Diagram of fuse and relay boxes – Audi 100 and A6 C4

Applies to vehicles new in years:

Audi  100: 1991, 1992, 1993, 1994

Audi  A6 C4: 1995, 1996, 1997.

 

Locations

1. Additional relay and fuse board No. 1;
2. Fuse and relay box ( Audi 100), fuse box ( Audi  A6);
3. Junction box no. 1;
4. Central switchgear with a relay box;
5. Additional mounting box No. 2;
6. Junction box no. 2;
7. Ignition system box;
8. Additional mounting box No. 3;
9. Junction box no.3.

Changes to the schemes are possible depending on the equipment and year of manufacture of your car. Be careful.

Additional box – no.1

Located in the engine compartment. To gain access, remove the protective cover by sliding the latches forward.

For cars manufactured before 1994

Description

Number	Description
1	Not used
2	Seat belt control relay, parking light
3	Time delay relay for interior lighting
4	Not used
5	Headlight relay
6	Not used
7	Relay for switching on the 3rd fan speed
8	ABS relay
9	Not used
10	Electric window relay
11	Electric window relay
12	Rear window washer and wiper relay
13	Not used
14	Electric window overload relay
15	Driver seat heating relay
16	Passenger seat heating relay
17	Not used

For cars manufactured from 1994

Description

Number	Description
1	Cooling fan control relay when engine is not running
2	Engine cooling fan relay
3	Relay for switching on the 3rd fan speed
4	Fog lamp relay
5	Not used
6	Relay for intensive glass washing system
7	Daytime running lamps relay
8	Gear selection lamp relay
9	A / C clutch relay
10	Relay for switching on the air conditioner module
11	Rear window wiper and washer relay
12	Not used
13	Speaker power relay
14	Lamp health control unit
15	Lamp health control unit
16	Servotronic steering controller
17	Air conditioner relay
Circuit breakers
A1	Automatic closing of windows
A2	central lock
A3	Window lifters
A4	Radio
A5	seat heating
B1	seat adjustment memory
B2	Electric seat
B3	Heated inserts for door locks
B4	Not used
B5	Sunroof

Main box – no.2

For cars manufactured before 1994

Description

Number	Amperes [A]	Description
1	15	Rear fog light bulbs
2	15	Hazard warning system
3	25	Horn, brake light
4	15	Clock, cigarette lighter , air conditioning, interior and trunk lighting, cruise control, radio tape recorder
5	–	Not used
6	5	Lamps for right tail lamp, parking lamp and side marker lamp
7	5	Left rear light, parking light and side marker lamp
8	10	Right high beam lamp, high beam indicator lamp;
9		Left headlight main beam
10	10	Low beam, right headlight
11	10	Low beam, left headlight
12	15	Differential lock system, reversing lamp, cruise control, interior heating system
13	15	Fuel pump
14	5	Lamps for license plate, instrument cluster, ashtray, air conditioning control panel, engine compartment and glove box
15	25	Wiper motor, turn signals, air conditioning, heated windshield washer nozzles, engine cooling fan temperature sensor
16	thirty	Heated rear window, heated mirrors
17	thirty	Air conditioning system (fan)
18	15	Rear wiper
19	10	Central door lock, anti-theft system, door lock heating
20	thirty	seat heating
21	10	Diagnostic unit
22	–	Not used
23	5	License plate light
24	–	Not used
25	thirty	Driver seat adjustment motors, driver seat memory unit
26	5	Instrument cluster, electric mirrors, automatic control system, cruise control (if installed)
27	10	Ignition control unit
28	15	Fuel injection control unit
29	10	Heated oxygen sensor
30	–	Not used
31	–	Backup fuses
Relay
1	Not used
2	Relay for switching on the 2nd fan speed
3	Relay for switching on the 1st fan speed
4	Not used
5	Discharge relay
6	Not used
7	Horn relay
8	Relay for controlling automatic transmission and anti-theft system
9	Not used
10	Fuel pump relay
11	Not used

For cars manufactured from 1994 

The fuses are located on the left side of the dashboard.

Description

1. 10A – Right high beam headlamp and high beam warning lamp
2. 10A – Left high beam headlamp
3. 10A – Right dipped beam headlamp
4. 10A – Left dipped beam headlamp
5. 5A – Light on the right
6. 5A – Light on the left
7. 15A – License plate, glove box, engine compartment, temperature control panel,   ashtray and dashboard lamps
8. 15A – Clock, Map Reading Lamps, Trunk Lamp, Cigarette Lighter, Interior Lamps, Visor Lamps, Trip Computer, Rearview Mirror Adjusters, Programmable Seat Adjusters
9. 10A – Stop lamps
10. 15A – Warning lamp
11. 30A – Heater fan, air conditioner
12. 30A – Heated rear window and rear view mirrors
13. 25A – Wipers, turn signals, cooling fan, sprinkler heaters, gearbox oil temperature sensor
14. 15A – Reversing lamps, windshield washers, cruise control, differential lock, multi-function sensor, speedometer sensor, water filter, automatic transmission
15. 5A – Instrument panel, rear view mirrors, on-board computer
16. 15A – Fog lights
17. 20A – Fuel pump, heating valve
18. 15A – Rear window wiper
19. 25A – Diagnostic system, horn, fan relay
20. 5A – Cruise control, automatic transmission
21. 15A – ABS

Central switchgear – No. 4

Only for Audi A6 C4 cars

Description

Number	Description
1	Discharge relay
2	Horn relay
3	Headlight washer system relay
4	Central Locking Relay Tail Lamp Relay (Manual Transaxle) Automatic Transaxle Relay (P / N)
5	Wiper and washer interruption relay
6	Fuel pump relay

Additional mounting box – No. 5

Description

Number	Description
1	Electric window control unit
2	Electric window control unit
3	Electric rearview mirror control unit Automatic window closing
4	ABS combi rearview mirror electric control unit
5	Shift lock control module
6	Automatic gearbox
7	Cooling fan fuse Electronic damping control module (fuse)
8	Cooling fan (fuse)

Junction box 3 – No. 9

Description

Number	Description
1	Not used
2	Airbag warning lamp relay
3	Not used
4	Not used
5	Auxiliary air pump relay
6	Not used
7	Not used
8	Auxiliary air pump fuse in exhaust manifold