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Fuse box diagrams (layout, location, function, assignment) in the cabin and engine compartment of Audi 80 and 90 (B3) (1986, 1987, 1988, 1989, 1990, 1991).
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.
Engine Compartment Fuse Box Diagram
| № | A | Description |
|---|---|---|
| 1 | 15 | Fog lights, rear fog light |
| 2 | 15 | Emergency flashers |
| 3 | 25 | Horn, brake lights |
| 4 | 15 | Reading lights, luggage compartment, cigar lighter, interior lights, make-up mirror, Board Computer, radio, clock, auto climate control, alarm system |
| 5 | 30 | Radiator cooling fan |
| 6 | 5 | Side marker, park lights, right |
| 7 | 5 | Side marker, park lights, left |
| 8 | 10 | Hi-beam headlight, right, hi-beam indicator light |
| 9 | 10 | Hi-beam headlight, left |
| 10 | 10 | Low beam headlight, right |
| 11 | 10 | Low beam headlight, left |
| 12 | 15 | Instrument cluster, back-up lights, Auto-Check, cruise control, ABS, Board Computer, differential locks, electronic thermoswitch, throttle valve time control unit, radiator cooling fan after-run control unit |
| 13 | 15 | Fuel pump, warm-up regulator |
| 14 | 5 | Glove compartment, engine compartment, license plate lights |
| 15 | 25 | Windshield wipers, thermoswitch, radiator cooling fan, turn signals, A/C pressure switch |
| 16 | 30 | Rear window heat element, outside mirror heat element |
| 17 | 30 | Fresh air blower, A/C |
| 18 | 5 | Power mirrors, rear window wiper (Coupe) |
| 19 | 10 | Central locking system, heated lock system |
| 20 | 30 | Radiator cooling fan (step 1), radiator cool fan after-run |
| 21 | 10 | Diagnostic |
| 21 | 25 | Rear cigar lighter |
| 22 | - | - |
| 23 | 30 | Power seats with memory, power seat control unit |
| 24 | 10 | Engine control I |
| 25 | 30 | Heated seats |
| 26 | 5 | Daytime driving lights (Canada) |
| 27 | 10 | Engine control I (from September, 1987) |
| 28 | 15 | Engine control II |
| 29 | 15 | Spare fuses |
| I | Fog lights, J5 | |
| II | up to 1990: Radiator cooling tan (stage 2), J101 | |
| from 1990: - | ||
| III | Radiator cooling fan after-run control unit, J138 | |
| IV | up to 1990: - | |
| from 1990: Headlight washer system, J39 | ||
| V | Load reduction relay, J18 | |
| VI | up to 1990: A/C fresh air blower, J11 | |
| from 1990: Radiator cooling fan high speed relay, J101 | ||
| VII | Horn, J4 | |
| VIII | Bridge between contact 36 and 38 for manual transmissions | |
| Auto transmission, J60 | ||
| IX | Intermittent washer/wiper, J31 | |
| X | Fuel pump, J17 | |
| XI | Radiator cooling fan (stage 1), J26 | |
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Auxiliary relay panel in the instrument panel
To access the unit, unscrew the 4 screws and remove the protective cover.
| № | Description |
|---|---|
| 1 | ABS system, J156 |
| 2 | Seat belt, radio, parking light warning, J152 |
| 3 | Interior light control unit, J140 |
| 4 | A/C clutch control unit, J153 |
| 5 | - |
| 6 | Dynamic oil pressure warning (without Auto-Check), J114 Lamp control unit, front (with Auto-Check), J123 |
| 7 | - |
| 8 | - |
| 9 | - |
| 10 | - |
| 11 | - |
| 12 | Circuit breaker (power seats with memory, power windows, power sunroof), S43 |
| 13 | Seat heater control unit, passenger. J132 |
| 14 | Seat heater control unit, driver, J131 |
| 15 | Sunroof relay, J139 Sunroof and power window control unit, J139 |
| 16 | Sunroof and power window control unit, J139 |
| 17 | Wire distributor adaptor, (optional equipment connector) |
| 18 | - |
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