All Wiring Diagrams for Audi A8 Quattro 1999

AIR CONDITIONING

Automatic A/C Wiring Diagram (1 of 3) for Audi A8 Quattro 1999

List of elements for Automatic A/C Wiring Diagram (1 of 3) for Audi A8 Quattro 1999:

(behind lower left center of dash, on hvac assembly)
(behind lower left center of dash, on hvac assembly) left footwell flap motor/position sensor
(behind lower right center of dash, on hvac assembly) right footwell flap motor/position sensor
(behind right center of dash, on hvac assembly) flap motor temperature regulator/position sensor
(left rear of engine compt)
(left rear of engine compt) recirculation flap motor/ position sensor
A/c control head
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
Air flow flap motor/ back pressure flap motor position sensor
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
Center vent adjusting motor/position sensor
Fresh air blower (center rear of engine compt)
Fresh air blower control module (right rear of engine compt)
G43 (above right kick panel)
Interior monitoring sensors control module
Left center vent motor/position sensor (behind upper left center of dash, on hvac assembly)
Rear footwell vent motor/position sensor (behind lower left center of dash, on hvac assembly)
Red
Right center vent motor/position sensor (behind upper right center of dash, on hvac assembly)
Solid state

Automatic A/C Wiring Diagram (2 of 3) for Audi A8 Quattro 1999

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List of elements for Automatic A/C Wiring Diagram (2 of 3) for Audi A8 Quattro 1999:

(above left kick panel) g44
(above right kick panel) g43
(behind left center of dash) left vent temperature sensor
(behind left center of dash, on hvac assembly) defroster flap motor/ position sensor
(behind right center of dash) right vent temperature sensor
(left rear of engine compt) fresh air intake duct temperature sensor
(on right front footwell e-box relay panel) solar cell separation relay
40a
60a
Air quality sensor
Blower fan fuse
Central electric panel
Coolant fan
Coolant fan control relay (on relay panel)
Coolant fan control series resistance (lower left front of engine compt)
Coolant fan control thermal switch (lower right side of radiator)
Coolant fan fuse
Fuse 4 (st2) 5a
Fuse panel (right front foot- well)
G43 (above right kick panel)
Hot at all times
Hot w/ load reduction relay energized
Left center vent switch (behind upper left center of dash, on vent)
Nca
Red
Second speed coolant fan control relay (on relay panel)
Solar cells
Solar operation control module
Solid state
Third speed coolant fan control relay (below left side of dash)

Automatic A/C Wiring Diagram (3 of 3) for Audi A8 Quattro 1999

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List of elements for Automatic A/C Wiring Diagram (3 of 3) for Audi A8 Quattro 1999:

(above a/c controls, in center console) instrument panel interior temperature sensor
(above left kick panel) g43
(behind center of lower radiator grill) outside air temperature sensor
(in plenum chamber e-box) motronic engine control module
(integral with coolant pump)
(on top
1/+
2/-
A/c clutch
A/c clutch relay (on right front footwell e-box relay panel)
A/c control head
A/c refrigerant high pressure switch (below left headlight)
A/c refrigerant low pressure switch (left rear of engine compt)
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
Center of
Center vent position sensor (behind upper center of dash, on hvac assembly)
Computer data lines system
Coolant pump (left rear of engine compt)
D10
D11
D12
E10
E11
E12
Fuse 4 (st3) 10a
Fuse 5 (st3) 15a
Fuse 7 (st3) 15a
Fuse panel (right front foot- well)
G43 (above left kick panel)
Hot at all times
Hot in run and start
Instrument cluster combination processor
Interior lights system
Interior temperature sensor fan
Left heat regulating valve
Middle defrost vent) sunlight photo sensor
Nca
Protection diode
Right center vent switch (behind upper right center of dash, on vent)
Right heat regulating valve
Solid state
T16a
T26
T26b
Wiper/washer system

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram, AWD for Audi A8 Quattro 1999

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List of elements for Anti-lock Brakes Wiring Diagram, AWD for Audi A8 Quattro 1999:

(above left kick panel) g44
10a
Abs control module (below left side of dash)
Abs inlet valves
Abs outlet valves
Abs return flow pump relay
Abs solenoid valve relay
Abs warning light
Brakelight switch (above brake pedal, on bracket)
C24
Computer data lines system
Data link connector
Exterior lights system
Fuse 1 (st3) 15a
Fuse 10 (st4) 10a
Fuse 4 (st3) 10a
Fuse 50a
Fuse 9 (st2) 10a
Fuse panel (right front footwell)
G44 (above
Hot at all times
Hot in on or start
Instrument cluster
Left front
Left front abs wheel speed sensor
Left kick panel)
Left rear
Left rear abs wheel speed sensor
Motronic engine control module (in plenum chamber e-box)
Red
Relay & fuse panel (right side of luggage compt)
Right front
Right front abs wheel speed sensor
Right rear
Right rear abs wheel speed sensor
T26
T26a
Tf6
Traction control outlet valves
Traction control switch- over valves

Anti-lock Brakes Wiring Diagram, FWD for Audi A8 Quattro 1999

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List of elements for Anti-lock Brakes Wiring Diagram, FWD for Audi A8 Quattro 1999:

(above left kick panel)
10a
A12
Abs control module (below left side of dash)
Abs hydraulic unit (left front of engine compt)
Abs inlet valves
Abs outlet valves
Abs return flow relay & pump
Abs solenoid valve relay
Abs warning light
Anti-slip control switch
Brakelight switch (above brake pedal, on bracket)
C24
Chamber e-box)
Computer data lines system
Data link connector
Exterior lights system
Fuse 1 (st3) 15a
Fuse 10 (st4) 10a
Fuse 25a
Fuse 4 (st3) 10a
Fuse 50a
Fuse 9 (st2) 10a
Fuse panel (right front footwell)
G44
Hot at all times
Hot in on or start
Instrument cluster
Interior lights system
Left front
Left front abs wheel speed sensor
Left rear
Left rear abs wheel speed sensor
Motronic engine control module (in plenum
Red
Relay & fuse panel (right side of luggage compt)
Right front
Right front abs wheel speed sensor
Right rear
Right rear abs wheel speed sensor
T26
T26a
Tach
Tf6
Traction control indicator
Traction control outlet valves
Traction control switch-over valves

ANTI-THEFT

Power Door Locks Wiring Diagram (1 of 2) for Audi A8 Quattro 1999

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List of elements for Power Door Locks Wiring Diagram (1 of 2) for Audi A8 Quattro 1999:

1998-99
50b
86s
Acc
Alarm
All times
Antenna
Battery
C16
Central electric panel
Central locking/ alarm system/ interior light delay control module (at left side of luggage compt, near wheelwell)
Data link connector
Driver's door handle alarm switch
Driver's side door lock switch
Exterior lights system
Fuse 1 (st5) 10a
Fuse 3 (st5) 15a
Fuse 4 (st5) 10a
Fuse 5 (st5) 15a
Fuse panel
G43 (above right
G44 (above left
G44 (above left kick panel)
G59 (near left taillight)
G60 (near right
Hood alarm switch (on right rear of engine compt)
Horn
Hot at
Hot in run
Ignition switch
Instrument cluster combination processor
Interior lights system
Key switch
Kick panel)
Memory systems
Motronic engine control module (ecm) (in plenum chamber e-box)
Nca
Off
Passenger's door handle alarm switch
Power windows system
Radio
Red
S1/ 50z
S4/ 50z
S4/a
S4/b
S6/ 50a
Start
Starter
Starting interlock relay
T10o
T12
T16
T26
T26a
T26b
Taillight)
Trunk lid alarm switch (in trunk lid latch)
Trunk lock alarm/ central locking switch (on trunk lock cylinder housing)
Trunk release system

Power Door Locks Wiring Diagram (2 of 2) for Audi A8 Quattro 1999

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List of elements for Power Door Locks Wiring Diagram (2 of 2) for Audi A8 Quattro 1999:

1998-99
Alarm ind
Blower motor
Driver's side door contact switch (on door latch mechanism)
G43 (above right
G44 (above left
G59 (near left taillight)
Interior monitoring sensors control module (left side of luggage compt)
Interior monitoring switch
Kick panel)
Left interior monitoring sensor (on left upper "b" pillar, behind trim)
Motor blower
Nca
Passenger's side door contact switch (on door latch mechanism)
Rear fog light switch
Right interior monitoring sensor (on right upper "b" pillar, behind trim)

COMPUTER DATA LINES

Computer Data Lines Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Computer Data Lines Wiring Diagram for Audi A8 Quattro 1999:

(fwd)
(quattro)
A/c control head
Abs control module (below left left side of dash)
Air bag control module (below center of dash, on transmission tunnel)
C24
Central locking/ alarm system/ interior light delay control module (at left side of luggage compt, near wheelwell)
Data link connector
Fuse 1 (st3) 15a
Fuse 9 (st1) 10a
Fuse panel
G43 (above right kick panel)
Headlight beam adjusting control module (at base of right "b" pillar)
Hot at all times
Hot in run
Instrument cluster combination processor
Interior monitoring sensors control module (left side of luggage compt)
Motronic engine control module (in plenum chamber e-box)
Multi-function steering wheel control module (on relay panel)
Radio
T16
T26
Transmission control module (in plenum chamber e-box)

COOLING FAN

Cooling Fan Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Cooling Fan Wiring Diagram for Audi A8 Quattro 1999:

60a
A/c control head
A/c refrigerant high pressure switch (below left headlight)
A/c system
C11
C13
C14
C24
Central electric panel
Computer data lines system
Coolant fan
Coolant fan control relay (on relay panel)
Coolant fan control series resistance (lower left front of engine compt)
Coolant fan control thermal switch (lower right side of radiator)
Coolant fan fuse
D10
D12
Data link connector
E12
Fuse 4 (st2) 5a
Fuse panel (right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
Hot at all times
Hot w/ load reduction relay energized
Instrument cluster combination processor
Motronic engine control module (in plenum chamber e-box)
Red
Second speed coolant fan control relay (on relay panel)
Solid state
T16a
T26
T26b
Third speed coolant fan control relay (below left side of dash)

CRUISE CONTROL

Cruise Control Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Cruise Control Wiring Diagram for Audi A8 Quattro 1999:

Brake vacuum dump switch
Brakelight switch (above brake pedal, on bracket)
Cruise control module (in plenum chamber e-box, right rear of engine compt)
Cruise control switch
Cruise control vacuum pump (inside front of left front fender)
Exterior lights system
Fuse 1 (st3) 15a
Fuse 6 (st3) 10a
Fuse 9 (st2) 10a
Fuse panel (right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
Hot at all times
Hot in run or start
Instrument cluster
Multifunction transmission range switch (left side of transmission)
Speedometer vehicle speed sensor (on left side of transmission)
T26
T6f
Transmission control module (in plenum chamber e-box)

DEFOGGERS

Defoggers Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Defoggers Wiring Diagram for Audi A8 Quattro 1999:

75x
C22
Central electric panel
Driver's side heated mirror
Fuse 1 (st2) 10a
Fuse 6 (st2) 30a
Fuse panel
G43 (above right kick panel)
G44 (above left kick panel)
G60 (near right taillight)
Hot at all times
Hot in run
Illum
Interior lights system
Load reduction relay
Motronic engine control module (in plenum chamber e-box)
On ind
Passenger's side heated mirror
Rear defogger switch
Rear window defogger heat element
Rear window defogger switch
S1/31
Solid state

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Electronic Power Steering Wiring Diagram for Audi A8 Quattro 1999:

(1997-99)
(2000-03)
G43 (above right kick panel)
Hot at all times
Ignition switch
Instrument cluster
Off
Run
Servotronic control module (right front footwell e-box relay panel)
Servotronic solenoid valve
Speed signal
Start
T26
T32b

Power Steering Column Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Power Steering Column Wiring Diagram for Audi A8 Quattro 1999:

86s
Fuse 9 (st5) 20a
Fuse panel (right front footwell)
G44 (above left kick panel)
Hot at all times
Ignition switch
Key-in ignition switch
Red
Steering column adjustment axial motor
Steering column adjustment switch
Steering column adjustment vertical motor
Steering column/ belt height adjustment control module (below left front seat)

ENGINE PERFORMANCE

3.7L

3.7L, Engine Performance Wiring Diagram (1 of 3) for Audi A8 Quattro 1999

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List of elements for 3.7L, Engine Performance Wiring Diagram (1 of 3) for Audi A8 Quattro 1999:

(on bottom of throttle body) intake air temperature sensor
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
Anti-lock brakes system (fwd only)
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Battery
Closed throttle position switch/ throttle position sensor
Engine coolant temperature sensor
Fuse s113 15a
Fuse s115 20a
Fuse s116 15a
Fuse s117 15a
G43 (above right kick panel)
G600 (on right cylinder head)
G601 (on left cylinder head)
Hot in start and run
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Ignition coil 7
Ignition coil 8
Motronic engine control module (in plenum chamber e-box)
Nca
Plenum chamber e-box relay & fuse panel (in plenum chamber e-box)
Plug spark
Power output stage 1 (at right side of eng compt, near washer fluid reservoir cap)
Red
Solid state
Spark plug
T4a
Transmission control module (in plenum chamber e-box)
Transmissions system

3.7L, Engine Performance Wiring Diagram (2 of 3) for Audi A8 Quattro 1999

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List of elements for 3.7L, Engine Performance Wiring Diagram (2 of 3) for Audi A8 Quattro 1999:

(above right kick panel) g43
(not used)
(on rear of left cylinder head) camshaft position sensor
87a
87f
Central electric panel
Dti
Engine speed(rpm) sensor (on left front transmission)
Evaporative emission canister purge regulator valve (near air cleaner assembly)
Fuel injector air control valve (on front of intake manifold)
Fuel pump
Fuel pump relay
Fuse panel (at right front of foot- well)
Fuse s1 (st4) 15a
Fuse s3 (st4) 20a
Fuse s4 (st4) 15a
G43 (above right kick panel)
G51 (on right side of luggage compt)
Heated oxygen sensor (ho2s) (near rear of right exhaust manifold)
Heated oxygen sensor (ho2s) 2 (near rear of left exhaust manifold)
Hot at all times
Hot in start and run
Instrument cluster system
Intake change over valve (on front of intake manifold)
Mass air flow (maf) sensor (inside upper air cleaner housing)
Nca
Oxygen sensor (behind twc) (in right exhaust pipe, downstream from three way catalytic converter)
Oxygen sensor 2 (behind twc) (in left exhaust pipe, downstream from three way catalytic converter)
Power output stage 2 (at right side of eng compt, near washer fluid reservoir cap)
Red
Solid state
T4a

3.7L, Engine Performance Wiring Diagram (3 of 3) for Audi A8 Quattro 1999

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List of elements for 3.7L, Engine Performance Wiring Diagram (3 of 3) for Audi A8 Quattro 1999:

Air condi- tioning & anti-lock brakes system
Air condi- tioning & sound system
Air conditioning system
Anti-lock brakes system
Anti-theft system
C1
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
D10
D11
D12
Data link connector
Defogger system
E10
E11
E12
Fuel injectors
G102
G43 (above right kick panel)
Idle air control (iac) valve (at top rear of eng)
Instrument cluster
Instrument cluster combination processor
Knock sensor 1 (under intake manifold, below right cylinder head)
Knock sensor 2 (on left side of eng block)
Leak detection pump
Motronic engine control module (in plenum chamber e-box)
Nca
Red
Speedometer vehicle speed sensor (on left side of transmission, near left driveshaft flange)
T16a
T26
T26a

4.2L

4.2L, Engine Performance Wiring Diagram (1 of 3) for Audi A8 Quattro 1999

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List of elements for 4.2L, Engine Performance Wiring Diagram (1 of 3) for Audi A8 Quattro 1999:

(on bottom of throttle body) intake air temperature sensor
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
Anti-lock brakes system (fwd only)
B10
B11
B12
B13
B14
B15
B16
B17
B18
B19
B20
B21
B22
B23
B24
Battery
Closed throttle position switch/ throttle position sensor
Engine coolant temperature sensor
Fuse s113 15a
Fuse s115 20a
Fuse s116 15a
Fuse s117 15a
G43 (above right kick panel)
G600 (on right cylinder head)
G601 (on left cylinder head)
Hot in start and run
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Ignition coil 7
Ignition coil 8
Motronic engine control module (in plenum chamber e-box)
Nca
Plenum chamber e-box relay & fuse panel (in plenum chamber e-box)
Plug spark
Power output stage 1 (at right side of eng compt, near washer fluid reservoir cap)
Red
Solid state
Spark plug
T4a
Transmission control module (in plenum chamber e-box)
Transmissions system

4.2L, Engine Performance Wiring Diagram (2 of 3) for Audi A8 Quattro 1999

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List of elements for 4.2L, Engine Performance Wiring Diagram (2 of 3) for Audi A8 Quattro 1999:

(above right kick panel) g43
(not used)
(on rear of left cylinder head) camshaft position sensor
87a
87f
Central electric panel
Dti
Engine speed(rpm) sensor (on left front transmission)
Evaporative emission canister purge regulator valve (near air cleaner assembly)
Fuel injector air control valve (on front of intake manifold)
Fuel pump
Fuel pump relay
Fuse panel (at right front of foot- well)
Fuse s1 (st4) 15a
Fuse s3 (st4) 20a
Fuse s4 (st4) 15a
G43 (above right kick panel)
G51 (on right side of luggage compt)
Heated oxygen sensor (ho2s) (near rear of right exhaust manifold)
Heated oxygen sensor (ho2s) 2 (near rear of left exhaust manifold)
Hot at all times
Hot in start and run
Instrument cluster system
Intake change over valve (on front of intake manifold)
Mass air flow (maf) sensor (inside upper air cleaner housing)
Nca
Oxygen sensor (behind twc) (in right exhaust pipe, downstream from three way catalytic converter)
Oxygen sensor 2 (behind twc) (in left exhaust pipe, downstream from three way catalytic converter)
Power output stage 2 (at right side of eng compt, near washer fluid reservoir cap)
Red
Solid state
T4a

4.2L, Engine Performance Wiring Diagram (3 of 3) for Audi A8 Quattro 1999

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List of elements for 4.2L, Engine Performance Wiring Diagram (3 of 3) for Audi A8 Quattro 1999:

Air condi- tioning & anti-lock brakes system
Air condi- tioning & sound system
Air conditioning system
Anti-lock brakes system
Anti-theft system
C1
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
D10
D11
D12
Data link connector
Defogger system
E10
E11
E12
Fuel injectors
G102
G43 (above right kick panel)
Idle air control (iac) valve (at top rear of eng)
Instrument cluster
Instrument cluster combination processor
Knock sensor 1 (under intake manifold, below right cylinder head)
Knock sensor 2 (on left side of eng block)
Leak detection pump
Motronic engine control module (in plenum chamber e-box)
Nca
Red
Speedometer vehicle speed sensor (on left side of transmission, near left driveshaft flange)
T16a
T26
T26a

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Back-up Lamps Wiring Diagram for Audi A8 Quattro 1999:

Automatic dimmer inside mirror (if equipped)
Fuse 6 (st3) 10a
Fuse panel (right front footwell)
G60 (near right taillight)
Hot in run or start
Left back-up light
Mirror memory control module (if equipped) (base of left "b" compt)
Multi-function transmission range switch (left side of transmission)
Nca
Reverse
Right back-up light

Exterior Lamps Wiring Diagram, with DRL (1 of 2) for Audi A8 Quattro 1999

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List of elements for Exterior Lamps Wiring Diagram, with DRL (1 of 2) for Audi A8 Quattro 1999:

(above right kick panel)
1998,
Battery
Brake
Brake light switch (above pedal, on bracket)
Central electric panel
Central locking/ alarm system/ interior light delay module
Daytime running lights switch-on relay (on right front footwell e-box relay panel)
Fuse 1 (st1) 5a
Fuse 1 (st3) 15a
Fuse 2 (st1) 5a
Fuse 9 (st2) 10a
Fuse panel (right front footwell)
G43
G43 (above right kick panel)
G44 (above left kick panel)
G59 (near left taillight)
Head
Headlights system
High mount brake light
Hot at all times
Hot in run or start
Ignition switch
Lamp control module (on right front footwell e-box relay panel)
Left front side turn light
Left front turn/ side marker light
Left headlamp assembly
Left rear side marker light
Left taillamp assembly
Light switch
Mark
Off
Park
Red
Run
S1/75
Start
T10
T14
Tail
Turn

Exterior Lamps Wiring Diagram, with DRL (2 of 2) for Audi A8 Quattro 1999

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List of elements for Exterior Lamps Wiring Diagram, with DRL (2 of 2) for Audi A8 Quattro 1999:

(1997)
(above left kick panel)
(above right kick panel) g43
Brake
Emergency flasher relay (on right front footwell e-box relay panel)
Emergency flasher switch
Exterior lights system
Fuse 7 (st1) 15a
Fuse 8 (st2) 10a
Fuse panel (right front footwell)
G43 (above right kick panel)
G44
G44 (above left kick panel)
G60 (near right taillight)
Hot at all times
Hot w/ load reduction relay energized
Instrument cluster
Interior lights system
Left
Left tail light
Left turn
License plate lights
Light switch
Mark
Off
Park
Park (1997)
Park (1998, 1999)
Red
Right
Right front side turn light
Right front turn/ side marker light
Right headlamp assembly
Right rear side marker light
Right tail light
Right taillamp assembly
Right turn
T26a
T26b
T6f
Tail
Turn
Turn signal relay (on relay panel)

Exterior Lamps Wiring Diagram, without DRL (1 of 2) for Audi A8 Quattro 1999

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List of elements for Exterior Lamps Wiring Diagram, without DRL (1 of 2) for Audi A8 Quattro 1999:

(above right kick panel)
Battery
Brake
Brake light switch (above pedal, on bracket)
Central locking/ alarm system/ interior light delay module
Exterior lights system
Fuse 1 (st1) 5a
Fuse 1 (st3) 15a
Fuse 2 (st1) 5a
Fuse 3 (st2) 5a
Fuse 9 (st2) 10a
Fuse panel (right front footwell)
G43
G43 (above right kick panel)
G44 (above left kick panel)
G59 (near left taillight)
G60 (near right taillight)
Head
Headlights system
High mount brake light
Hot at all times
Hot in run or start
Lamp control module (on right front footwell e-box relay panel)
Left front side turn light
Left front turn/ side marker light
Left headlamp assembly
Left rear side marker light
Left tail light
Left taillamp assembly
License plate lights
Light switch
Mark
Off
Park
Red
Right tail light
T10
T14
Tail
Turn

Exterior Lamps Wiring Diagram, without DRL (2 of 2) for Audi A8 Quattro 1999

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List of elements for Exterior Lamps Wiring Diagram, without DRL (2 of 2) for Audi A8 Quattro 1999:

(1997)
(above left kick panel)
(above right kick panel) g43
Brake
Central locking/ alarm system/ interior light delay module
Emergency flasher relay (on right front footwell e-box relay panel)
Emergency flasher switch
Fuse 7 (st1) 15a
Fuse 8 (st2) 10a
Fuse panel (right front footwell)
G43 (above right kick panel)
G44
G44 (above left kick panel)
G60 (near right taillight)
Hot at all times
Hot w/ load reduction relay energized
Instrument cluster
Interior lights system
Left
Left turn
Light switch
Mark
Off
Park
Park (1997)
Park (1998, 1999)
Red
Right
Right front side turn light
Right front turn/ side marker light
Right headlamp assembly
Right rear side marker light
Right taillamp assembly
Right turn
T10
T26a
T26b
T6f
Tail
Turn
Turn signal relay (on relay panel)

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 2) for Audi A8 Quattro 1999

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List of elements for Ground Distribution Wiring Diagram (1 of 2) for Audi A8 Quattro 1999:

(1997 w/ delta radio)
(1997)
(1998-99)
A/c control head
Air quality sensor anti-slip switch ashtray light center instrument panel vent illumination center vent position sensor data link connector emergency flasher relay emergency flasher switch fog light switch glove compartment light multi-function transmission range switch light parking brake warning light switch rear foglight switch rear seat outlet light (center) rear seat outlet light (left) rear seat outlet light (right) rear window defogger switch tiptronic switch
Airbag control module drivers side crash sensor left front a pillar microswitch passengers side crash sensor right front a pillar microswitch
Amplifier amplifier shield left rear woofer power antenna right rear woofer telephone cutoff relay
Automatic dimming inside mirror drivers heated seat adjuster entry & floor light relay front interior light glove compartment light left rear reading light mirror fold-away function control module passengers heated seat adjuster passengers heated seat temperature sensor passengers seat heating elements rear cigarette lighter rear headrest adjust switch rear window shade switch right rear reading light sunroof control module
Battery
Board computer reset button central electric panel cigarette lighter cruise control module daytime running lights change-over relay daytime running lights switch-on relay fuel pump relay glove compartment switch headlight washer system relay heated oxygen sensor shields lamp control module load reduction relay sevotronic control module wiper/washer intermittent relay
Brake pad wear element coolant fan control thermal switch headlight beam adjusting control module headlight washer pump left headlamp beam adjusting motor right front turn/side marker light right headlamp assembly right headlamp beam adjusting motor right side turn signal light windshield washer pump
Camshaft position sensor mass air flow sensor motronic engine control module power output stage 1 power output stage 2 sensor shields throttle position sensor
Deck lid central locking system motor left backup light left rear fog light left tail light license plate lights right backup light right tail light trunk lid alarm switch trunk lock alarm/central locking switch
Fresh air blower control module fresh air blower switch thermotonic control module
Fuel pump
G43 (above right kick panel)
G51 (right side of luggage compt)
G60 (near right taillight)
High mount brake light left rear heated seat regulating switch left rear heated seat temperature sensor left rear seat heating elements passengers compartment monitoring switch rear window shade control module right rear ashtray light right rear door contact switch right rear heated seat regulating switch right rear heated seat temperature sensor right rear power window control module right rear seat heating elements
Hood alarm switch left washer nozzle heater right washer nozzle heater transmission control module
Left instrument panel vent illumination right instrument panel vent illumination
Left rear headrest lower relay left rear seat headrest adjustment switch left rear seat lumbar height adjustment switch right rear headrest lower relay right rear seat headrest adjustment switch right rear seat lumbar height adjustment switch
Luggage compartment light right rear side marker light right taillamp assembly
Multi-function transmission range switch transmission control module vehicle speed sensor (speedometer)
Passengers door contact switch passengers door handle alarm switch passengers heated side mirror right front power window control module right heated door lock control module
Radio
Rear window defogger
Telephone transceiver

Ground Distribution Wiring Diagram (2 of 2) for Audi A8 Quattro 1999

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List of elements for Ground Distribution Wiring Diagram (2 of 2) for Audi A8 Quattro 1999:

(1997)
(fwd)
(quattro)
(w/ lumbar)
A/c pressure switch engine coolant level warning switch left front turn/side marker light left headlamp assembly left side turn signal light
Abs control module
Abs hydraulic unit
Alarm horn central locking/alarm system/ interior light delay control module interior monitoring sensors control module left luggage compartment light left rear side marker light left taillamp assembly
Brake fluid level warning switch board computer reset button instrument cluster kick down switch multi-function steering wheel control module steering wheel control unit turn signal relay windshield wiper motor
Coolant fan dual horns
Drivers backrest stop switch drivers belt height adjustment switch drivers seat adjustment switches drivers seat lumbar switch passengers backrest stop switch passengers seat belt height adjustment switch passengers seat adjustment switches passengers seat lumbar switch
Drivers door contact switch drivers door handle alarm switch drivers door lock switch drivers heated side mirror left front power window control module left front window switch left heated door lock control module left rear window console switch mirror selector switch right front window switch right rear window console switch window lockout switch
Drivers heated seat temperature sensor drivers seat heating elements left rear ashtray light left rear door contact switch left rear power window control module left seat belt switch memory mirror control module steering column adjustment switches steering column/belt adjustment control module
G44 (above left kick panel)
G59 (near left taillight)
G600 (on right cylinder head)
G601 (on right cylinder head)
Ignition coil 1 ignition coil 2 ignition coil 3 ignition coil 4
Ignition coil 5 ignition coil 6 ignition coil 7 ignition coil 8

HEADLIGHTS

Headlamp Beam Adjustment Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Headlamp Beam Adjustment Wiring Diagram for Audi A8 Quattro 1999:

Data link connector
Fuse 1 (st3) 15a
Fuse panel (right front footwell)
G43 (above right kick panel)
Head
Headlight beam adjusting control module (at base of right "b" pillar, behind trim)
Hot in run
Hot in run or start
Instrument cluster
Left front level control system sensor
Left headlight beam adjusting motor
Left rear level control system sensor
Light switch
Off
Park
T14
T26
Vehicle speed signal

Headlamps & Fog Lamps Wiring Diagram, with DRL for Audi A8 Quattro 1999

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List of elements for Headlamps & Fog Lamps Wiring Diagram, with DRL for Audi A8 Quattro 1999:

(1997)
(above
(above left kick panel) g44
(above right kick panel) g43
Alarm system indicator
Anti- theft system
Battery
Daytime running lights change-over relay (on right footwell e-box)
Daytime running lights switch-on relay (on right footwell e-box)
Exterior lights system
Fog lamp
Fog light relay (on right front footwell e-box auxiliary fuse & relay panel)
Fog light switch
Front & rear fog light switch
Fuse 1 (st3) 15a
Fuse 2 (st1) 5a
Fuse 3 (st1) 15a
Fuse 3 (st2) 5a
Fuse 4 (st1) 15a
Fuse 5 (st1) 10a
Fuse 5 (st2) 15a
Fuse 6 (st1) 10a
Fuse panel (right front foot- well)
G43 (above
G43 (above right kick panel)
G44 (above left kick panel)
G60 (near right taillight)
Head
Headlamp dimmer switch
High beam
High beam indicator
Hot in run or start
Hot w/ load reduction relay energized
Ignition switch
Illum
Instrument cluster
Instrument cluster system
Interior lights system
Lamp control module (on right front footwell e-box relay panel)
Left headlamp assembly
Left rear fog light
Light switch
Low beam
Low beam/ rear light indicator
Nca
Off
Park
Power distribution system (load reduction relay)
Red
Right headlamp assembly
Right kick panel)
Right kick panel) g43
Run
Series resistance wiring
Start
T14
T26a
T26b
T6f
W/ high intensity gas discharge headlamps
W/o high intensity gas discharge headlamps

Headlamps & Fog Lamps Wiring Diagram, without DRL for Audi A8 Quattro 1999

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List of elements for Headlamps & Fog Lamps Wiring Diagram, without DRL for Audi A8 Quattro 1999:

(above right kick panel) g43
1998-99
Alarm system indicator
Anti- theft system
Battery
Dimmer switch
Exterior lights system
Fog lamp
Fog light relay (on right front footwell e-box auxiliary fuse & relay panel)
Fog light switch
Front & rear fog light switch
Fuse 1 (st3) 15a
Fuse 3 (st1) 15a
Fuse 3 (st2) 5a
Fuse 4 (st1) 15a
Fuse 5 (st1) 10a
Fuse 5 (st2) 15a
Fuse 6 (st1) 10a
Fuse panel (right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
G60 (near right taillight)
Head
Headlamp
High beam
High beam indicator
Hot in run or start
Ignition switch
Illum
Instrument cluster
Instrument cluster system
Interior lights system
Lamp control module (on right front footwell e-box relay panel)
Left headlamp assembly
Left rear fog light
Light switch
Low beam
Low beam/ rear light indicator
Off
Park
Power distribution system (load reduction relay)
Red
Right headlamp assembly
Run
Start
T14
T26a
T26b
T6f
W/ high intensity gas discharge headlamps
W/o high intensity gas discharge headlamps

HORN

Horn Wiring Diagram, with Steering Wheel Controls for Audi A8 Quattro 1999

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List of elements for Horn Wiring Diagram, with Steering Wheel Controls for Audi A8 Quattro 1999:

Battery
Central electric panel
Dual horn relay
Dual horns
Fuse 8 (st1) 15a
Fuse panel (at right front footwell)
G44 (above left kick panel)
Horn button
Ignition switch
Light switch
Off
Red
Run
S1/30ah
S1/71
S1/75
S1/87h
Start
Steering wheel
T5b

Horn Wiring Diagram, without Steering Wheel Controls for Audi A8 Quattro 1999

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List of elements for Horn Wiring Diagram, without Steering Wheel Controls for Audi A8 Quattro 1999:

Battery
Central electric panel
Dual horn relay
Dual horns
Fuse 8 (st1) 15a
Fuse panel (at right front footwell)
G44 (above left kick panel)
Horn button
Ignition switch
Light switch
Off
Red
Run
S1/30ah
S1/71
S1/75
S1/87h
Start
Steering wheel
T5b

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 3) for Audi A8 Quattro 1999

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List of elements for Instrument Cluster Wiring Diagram (1 of 3) for Audi A8 Quattro 1999:

(in left side of fuel tank) fuel gauge sender 2
(in right side of fuel tank) fuel gauge sender 1
86s
A/c control head
Brake fluid level warning switch (on brake fluid reservoir)
Catalyst monitor warning
Combination processor
Cooling fans system
D12
Digital clock hour set button
Digital clock minute set button
Ect gauge
Electronic voice check button
Engine coolant level warning switch (at bottom of coolant reservoir)
Engine coolant temperature sensor
Exterior lights system
Fuel gauge
Fuse 1 (st3) 15a
Fuse 4( st3) 10a
Fuse panel (at right front foot- well)
G44 (above left kick panel)
Generator warning
High beam ind
Hot at all times
Hot in run and start
I/p dimmer light switch
Ignition switch
Instrument cluster
Interior lights system
Key-in ignition switch
Lamp control module
Left seat belt switch (inside left front seat belt buckle)
Left turn signal
Parking brake
Red
Right turn signal
Speedometer
T26a/15
T26a/16
T26a/19
T26a/20
T26a/21
T26a/22
T26a/9
T26b
T26b/12
T6f/2
T6f/6
Tachometer
Tf6
Tf6/1
Tf6/2
Tf6/3
Tf6/4
Tf6/5
Tf6/6
Traction control ind
Trip odometer reset switch
Wiper/washer system

Instrument Cluster Wiring Diagram (2 of 3) for Audi A8 Quattro 1999

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List of elements for Instrument Cluster Wiring Diagram (2 of 3) for Audi A8 Quattro 1999:

(below left side of dash) (w/ edl) abs control module
(in plenum chamber e-box) motronic engine control module
(on right front foot- well e-box relay) servtronic control module
(turn signal switch)
A/c control head
Board computer function selector switch
C10
C12
C13
Central locking/alarm system/interior light delay control module (left side of luggage compt)
Driver door contact switch (on driver door latch mechanism)
G43 (above right kick panel)
Generator
Hot at all times
Ignition switch
Light switch
Off
Run
Start
T16
Wiper/washer intermittent relay (on right front footwell e-box central electric panel)

Instrument Cluster Wiring Diagram (3 of 3) for Audi A8 Quattro 1999

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List of elements for Instrument Cluster Wiring Diagram (3 of 3) for Audi A8 Quattro 1999:

(w/ front wheel drive)
(w/ quattro)
Abs control module (w/ edl) (below left side of dash)
Abs warning
Airbag control module (below center of dash)
Airbag mil
Battery above 2.5v
Brake fluid level warning
Brake pad wear ind
Brake warning
Combination processor
Computer data lines system
Coolant level/temp
Cooling fans system
Digital clock
Doors closed ind
Fuel reserve warning
G43 (above right kick panel)
G60 (near right taillight)
Headlights system
Instrument cluster
Interior lights system
Left brake pad wear indicator element
Low beam/ rear light ind
Nca
Oil pressure switch (on right side of engine)
Oil pressure warning
Ok ind
Park light ind
Parking brake warning light switch (below brake lever, in center console)
Right brake pad wear indicator element
Seat belt warning
Speedo- meter vehicle speed sensor (on left side of trans- mission)
T26
T26/1
T26/18
T26/19
T26/2
T26/22
T26/23
T26/24
T26/25
T26/26
T26/3
T26/4
T26/5
T26/7
T26/9
T26a/15
T26a/16
T26a/19
T26a/20
T26a/21
T26a/22
T26a/25
T26a/26
T26a/8
T26a/9
T26b/1
T26b/10
T26b/11
T26b/14
T26b/17
T26b/18
T26b/19
T26b/2
T26b/20
T26b/21
T26b/22
T26b/25
T26b/26
T26b/3
T26b/4
T26b/5
T26b/6
T26b/7
T26b/8
T26b/9
Tr selector lever display
Trans- mission control module (in plenum chamber e-box)
Trunk lid alarm switch (in trunk lid latch)
Vehicle speed control warning
Washer fluid level

INTERIOR LIGHTS

Interior Lights Wiring Diagram (1 of 3) for Audi A8 Quattro 1999

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List of elements for Interior Lights Wiring Diagram (1 of 3) for Audi A8 Quattro 1999:

(above right kick panel) g43
A/c control head
Anti-slip control switch
Center instrument panel vent illumination
Combination processor
Driver's heated seat adjuster
Emergency flasher switch
Exterior lights system
Front and rear fog light switch
Fuse 3 (st2) 5a
Fuse 9 (st1) 10a
Fuse panel (at right front foot- well)
G43 (above right kick panel)
Glove compartment actuation lighting
Head
Head off
Hot at all times
Ignition switch
Instrument cluster
Instrument panel light dimmer switch
Left instrument panel vent illumination
Left make-up mirror light
Left rear heated seat regulating switch
Light switch
Off
Park
Passenger's heated seat adjuster
Protection diode
Radio
Rear cigarette lighter
Rear fog light switch
Rear head rest adjustment switch
Rear seat center outlet light
Rear seat left outlet light
Rear seat right outlet light
Rear window defogger switch
Rear window shade switch
Red
Right instrument panel vent illumination
Right make-up mirror light
Right rear heated seat regulating switch
Run
Selector lever light
Selector lever light relay
Start
T26
T26b
T6f

Interior Lights Wiring Diagram (2 of 3) for Audi A8 Quattro 1999

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List of elements for Interior Lights Wiring Diagram (2 of 3) for Audi A8 Quattro 1999:

(above right kick panel) g43
A/c control head
Ashtray light
Central electric panel
Cigarette lighter
E-box relay panel
Entry & floor light relay
Fold- away mirror switch
Fuse 1 (st5) 10a
Fuse 2 (st5) 10a
Fuse 3 (st5) 15a
Fuse panel (at right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
G60 (near right taillight)
Glove compartment light
Hot at all times
Hot w/ load reduction relay energized
Inside mirror automatic dimmer
Left luggage compart- ment light
Left rear ashtray light
Left rear reading light
Luggage compart- ment light
Memory program switch
Right front map/reading light and left front reading light
Right rear ashtray light
Right rear reading light
T1an
T6ab

Interior Lights Wiring Diagram (3 of 3) for Audi A8 Quattro 1999

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List of elements for Interior Lights Wiring Diagram (3 of 3) for Audi A8 Quattro 1999:

(above right kick panel) g43
(in console)
(in door)
Central locking/alarm system/ interior light delay control module (left side of luggage compt)
Door warning light
Driver's door lock switch
Driver's side door contact switch
G43 (above right kick panel)
G44 (above left kick panel)
Left footwell light
Left front entry light
Left front window switch
Left rear door contact switch
Left rear door warning light
Left rear entry light
Left rear window switch
Passenger's door warning light
Passenger's side door contact switch
Power windows system
Right footwell light
Right front entry light
Right front window switch (in console)
Right front window switch (in door)
Right rear door contact switch
Right rear door warning light
Right rear entry light
Right rear window switch
T10o
T12
T16
Window lockout switch

MEMORY SYSTEMS

Driver"s Memory Seat Wiring Diagram (1 of 2) for Audi A8 Quattro 1999

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List of elements for Driver"s Memory Seat Wiring Diagram (1 of 2) for Audi A8 Quattro 1999:

Central locking/ alarm system/ interior light delay control module (left side of luggage compt)
Driver's seat backrest adjusting motor
Driver's seat backrest stop switch
Driver's seat fore/ aft adjusting motor
Driver's seat front height adjusting motor
Driver's seat headrest adjusting motor
Driver's seat lumbar support adjustment switch
Driver's seat rear height adjusting motor
G44 (above left kick panel)
Memory mirrors circuit
Memory seat control module (on bottom of left front seat)
Memory steering column circuit
Red
T16

Driver"s Memory Seat Wiring Diagram (2 of 2) for Audi A8 Quattro 1999

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List of elements for Driver"s Memory Seat Wiring Diagram (2 of 2) for Audi A8 Quattro 1999:

Back- rest
Circuit breaker 44 30a
Driver's seat adjustment switch
Fore/ aft
Front height
Fuse 2 (st5) 10a
Fuse 3 (st5) 15a
Fuse panel (at right front footwell)
G44 (above left kick panel)
Head- rest
Hot at all times
Hot w/ load reduction relay energized
Memory program switch
Rear height
Red
Right front footwell e-box auxiliary fuse & relay panel

Memory Column & Belt Height Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Memory Column & Belt Height Wiring Diagram for Audi A8 Quattro 1999:

86s
Circuit breaker 44 30a
Driver's belt height adjustment switch
Driver's memory seat circuit
Fuse 3 (st5) 15a
Fuse 9 (st5) 20a
Fuse panel (at right front footwell)
G44 (above left kick panel)
Hot at all times
Ignition switch
Key-in ignition switch
Left seat belt motor
Memory mirror control module (base of left "b" pillar)
Memory program switch
Memory seat control module (bottom of left front seat)
Red
Right front footwell e-box auxiliary fuse & relay panel
Steering column adjustment axial motor (right side of steering column)
Steering column adjustment switch
Steering column adjustment vertical motor (left side of steering column)
Steering column/ belt height control module (below left front seat)

Memory Mirrors Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Memory Mirrors Wiring Diagram for Audi A8 Quattro 1999:

(above left kick panel) g44
(above right kick panel) g43
A10
B10
Back-up lights
De- fog
Driver's side mirror
Fold- away
Fuse 1 (st2) 10a
Fuse 2 (st5) 10a
Fuse 3 (st5) 15a
Fuse panel (at right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
Hot at all times
Hot w/ load reduction relay energized
Memory mirror control module (at base of left "b" pillar, behind trim)
Memory seat control module
Mirror adjustment switch
Mirror fold-away control module (if equipped) (on right front footwell e-box relay panel)
Passenger's side mirror
Position
Steering column/ belt height adjustment control module

POWER ANTENNA

Power Antenna Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Power Antenna Wiring Diagram for Audi A8 Quattro 1999:

Antenna lead
Fuse 1 (st3) 15a
Fuse 92 20a
Fuse panel (at right front footwell)
G60 (near right taillight)
Hot at all times
Hot in start and run
Nca
Power antenna
Radio
Relay & fuse panel (at right side of luggage compt)
Solid state
T1o
T2bo

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Audi A8 Quattro 1999

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Audi A8 Quattro 1999:

1998,
50b
86s
A22
Abs control module
Abs control module (1998-99 quattro)
Abs hydraulic unit
Amplifier, left/right rear woofer, power antenna, radio
Battery
Central electric panel
Central locking/ alarm system/ interior light delay control module
Connector tv1
Connector tv2
D50/a32
Daytime running lights switch on relay
Dual horn relay
Dual horns
E20/a32
Evaporative emission canister purge regulator valve, intake change-over valve, fuel injector air control valve, leak detection pump
Fuse 15a
Fuse 20a
Fuse 25a
Fuse 50a
Fuse 8 (st1) 15a
Fuse 9 (st4) 5a
Fuse panel
G43 (above right kick panel)
Ignition switch
Instrument cluster, central locking/ alarm system/ interior light delay control module, radio, steering column/belt height control module
Key-in ignition switch
Left/right rear head rest adjustment switch, left/right rear head rest lower relay, left/right rear seat lumbar support height adjustment switch
Left/right rear seat regulating switch
Load reduction relay
Motronic engine control module
Motronic engine control module, fuel injectors
Off
Plenum chamber e-box relay & fuse panel
Red
Relay & fuse panel
Run
S1/
S1/ 30ah
S1/ 87h
S1/50z
S4/50z
S4/a
S4/b
S6/50a
Start
Starter
Starting interlock relay
Steering wheel control module
Telephone transceiver
To central electric panel (diagram 2 of 4)
To fuse 6 (st3) (diagram 3 of 4)
To light switch (diagram 2 of 4)
Transmission control module
Voltage regulator/ generator
Voltage regulator/ generator, instrument cluster
Wiper/washer intermittent relay

Power Distribution Wiring Diagram (2 of 4) for Audi A8 Quattro 1999

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Audi A8 Quattro 1999:

(diagram 1 of 4)
75x
A/c control head, instrument panel interior temperature sensor, instrument cluster, solar cell separation relay, steering wheel control module
A37
A51
Brake light switch, vacuum dump valve
Central electric panel
Cigarette lighter
Coolant pump, left/right heat regulating valve
Daytime running lights change- over relay
Daytime running lights switch on relay
E107
E108
E109
E116
Emergency flasher switch
Fog light relay
Fog light relay, license plate lights (w/o drl), left/right taillights (w/o drl), ashtray light, multi-function transmission range switch, selector lever light relay protection diode, telephone transceiver, a/c control head
Fog light switch, rear fog light switch
From a central electric panel b
From ignition switch (diagram 1 of 4)
Fuse 1 (st1) 5a
Fuse 2 (st1) 5a
Fuse 3 (st1) 15a
Fuse 3 (st2) 5a
Fuse 3 (st3) 15a
Fuse 4 (st1) 15a
Fuse 4 (st3) 5a
Fuse 5 (st1) 10a
Fuse 5 (st2) 15a
Fuse 6 (st1) 10a
Fuse 7 (st1) 15a
Fuse 7 (st3) 15a
Fuse 9 (st1) 5a
Fuse 9 (st2) 10a
Fuse panel
G43 (above right kick panel)
Headlight beam adjustment control module
Headlight dimmer/ flasher switch
Headlight high beam indicator light
Instrument cluster
Instrument cluster, data link connector, solar cell separation relay, selector lever light relay
Interior lights system
Lamp control module
Lamp control module, right parking light, right front side marker light left/right taillights (w/ drl), license plate lights (w/ drl)
Lamp control module, left parking light, left front side marker light
Left high beam headlight
Light light switch switch
Red
Right front footwell e-box relay panel
Right high beam headlight
Series resistance wiring
To central electric panel (diagram 3 of 4)
To central electric panel (diagram 4 of 4)
W/ drl
W/o drl
W/o drl w/ drl
Wiper/ washer intermittent relay

Power Distribution Wiring Diagram (3 of 4) for Audi A8 Quattro 1999

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Audi A8 Quattro 1999:

10a
75x
87f/ dti
A/c clutch relay, a/c refrigerant low pressure switch, left/right heat regulating valves, thermotronic control module, a/c control head
A/c control head, fresh air blower, interior monitoring sensors control module
A34
Airbag control module
B110
C.b. 30a
Central electric panel
Central electric panel (diagram 2 of 4)
Coolant pump
Driver's & passenger's side mirror
Emergency flasher switch
From g
From ignition switch (diagram 1 of 4)
Fuel pump
Fuel pump relay
Fuse 1 (st2) 10a
Fuse 1 (st4) 15a
Fuse 10 (st2) 5a
Fuse 2 (st3) 10a
Fuse 20a
Fuse 3 (st4) 20a
Fuse 4 (st4) 15a
Fuse 40a
Fuse 5 (st3) 15a
Fuse 6 (st2) 30a
Fuse 6 (st3) 10a
Fuse 8 (st2) 10a
Fuse 8 (st3) 15a
Fuse 9 (st3) 10a
Fuse panel
Heated oxygen sensors
Heated oxygen sensors, mass air flow sensor
Left front power window control module
Left rear power window control module
Left washer nozzle heater
Motronic engine control module
Motronic engine control module, ignition coils
Multi-function transmission range switch, shift lock solenoid
Passenger's seat lumbar support adjustment switch, passenger's seat adjustment switch, passenger's belt height adjustment
Plenum chamber e-box relay & fuse panel
Rear window defogger switch
Red
Right front footwell e-box auxiliary fuse & relay panel
Right front power window control module
Right rear power window control module
Right washer nozzle heater
S2/87f
S3/
S3/ 87a
S3/s
Servotronic control module
Solar cell separation relay
Solar cell separation relay (w/ sunroof)
Steering wheel control module
Switch
Telephone transceiver
To central electric panel (diagram 4 of 4)
Transmission control module
W/ sunroof
W/o sunroof

Power Distribution Wiring Diagram (4 of 4) for Audi A8 Quattro 1999

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Audi A8 Quattro 1999:

(diagram 3 of 4)
10a
58a
75x
Abs control module, anti- slip control switch (w/ fwd), brake light switch (quattro)
B115
Central electric panel
Central locking/ alarm system/ interior light delay control module, interior monitoring sensors control module, driver's side door lock switch
Central locking/alarm system/interior lights delay control module, rear window shade switch, automatic dimmer inside mirror
Coolant fan control relay, second speed coolant fan control relay, third speed coolant fan control relay
Coolant fan control relay, second speed coolant fan control relay, third speed coolant fan relay, air quality sensor
D51
Data link connector, instrument cluster, lamp control module, steering wheel control module, radio, left/ right headlight beam adjusting motor, headlight beam adjusting control module
From fuse 3 (st2) (diagram 2 of 4)
From j central electric panel k
Fuse 1 (st3) 15a
Fuse 1 (st5) 10a
Fuse 10 (st1) 25a
Fuse 10 (st4) 10a
Fuse 10 (st5) 20a
Fuse 2 (st5) 10a
Fuse 3 (st5) 10a
Fuse 4 (st2) 5a
Fuse 4 (st5) 10a
Fuse 5 (st5) 15a
Fuse 6 (st5) 20a
Fuse 60a
Fuse 7 (st5) 15a
Fuse 8 (st5) 10a
Fuse 9 (st5) 20a
Fuse panel
G43 (above right kick panel)
Glove compartment light, a/c control head, telephone transceiver, instrument cluster, left/right rear ashtray light
Headlight washer pump
Headlight washer system relay
Left/right front power window module, mirror adjustment switch, mirror fold-away function control module, memory program switch, rear head- rest adjustment switch, left/right "b" pillar micro switch, driver's/passenger's heated seat switch
Luggage compartment release switch, left/right make up mirror light, entry/ floor light relay, interior monitoring sensors control module, driver's side interior lock switch, mirror memory control module, memory program switch
Memory program switch, mirror memory control module
Power sunroof control module
Rear fog light switch, front interior light, left/right rear reading light, central locking/alarm system/interior light delay control module
Rear window shade control module
Rear window shade control module, driver's/ passenger's heated seat switch
Red
S1/
S5a
Steering column/ belt height control module, steering column adjustment control module, steering column adjustment switch
Window lockout switch, left/right heated door lock control module
Windshield wiper motor, windshield wiper/washer switch, wiper/washer intermittent relay

POWER MIRRORS

Automatic Day/Night Mirror Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Automatic Day/Night Mirror Wiring Diagram for Audi A8 Quattro 1999:

Automatic dimmer inside mirror
Driver's side heated mirror
Exterior lights system
Fuse 4 (st5) 10a
Fuse 6 (st3) 10a
Fuse panel (right front footwell)
G43 (above right kick panel)
Hot in run or start
Interior lights system
Multi-function transmission range switch (left side of transmission)
Nca
Passenger's side heated mirror
Red
Reverse

Power Mirrors Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Power Mirrors Wiring Diagram for Audi A8 Quattro 1999:

1998-99
Automatic day/night mirror circuit
Defogger system
Driver's side heated mirror
Fold- away (if equipped)
Fuse 2 (st5) 10a
Fuse panel (right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
Hot w/ load reduction relay energized
Mirror adjustment switch
Mirror fold-away function control module (if equipped) (right front footwell e-box relay panel)
Mirror position
Mirror select
Passenger's side heated mirror
Red
W/ mirror fold-away function
W/o mirror fold-away function

POWER SEATS

Driver"s Lumbar Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Driver"s Lumbar Wiring Diagram for Audi A8 Quattro 1999:

(1997, 1998, 1999, 2000)
Circuit breaker 30a
Driver seat lumbar support adjustment switch
Driver seat lumbar support curvature adjusting motor
Driver seat lumbar support height adjusting motor
G44 (above left kick panel)
Hot at all times
Lumbar curv- ature
Lumbar height
Memory systems
Right front footwell e-box auxiliary fuse & relay panel

Front Seat Heater Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Front Seat Heater Wiring Diagram for Audi A8 Quattro 1999:

10a
All times
Driver backrest heating element
Driver seat heating element
Driver side backrest facial heater
Driver side seatback facial heater
Drivers heated seat adjuster
Drivers heated seat temper- ature sensor
Fuse 10 (st5) 20a
Fuse 2 (st5) 10a
Fuse panel (at right front footwell)
G43 (above right kick panel)
G44 (above left kick panel)
Heated steering wheel circuit
Hot at
Hot w/ load reduction relay energized
Interior lights system
Nca
Passenger backrest heating element
Passenger heated seat temper- ature sensor
Passenger seat heating element
Passenger side backrest facial heater
Passenger side seatback facial heater
Passengers heated seat adjuster
Solid state

Heated Steering Wheel Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Heated Steering Wheel Wiring Diagram for Audi A8 Quattro 1999:

Drivers heated seat adjuster
Fuse 9 (st3) 10a
Fuse panel (at right front footwell)
G44 (above left kick panel)
Heated steering wheel
Hot w/ load reduction relay energized
Multi-function steering wheel control module
Steering wheel control unit
T2bv
T5b
W/ audio steering wheel controls
W/o audio steering wheel controls

Passenger Seat Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Passenger Seat Wiring Diagram for Audi A8 Quattro 1999:

(above left kick panel) g44
Back- rest
Circuit breaker 30a
Fore/ aft
Front height
Front passenger seat lumbar support adjustment switch
G44 (above left kick panel)
Head- rest
Hot at all times
Lumbar curv- ature
Lumbar height
Nca
Passenger backrest stop switch
Passenger seat adjustment switch
Passenger seat backrest adjusting motor
Passenger seat fore/aft adjusting motor
Passenger seat front height adjusting motor
Passenger seat headrest adjusting motor
Passenger seat lumbar support curvature adjusting motor
Passenger seat lumbar support height adjusting motor
Passenger seat rear height adjusting motor
Passengers belt height adjustment switch
Rear height
Red
Right front footwell e-box auxiliary fuse & relay panel
Right seat belt motor

Rear Lumbar Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Rear Lumbar Wiring Diagram for Audi A8 Quattro 1999:

Fuse 20a
G43 (above right kick panel)
Hot at all times
Left rear seat lumbar support curvature adjusting motor
Left rear seat lumbar support height adjusting motor
Lumbar curv- ature
Lumbar height
Rear left seat lumbar support adjustment switch
Rear right seat lumbar support adjustment switch
Relay & fuse panel
Right rear seat lumbar support curvature adjusting motor
Right rear seat lumbar support height adjusting motor

Rear Power Headrest Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Rear Power Headrest Wiring Diagram for Audi A8 Quattro 1999:

Fuse 2 (st5) 10a
Fuse 20a
Fuse panel (at right front footwell)
G43 (above right kick panel)
Hot at all times
Hot w/ load reduction relay energized
Interior lights system
Left rear head rest lower relay (on left rear seat back)
Left rear seat head rest adjustment motor
Left rear seat head rest adjustment switch
Rear head- rest adjustment switch
Relay & fuse panel
Right rear head rest lower relay (on right rear seat back)
Right rear seat head rest adjustment motor
Right rear seat head rest adjustment switch

Rear Seat Heater Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Rear Seat Heater Wiring Diagram for Audi A8 Quattro 1999:

All times
Fuse 2 (st5) 10a
Fuse 20a
Fuse panel (at right front footwell)
G43 (above right kick panel)
Hot at
Hot w/ load reduction relay energized
Interior lights system
Left rear "b" pillar microswitch
Left rear backrest heating element
Left rear heated seat regulating switch
Left rear heated seat switch
Left rear seat heating element
Left rear seat temper- ature sensor
Nca
Relay & fuse panel (in plenum chamber e-box)
Right rear
Right rear "b" pillar microswitch
Right rear backrest heating element
Right rear heated seat switch
Right rear seat heat heated seat switch
Right rear seat temper- ature sensor
Seat heating element
Solid state

POWER TOP/SUNROOF

Sunroof Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Sunroof Wiring Diagram for Audi A8 Quattro 1999:

Central locking/ alarm system/ interior light delay module (left side of luggage compt, near wheelwell)
Fuse 6 (st5) 20a
Fuse panel (right front footwell)
G43 (above right kick panel)
Hot at all times
Nca
Power sunroof control module (above interior light assembly, forward of sunroof)
Solid state
Sunroof motor
Sunroof regulator
T10o
T16
T2p
T5c

POWER WINDOWS

Power Windows Wiring Diagram (1 of 2) for Audi A8 Quattro 1999

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List of elements for Power Windows Wiring Diagram (1 of 2) for Audi A8 Quattro 1999:

All times
C.b. 37 30a
Central locking/ alarm system/ interior light delay control module (at left side of luggage compt)
Fuse 2 (st5) 10a
Fuse panel
G44 (above left kick panel)
Hot at
Hot in run
Left front window switch
Left window motor
Power sunroof control module
Right front footwell e-box auxiliary fuse & relay panel
T10o
T12
T16
Window motor

Power Windows Wiring Diagram (2 of 2) for Audi A8 Quattro 1999

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List of elements for Power Windows Wiring Diagram (2 of 2) for Audi A8 Quattro 1999:

(1997-99)
(2000-03)
2000-03
All times
C.b. 43 30a
Fuse 7 (st5) 15a
Fuse panel
G43 (above right kick panel)
G44 (above left kick panel)
Hot at
Interior lights system
Left rear door window motor
Left rear door window switch (center console)
Left rear door window switch (door)
Rear cigarette lighter
Right front door window switch
Right front door window switch (right door)
Right front footwell e-box auxiliary fuse & relay panel
Right rear door window motor
Right rear door window switch (center console)
Right rear door window switch (door)
Right window motor
Window lockout switch
Window m motor
Window motor

Rear Window Sun Shade Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Rear Window Sun Shade Wiring Diagram for Audi A8 Quattro 1999:

(1997-99)
(2000-03)
(below right side of rear parcel shelf)
10a
87a
87b
Fuse 10 (st5) 20a
Fuse 4 (st5) 10a
Fuse panel
G43 (above right kick panel)
Heated seats system (1998-03)
Hot at all times
Hot in run
Interior lights system
Nca
Rear window shade control module
Rear window shade motor
Rear window shade switch

RADIO

Radio Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Radio Wiring Diagram for Audi A8 Quattro 1999:

(if equipped)
(pin 1-2 & 5-8 not used)
(pin 1-4 & 7-8 not used)
20a
Amplifier
Cd changer unit
Central locking/ alarm system/ interior light delay module (at left side of luggage compt, near wheelwell)
Data link connector (rapid data transfer)
Fuse 1 (st3) 15a
Fuse 92
Fuse panel (at right front footwell)
G43 (above right kick panel)
G60 (near right taillight)
Hot at all times
Hot in start and run
Instrument cluster
Left front woofer/ left front midrange speaker
Left rear midrange speaker
Left rear woofer
Multi-function steering control module
Nca
Pnk
Power antenna system
Radio
Red
Relay & fuse panel (at right side of luggage compt)
Right front woofer/ right front midrange speaker
Right rear midrange speaker
Right rear woofer
T10u
T16
T16a
T26
T6f
T6g
T6h
T8a
T8b
Telephone speaker (if equipped)
Telephone transceiver (if equipped)
Wiper/washer intermitten relay (in left side of luggage compt)

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Shift Interlock Wiring Diagram for Audi A8 Quattro 1999:

Brake light switch
Central electric panel (right front footwell e-box)
Cruise control switch (if equipped)
Exterior lights system (backup)
Fuse 6 (st3) 10a
Fuse 9 (st2) 10a
Fuse panel (at right front footwell)
Fuse s113 15a
G43 (above right kick panel)
Hot at all times
Ignition switch
Multifunction transmission range switch (left side of transmission)
Off
Relay & fuse panel (right side of luggage compt)
Run
Shift lock solenoid (below center console)
Start
Transmission control module (tcm) (in plenum chamber e-box)

STARTING/CHARGING

Charging Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Charging Wiring Diagram for Audi A8 Quattro 1999:

(above left kick panel) g44
Battery
Connector tv1
Fuse 1 (st3) 15a
Fuse panel (right front footwell)
G51 (right side of luggage compt)
Generator
Generator warning light
Hot at all times
Hot in run or start
Ignition switch
Instrument cluster
Off
Run
Start
Starter
T26a
T6f

Starting Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Starting Wiring Diagram for Audi A8 Quattro 1999:

15a
50b
Battery
Central electric panel (in right front footwell e-box)
Central locking/ alarm system/ interior light delay module (left side of luggage compt, near wheelwell)
Connector tv1
G51 (right side of luggage compt)
Ignition switch
Off
Power distribution system
Red
S1/50z
S4/50z
S4/a
S4/b
S6/50a
Start
Starter
Starting interlock relay

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Supplemental Restraints Wiring Diagram for Audi A8 Quattro 1999:

Acc
Air bag control module (below center of dash)
Air bag malfunction indicator lamp (mil)
Air bag spiral spring/return spring w/slip ring
Central locking/ alarm system/ interior light delay control module (left side of luggage compt)
Computer data lines system
Data link connector t16a
Driver's side air bag igniter
Driver's side rear
Driver's side rear belt tensioner igniter
Driver's side side air bag crash sensor
Fuse 1 (st3) 15a
Fuse panel (at right front footwell)
G43 (above right kick panel)
Hot at all times
Hot in run and start
Ignition starter/ switch
Instrument cluster
Left front "a" pillar microswitch
Left seat belt tensioner igniter
Lock
Nca
Note: shorting bridges on air bag control module close when module connector is disconnected from harness. shorting bridges connect pins: 1-2, 3-4, 6-30, 10-11, 13-14, 16-17, 18-19, 22-23, 24-25
Passenger's side air bag igniter
Passenger's side airbag igniter 1
Passenger's side rear
Passenger's side rear belt tensioner igniter
Passenger's side seat occupied sensor (in bottom of passenger seat)
Passenger's side side air bag crash sensor
Rear driver's side, side airbag igniter
Rear passenger's side, side airbag igniter
Red
Right front "a" pillar microswitch
Right seat belt tensioner igniter
Run
Seat occupied sensor (in bottom of driver's side rear seat)
Seat occupied sensor (in bottom of passenger's side rear seat)
Solid state
Start
T16
T26a
T6f

TRANSMISSION

A/T Wiring Diagram, AWD for Audi A8 Quattro 1999

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List of elements for A/T Wiring Diagram, AWD for Audi A8 Quattro 1999:

(56-84 not used)
(above left kick panel)
(above right kick panel) g43
(below center console) shift lock solenoid
(left side of transmission) multifunction transmission range switch
+/-
Brake light switch
Central electric panel (right front footwell e-box)
Cruise control switch (if equipped)
Data link connector (below left side of dash)
Engine control module (in plenum chamber e-box)
Exterior lights system (backup)
Fuse 3 (st2) 5a
Fuse 6 (st3) 10a
Fuse 9 (st2) 10a
Fuse panel (at right front footwell)
Fuse s113 15a
G43 (above right kick panel)
G44
Hot at all times
Hot in park or head
Illum
Ind
Interior lights system
Kickdown switch (integral w/ accelerator cable)
Nca
Off
P/n
Pressure control valves
Red
Relay & fuse panel (right side of luggage compt)
Run
Solenoid valves
Start
T2af
T5f
T5g
Tiptronic switch
Transmission control module (tcm) (01l transmission) (in plenum chamber e-box)
Transmission fluid temperature sensor
Transmission output speed sensor (right side of transmission)
Transmission range selector lever display
Transmission speed sensor
Valve body (01l transmission)

A/T Wiring Diagram, FWD for Audi A8 Quattro 1999

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List of elements for A/T Wiring Diagram, FWD for Audi A8 Quattro 1999:

g43 (above right kick panel)
(56-84 not used)
(above left kick panel)
(above right kick panel) g43
(below center console) shift lock solenoid
(if equipped) abs control module
(left side of transmission) multifunction transmission range switch
+/-
Brake light switch
Central electric panel (right front footwell e-box)
Cruise control switch (if equipped)
Data link connector (below left side of dash)
Engine control module (in plenum chamber e-box)
Exterior lights system (backup)
Fuse 3 (st2) 5a
Fuse 6 (st3) 10a
Fuse 9 (st2) 10a
Fuse panel (at right front footwell)
Fuse s113 15a
G43 (above right kick panel)
G44
Hot at all times
Hot in park or head
Illum
Ind
Interior lights system
Kickdown switch (integral w/ accelerator cable)
Nca
Off
P/n
Pressure control valves
Red
Relay & fuse panel (right side of luggage compt)
Run
Solenoid valves
Start
T2af
T5f
T5g
Tiptronic switch
Transmission control module (tcm) (01v transmission) (in plenum chamber e-box)
Transmission fluid temperature sensor
Transmission output speed sensor (right side of transmission)
Transmission range selector lever display
Transmission speed sensor
Valve body (01v transmission)

TRUNK, TAILGATE, FUEL DOOR

Trunk Release Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Trunk Release Wiring Diagram for Audi A8 Quattro 1999:

(1997)
(1998-99)
15a
Central locking/ alarm system/ interior light delay control module (left side of luggage compartment, near wheelwell)
Deck lid central locking system motor
Fuse 3 (st5) 10a
Fuse panel
G60 (near right taillight)
Glove compartment lock contact switch
Hot at all times
Luggage compartment release switch
T16
T1o0

WIPER/WASHER

Wiper/Washer Wiring Diagram for Audi A8 Quattro 1999

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List of elements for Wiper/Washer Wiring Diagram for Audi A8 Quattro 1999:

(not used)
10a
Air conditioning system
Battery
Board computer
Central electric panel
Fuse 10 (st1) 25a
Fuse 10 (st2) 5a
Fuse panel
G43 (above right kick panel)
G44 (above left kick panel)
Headlight washer pump
Hot at all times
Hot in run
Ignition switch
Instrument cluster
Left washer nozzle heater
Light switch
Load reduction relay
Off
Red
Right washer nozzle heater
Run
S1/31
Sound system
Start
T26
T26b
Washer fluid level switch
Windshield washer pump
Windshield wiper intermittent regulator
Windshield wiper motor
Windshield wiper/ washer switch
Wiper/washer intermittent relay (on right front footwell e-box relay panel)