Diagrams of fuse boxes and relays – Audi V8 4C

Applies to vehicles manufactured in the years:

1988, 1989, 1990, 1991, 1992, 1993, 1994.

 

Diagram of the fuse box in the passenger compartment

Number	Amperes [A]	Description
1	15	Front fog light, rear fog light
2	15	1988-1990: emergency flasher
	10	1991-1994: Emergency blinker
3	25	1988-1990: Stop light switch, horn
	twenty	1991-1994: Stop Lamp Switch, Horn, Auxiliary Radiator Fan (2nd / 3rd speed) (1993-1994)
4	15	Interior lighting, cigarette lighter, trunk lighting, trip computer, climate control system, radio / speakers, auxiliary radiator fan (1st speed), vanity mirror lighting, clock, socket
5	10	Oxygen sensor heating element
	thirty	Cooling fan (full speed)
6	5	Right side marker and parking lights, Daytime running lights (Canada), Right rear lights (1993-1994)
7	5	Left side marker and parking lights, left rear lights (1993-1994)
8	10	Right high beam headlamp, high beam indicator
9	10	Left high beam headlamp
10	10	Right dipped beam headlamp
11	10	Left-hand dipped beam headlamp
12	15	Headlight washer, auxiliary washer, taillight control unit, reversing lamps, ABS control unit, automatic shift lock, car telephone (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: Wipers / Washers, Turn Signals, Heated Washer Nozzles, Air Conditioner
	15	1991-1994: Wipers / Washers, Turn Signals, Heated Washer Nozzles
16	thirty	1988-1990: Rear Window Defogger, Heated Mirror
	twenty	1991-1994: Rear Window Defogger, Heated Mirror
17	thirty	1988-1990: Air conditioner, heater blower
	twenty	1991-1994: Air Conditioner, Heater Blower
18	25	1988-1990: Electric memory seats
	5	1991-1994: Electric seat memory, outside mirror, central locking (1993-1994)
19	10	Central locking, heated door lock, anti-theft alarm system
	thirty	Central locking, heated door lock
	15	1991-1994: Central Locking, Heated Door Lock
20	25	1988-1990: Heated seats
	thirty	1988-1990: Cooling Fan (Low Speed), Cooling Fan Relay
	thirty	1991-1994: Heated seats
21	twenty	1988-1990: Electric windows
	25	1991-1994: Electric windows, rear cigarette lighter
22	–	–
23	10	Injection valves, heated tube air flow sensor
24	15	Activated carbon canister valve, idle speed stabilization
25	thirty	Electric seats with memory
26	5	Cruise control
27	5	Motronic engine management system
28	5	1988-1990: Instrument Cluster
	15	1991-1994: Instrument Cluster
29	10	Automatic gearbox
30	5	Instrument cluster, on-board computer and function control switch, automatic control system
31	–	–
Relay
R1	horn
R2	Fog lights
R3	Automatic gearbox
R4	–
R5	Washer / wiper intermittent
R6	–
R7	Fuel pump
R8	–
R9	Load reduction
R10	–
R11	–
R13	Radiator fan (third stage)
Circuit breaker
R12	Electric window, electric seats

Passenger compartment relay boxes

Relay box 1

Number	Relay
R1	Air conditioner
R2	Catalyst
R3	Coolant radiator fan (low speed)
R4	Front lights
R5	Electric window / sunroof
R6	–
R7	–
R8	Radiator fan
R9	ABS connection

Relay box 2

Number	Relay
R1	–
R2	Loudspeaker
R3	Alarm light theft warning
R4	Heated driver’s seat
R5	Heated passenger seat
R6	Shift lock
R7	Spare light
R8	Auxiliary wash pump
R9	Heated rear left seat
R10	Heated rear seat right