1998-2001 Audi A4/S4 Fuse Box Diagram [B5/8D]

The Audi A4/S4 B5/8D is a popular luxury car that was produced from 1998 to 2001. Like all cars, it has a fuse box that houses the electrical fuses for the car’s various systems. If you are having electrical problems with your Audi A4/S4 B5/8D, it can be helpful to consult the fuse box diagram to see which fuse may be blown.

Fuse Box Locations

There are two fuse boxes in the Audi A4/S4 B5/8D:

• Instrument Panel Fuse Box: This is located in the lower-left corner of the dashboard, near the driver’s knee.
• Engine Compartment Fuse Box: This is located in the engine compartment, on the driver’s side.

Instrument Panel

Fuse Number	Description
1	Heated washer jets
2	Turn signals
3	Headlight washer system relay, lighting (glove box) for: engine compartment, air conditioner, 4-speed automatic gearbox, dash panel insert
4	Number plate lights
5	Dash panel insert, seat heating, bulb monitoring, catalytic converter, diesel lights, gearshift display, switch illumination, mirror switch and mirror motors, airbag warning light, ambient temperature indicator, air conditioner, rear window blind, parking aid, navigation system, telephone/ telematics
6	Central locking
7	ABS, brake light switch, clutch pedal switch
8	Telephone/telematics
9	Heated mirrors
10	Automatic headlight range control
11	Cruise control system (automatic gearbox)
12	Voltage supply – diagnosis
13	Brake lights
14	Interior lights, reading lights, anti-theft alarm system, make-up mirrors, seat adjustment memory
15	Dash panel insert, air conditioner, memory (seat adjustment/mlrrors), navigation system
16	ABS, electronic stability program
17	Heated lock cylinders, navigation system, selflevelling suspension, two-way radio, two-way radio for special vehicles
18	Main beam headlight, right
19	Main beam headlight, left
20	Dipped beam headlight, right; headlight range control
21	Dipped beam headlight, left; headlight range control
22	Tail and side lights, right
23	Tail and side lights, left
24	Windscreen wiper system, washer pump, intermittent wiper relay
25	Fresh air blower, air conditioner
26	Heated rear window, mirror heating, air recirculation
27	Rear window wiper, heated steering wheel with electronics
28	Fuel pump/diesel auxiliary pump
29	Engine management
30	Sliding roof
31	Reversing lights, cruise control system, automatic gearbox, rpm boost (V6 2.8L, 128 kW, 2V quattro 5HR180), automatic anti-dazzle interior mirror, EGR valve, diagnosis connector
32	Engine management
33	Cigarette lighter
34	Engine management
35	Trailer socket
36	Front fog lights and rear fog light
37	Radio sound systems
38	Luggage compartment light, central locking
39	Hazard warning lights
40	Horn
41	ABS 5.0 – hydraulic unit (valves)
42	Electronic stability program
43	EGR valve, coolant temperature sensor
44	Seat heating (power circuit)

Relay Panels

13-point relay carrier

Relay Number	Description
1	–
2	Multi-function steering wheel control unit
3	Multi-function steering wheel control unit
4	Bulb monitoring control unit
5	Bulb monitoring control unit
6	Alarm system control unit (taxi)
7	Heated rear window relay
8	Daytime driving lights relay, alarm system control unit (taxi)
9	Headlight relay, alarm system control unit
10	Relay for glow plugs
11	Mirror control unit (with retraction function)
12	Mirror control unit (with retraction function)
13	Automatic gearbox relay
14-17	For police/taxi vehicles
18	–

Micro-central electrics

Relay Number	Description
1	Horn relay
2	Relief relay for X contact
3	–
4	Fuel pump relay, relay for glow plugs
5	Intermittent wash/wipe relay
6	Intermittent wash/wipe relay
A	–
B	–
C	–

8-point relay carrier

Relay Number	Description
1	Radiator fan relay (run-on)
2	Radiator fan relay (maximum speed)
3	Radiator fan relay (80W maximum speed), auxiliary water pump control unit
4	Relay for electronic stability program
5	Active door reflectors control unit
6	–
7	Relay for electronic stability program
8	–
14	Fuse for optional equipment
15	Seat adjustment fuse, front passenger’s side
16	Seat adjustment fuse, driver’s side
17	Repeller system fuse
18	ABS fuse
19	Radiator fan fuse
20	Radiator fan fuse
21	Radiator fan fuse (relay coil)
22	Rear window lifter fuse
23	Front window lifter fuse
24	Fuse for luggage compartment socket (Avant)

3-point relay carrier

Fuse Number	Description
1	Relay 1 for heater elements (coolant)
2	Relay 2 for heater elements (coolant), secondary air pump relay
3	Diesel direct injection system relay, Motronic current supply relay
4	Auxiliary pump fuse
5	Fuse for engine electrics
6	–
7	Fuse 1 for glow plugs, secondary air pump fuse
8	Fuse 2 for glow plugs
9	Fuse for glow plugs – engine

Next Post: 1997-2004 Audi A6/S6 Fuse Box Diagram