seat adjustment fuse
    Models without rear seat adjustment: Rear head restraint adjustment fuse

     

     

     
    Engine Compartment Electronics Box

     

     

    It is on the passenger’s side under a cover.

     
    V6, V8 and V12 petrol engines

    No Description
    1 V12: Engine control unit fuse
    2a V12: Secondary air pump relay 1
    2b V12: Secondary air pump relay 1
    V6, V8: Automatic gearbox control unit fuse
    3 V12: Injector fuse
    4 V6, V8: Secondary air pump relay
    V12: Control element fuse
    V12: Coolant pump fuse
    5 V12: Automatic gearbox control unit fuse
    6 V6, V8: Injector fuse
    V12: Continued coolant circulation relay
    7 V6, V8: Control element fuse
    V12: Continued coolant circulation relay
    8 V12: Control element fuse 2
    9 V8: Engine control unit fuse
    V12: Secondary air pump relay 2
    10 V12: Secondary air pump relay 2
     
    V6 diesel engines (TDI)

    Description
    1 Fuse 1 for glow plugs-engine
    2a Alternator cut-in relay
    2b Alternator cut-in relay
    4 Automatic gearbox control unit fuse
    5 Fuse 2 for glow plugs-engine
    6 Diesel direct injection system relay
    7 Diesel direct injection system relay
    9 Air mass meter fuse
    10 Engine control unit fuse

     

     
    V8 diesel engines (TDI)

     

    No Description
    1 Regulating valve fuse
    2 Glow plug relay 2
    3 Charge air cooling pump relay
    4 Automatic gearbox control unit fuse
    5 Coolant pump fuse
    6 Alternator cut-in relay
    7 Engine control unit fuse
    8 Relay for glow plugs
    9 Fuse 2 for glow plugs-engine
    10 Fuse 1 for glow plugs-engine

     

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