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Audi 90 (B3) (1986 - 1991) Fuse Box Diagram

avatar Jonathan Yarden Jan 31, 2021 · 5 min. read

In this article you will find a description of fuses and relays Audi, with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most popular thing people look for).
Get tips on blown fuses, replacing a fuse, and more.

Year of production: 1986, 1987, 1988, 1989, 1990, 1991

Fuse Box

Audi 90 (B3) - fuse box diagram

1 Fog lights, rear fog light 15
2 Emergency flashers 15
3 Horn, brake lights 25
4 Reading lights, luggage compartment, cigar lighter, interior lights, make-up mirror, Board Computer, radio, clock, auto climate control, alarm system 15
5 Radiator cooling fan 30
6 Side marker, park lights, right 5
7 Side marker, park lights, left 5
8 Hi-beam headlight, right, hi-beam indicator light 10
9 Hi-beam headlight, left 10
10 Low beam headlight, right 10
11 Low beam headlight, left 10
12 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 15
13 Fuel pump, warm-up regulator 15
14 Glove compartment, engine compartment, license plate lights 5
15 Windshield wipers, thermoswitch, radiator cooling fan, turn signals, A/C pressure switch 25
16 Rear window heat element, outside mirror heat element 30
17 Fresh air blower, A/C 30
18 Power mirrors, rear window wiper (Coupe) 5
19 Central locking system, heated lock system 10
20 Radiator cooling fan (step 1), radiator cool fan after-run 30
21 Diagnostic 10
21 Rear cigar lighter 25
22 Not used
23 Power seats with memory, power seat control unit 30
24 Engine control I 10
25 Heated seats 30
26 Daytime driving lights (Canada) 5
27 Engine control I (from September, 1987) 10
28 Engine control II 15
29 Spare fuses 15
I Fog lights, J5
II up to 1990: Radiator cooling tan (stage 2), J101
from 1990: Not used
III Radiator cooling fan after-run control unit, J138
IV up to 1990: Not used
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

Auxiliary relay panel

Audi 90 (B3) - fuse box diagram - auxiliary relay panel

No. 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 Not used
6 Dynamic oil pressure warning (without Auto-Check), J114
Lamp control unit, front (with Auto-Check), J123
7 Not used
8 Not used
9 Not used
10 Not used
11 Not used
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 Not used

WARNING: Terminal and harness assignments for individual connectors will vary depending on vehicle equipment level, model, and market.

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