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Fuse box diagram (fuse layout), location and assignment of fuses and relays of Audi V8 (4C) (1988, 1989, 1990, 1991, 1992, 1993, 1994).
Checking and Replacing Fuses
The wiring circuits in the vehicle are protected from short circuits by fuses. This greatly reduces the chance of damage caused by electrical problems.
To check a fuse, look at the silver-colored band inside the fuse. If the band is broken or melted, replace the fuse. Be sure to replace a bad fuse with a new one of the identical size and rating.
Fuses of the same amperage can be temporarily borrowed from another fuse location if a fuse goes out. Replace the fuse as soon as possible.
Note
- Before replacing a fuse check that the key has been removed from the ignition and that all the services are switched off and/or disengaged.
- When replacing a blown fuse, it is important to use only a fuse having the correct amperage rating. The use of a fuse with a rating other than indicated may result in a dangerous electrical system overload.
- If a properly rated fuse continues to blow, it indicates a problem in the circuit that must be corrected.
Passenger Compartment Fuse Box Diagram
| № | A | Protected Component |
|---|---|---|
| 1 | 15 | Front Fog Light, Rear Fog Light |
| 2 | 15 | 1988-1990: Emergency Flasher |
| 10 | 1991-1994: Emergency Flasher | |
| 3 | 25 | 1988-1990: Stop Lamp Switch, Horn |
| 20 | 1991-1994: Stop Lamp Switch, Horn, Auxiliary Radiator Fan (2nd/3rd Speed) (1993-1994) | |
| 4 | 15 | Interior Lights, Cigarette Lighter, Luggage Compartment Light, Trip Computer, Climate Control System, Radio/Speakers, Auxiliary Radiator Fan (1st Speed), Vanity Mirror Light, Clock, Socket |
| 5 | 10 | Oxygen Sensor Heating Element |
| 30 | Cooling Fan (Full Speed) | |
| 6 | 5 | Right Side Marker & Park Lights, Daytime Headlights (Canada), Right Taillights (1993-1994) |
| 7 | 5 | Left Side Marker & Park Lights, Left Taillights (1993-1994) |
| 8 | 10 | Right High Beam Headlight, High Beam indicator |
| 9 | 10 | Left High Beam Headlight |
| 10 | 10 | Right Low Beam Headlight |
| 11 | 10 | Left Low Beam Headlight |
| 12 | 15 | Headlight Washer, Auxiliary Washer, Rear Light Control Unit, Back-Up Lights, ABS Control Unit, Auto Shift Lock, Car Phone (1993-1994), Differential Lock, Cruise Control |
| 13 | 15 | Fuel Pump |
| 14 | 5 | License Plate Light, Center Console Light, Glove Box Light, Engine Compartment Light, Instrument Cluster (1993-1994) |
| 15 | 25 | 1988-1990: Wiper/Washers, Turn Signals, Heated Washer Jets, Air Conditioner |
| 15 | 1991-1994: Wiper/Washers, Turn Signals, Heated Washer Jets | |
| 16 | 30 | 1988-1990: Rear Window Defogger, Heated Mirror |
| 20 | 1991-1994: Rear Window Defogger, Heated Mirror | |
| 17 | 30 | 1988-1990: Air Conditioner, Heater Blower |
| 20 | 1991-1994: Air Conditioner, Heater Blower | |
| 18 | 25 | 1988-1990: Power Seats witch Memory |
| 5 | 1991-1994: Power Seats Memory, Outside Mirror, Central Locking System (1993-1994) | |
| 19 | 10 | Central Locking System, Heated Door Lock, Anti-Theft Alarm System |
| 30 | Central Locking System, Heated Door Lock | |
| 15 | 1991-1994: Central Locking System, Heated Door Lock | |
| 20 | 25 | 1988-1990: Heated Seats |
| 30 | 1988-1990: Cooling Fan (Low Speed), Cooling Fan Relay | |
| 30 | 1991-1994: Heated Seats | |
| 21 | 20 | 1988-1990: Power Windows |
| 25 | 1991-1994: Power Windows, Rear Cigarette Lighter | |
| 22 | - | - |
| 23 | 10 | Injected Valves, Heated-Wire Air Flow Sensor |
| 24 | 15 | Active Carbon Canister Valve, Idle Stabilization |
| 25 | 30 | Power Seats witch Memory |
| 26 | 5 | Cruise Control |
| 27 | 5 | Motronic Engine Control System |
| 28 | 5 | 1988-1990: Instrument Cluster |
| 15 | 1991-1994: Instrument Cluster | |
| 29 | 10 | Automatic Transmission |
| 30 | 5 | Instrument Cluster, Trip Computer & Function Control Switch, Auto-Check System |
| 31 | - | - |
| R1 | Horn | |
| R2 | Foglights | |
| R3 | Automatic Transmission | |
| R4 | - | |
| R5 | Washer/Wiper Intermittent | |
| R6 | - | |
| R7 | Fuel Pump | |
| R8 | - | |
| R9 | Load Reduction | |
| R10 | - | |
| R11 | - | |
| R13 | Radiator Cooling Fan (3rd Stage) | |
| R12 | Power Window, Power Seats | |
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Passenger Compartment Relay Boxes
Relay Box №1
| № | Relay |
|---|---|
| R1 | Air Conditioner |
| R2 | Catalytic Converter |
| R3 | Radiator Coolant Fan (Low Speed) |
| R4 | Front Light |
| R5 | Power Window/Sun Roof |
| R6 | - |
| R7 | - |
| R8 | Radiator Cooling Fan |
| R9 | ABS Combination |
Relay Box №2
| № | Relay |
|---|---|
| R1 | - |
| R2 | Speaker |
| R3 | Anti-Theft Alarm Light Warning |
| R4 | Driver Heated Seat |
| R5 | Passenger Heated Seat |
| R6 | Shift Lock |
| R7 | Back-Up Light |
| R8 | Auxiliary Wash Pump |
| R9 | Left Rear Heated Seat |
| R10 | Right Rear Heated Seat |
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