WI-XML
Audi A8
Page 1 of 35
Current Flow Diagram
No. 129 / 1
Edition 10.2007
Basic equipment
from September 2007
Notes:
For information concerning




Position of relays and fuses
Multi-pin connections
Control units and relays
Earth connections
→ List of Fitting Locations!
For information concerning

Fault Finding Programs
→ guided fault finding
WI-XML
Audi A8
Page 2 of 35
No. 129 / 2
Current Flow Diagram
Battery, energy management control unit, battery isolation igniter,
fuses
A
- Battery
B
- Starter
C
- Alternator
J234 - Airbag control unit
J644 - Energy management control unit
N253 - Battery isolation igniter
S131 - Fuse 1
S132 - Fuse 2
S133 - Fuse 3
SC12 - Fuse 12 on fuse holder C
SC13 - Fuse 13 on fuse holder C
SC15 - Fuse 15 on fuse holder C
SC38 - Fuse 38 on fuse holder C
T2a
- 2-pin connector, black, in front right engine compartment
T2f
- 2-pin connector, black, on alternator
T46b - 46-pin connector, black, CAN separating connector right
Z2
- Heated windscreen
- Positive connection (30), in main wiring harness
B272
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B299
B304
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*
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***
Current Flow Diagram
- Positive connection 3 (30), in main wiring harness
- Positive connection 8 (30), in main wiring harness
-
CAN bus (data wire)
In luggage compartment, rear right
models with petrol engines
models with diesel engines
No. 129 / 3
WI-XML
Page 3 of 35
Terminal 15 voltage supply relay, terminal 75 voltage supply relay
1
J329 - Terminal 15 voltage supply relay
J680 - Terminal 75 voltage supply relay 1
S110 - Levelling system fuse
S123 - ABS control unit fuse 1
SB19 - Fuse 19 on fuse holder B
SB20 - Fuse 20 on fuse holder B
- Positive connection 1 (15), in interior wiring harness
B163
B165
B273
B298
B302
B306
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B492
*
- Positive connection 2 (15), in interior wiring harness
- Positive connection (15), in main wiring harness
- Positive connection 2 (30), in main wiring harness
- Positive connection 6 (30), in main wiring harness
- Positive connection 10 (30), in main wiring harness
- Positive connection 3 (15), in interior wiring harness
- Relay and fuse carrier behind left dash panel
WI-XML
Audi A8
Page 4 of 35
Current Flow Diagram
No. 129 / 4
Steering column electronics control unit, steering column voltage
supply
J104 - ABS control unit with EDL
J527 - Steering column electronics control unit
SB9
- Fuse 9 on fuse holder B
SC9
- Fuse 9 on fuse holder C
SC20 - Fuse 20 on fuse holder C
T16a - 16-pin connector, on steering column electronics control unit
- Earth point, lower part of left A-pillar
44
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B346
B348
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- Earth connection 1, in main wiring harness
- Earth connection 4, in main wiring harness
- Connection 1 (75), in main wiring harness
- Connection 1 (75a), in main wiring harness
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Current Flow Diagram
No. 129 / 5
WI-XML
Page 5 of 35
Turn signal switch, intermittent wiper switch, horn plate, steering
angle sender, steering column electronics control unit
E2
- Turn signal switch
E5
- Headlight flasher switch
E22
- Intermittent wiper switch
G85
- Steering angle sender
H
- Horn plate
J527 - Steering column electronics control unit
T2g
- 2-pin connector, behind steering column switch trim (horn)
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WI-XML
Audi A8
Page 6 of 35
Current Flow Diagram
No. 129 / 6
Steering column electronics control unit, cruise control system
switch
E45
- Cruise control system switch
J527 - Steering column electronics control unit
J623 - Engine control unit
T16a - 16-pin connector, on steering column electronics control unit
T17c - 17-pin connector, brown, in electronics box in plenum
chamber
T46a - 46-pin connector, black, CAN separating connector left
•
- CAN bus (data wire)
*
Engine Current Flow Diagram
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Current Flow Diagram
No. 129 / 7
WI-XML
Page 7 of 35
Entry and start authorisation control unit, entry and start
authorisation switch, steering column lock control element, entry
and start authorisation button
E408 - Entry and start authorisation button
E415 - Entry and start authorisation switch
F189 - Tiptronic switch
J518 - Entry and start authorisation control unit
J540 - Electric park and handbrake control unit
J589 - Driver identification control unit
N360 - Steering column lock control element
T6r
- 6-pin connector, black, connector B, on entry and start
authorisation control unit
T8c
- 8-pin connector, black, in centre console on selector lever
console
T46b - 46-pin connector, black, CAN separating connector right
T81b - 81-pin connector, black, connector A, on entry and start
authorisation control unit
- Connection 3 in main wiring harness
B467
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- CAN bus (data wire)
- models with entry and start authorisation (Kessy)
- models with driver identification (Finger print)
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Audi A8
Page 8 of 35
Current Flow Diagram
No. 129 / 8
Onboard supply control unit, light switch
E1
- Light switch
E7
- Fog light switch
E18
- Rear fog light switch
J519 - Onboard supply control unit
K4
- Side light warning lamp
K13
- Rear fog light warning lamp
K17
- Fog light warning lamp
L9
- Light switch illumination bulb
T32a - 32-pin connector, connector C, on onboard supply control
unit
T46a - 46-pin connector, black, CAN separating connector left
•
- CAN bus (data wire)
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Current Flow Diagram
No. 129 / 9
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Page 9 of 35
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Onboard supply control unit, hazard warning lights button,
operating unit in front of centre console
E149 - Rear roller blind switch
E229 - Hazard warning lights button
E256 - TCS and ESP button
E266 - Parking aid button
E380 - Multimedia system operating unit
E461 - Operating unit in front of centre console
E462 - Open and close button for front display
E530 - Button for lane change assist
J104 - ABS control unit
J234 - Airbag control unit
J255 - Climatronic control unit
J446 - Parking aid control unit
J519 - Onboard supply control unit
J769 - Lane change assist control unit
K6
- Hazard warning light system warning lamp
K136 - Parking aid warning lamp
K145 - Front passenger side airbag deactivated warning lamp
K232 - Lane change assist warning lamp
L156 - Switch illumination bulb
T12v - 12-pin connector, black, on lane change assist control unit
T16b - 16-pin connector, black, on operating unit in front of centre
console
T32a - 32-pin connector, connector C, on onboard supply control
unit
- Positive connection 3 (15a), in main wiring harness
B279
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Audi A8
Page 10 of 35
No. 129 / 10
Current Flow Diagram
Onboard supply control unit, left side light bulb, front left turn
signal bulb, left dipped beam bulb, left main beam bulb, driver side
exterior mirror turn signal bulb
F189 - Tiptronic switch
J519 - Onboard supply control unit
L131 - Driver side exterior mirror turn signal bulb
M1
- Left side light bulb
M5
- Front left turn signal bulb
M29
- Left dipped beam bulb
M30
- Left main beam bulb
M33
- Front left side marker bulb
T4aw - 4-pin connector, black, in driver door
T8c
- 8-pin connector, black, in centre console on selector lever
console
T10a - 10-pin connector, black, on left of headlight
T10d - 10-pin connector, black, in front left engine compartment
T20a - 20-pin connector, black, left A-pillar
T23
- 23-pin connector, black, connector B, on onboard power
supply control unit
T32a - 32-pin connector, connector C, on onboard supply control
unit
- Earth point, lower part of left A-pillar
44
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205
375
388
B466
#
Audi A8
Current Flow Diagram
- Earth connection, in driver door wiring harness
- Earth connection 10, in main wiring harness
- Earth connection 23, in main wiring harness
- Connection 2 in main wiring harness
- only USA
No. 129 / 11
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Page 11 of 35
Onboard supply control unit, right side light bulb, front right turn
signal bulb, right dipped beam bulb, right main beam bulb, front
passenger side exterior mirror turn signal bulb
J519 - Onboard supply control unit
L132 - Front passenger side exterior mirror turn signal bulb
M3
- Right side light bulb
M7
- Front right turn signal bulb
M31
- Right dipped beam bulb
M32
- Right main beam bulb
M34
- Front right side marker bulb
T4ax - 4-pin connector, black, in front passenger door
T10b - 10-pin connector, black, on right of headlight
T10d - 10-pin connector, black, in front left engine compartment
T20b - 20-pin connector, black, right A-pillar
T23
- 23-pin connector, black, connector B, on onboard power
supply control unit
T32a - 32-pin connector, connector C, on onboard supply control
unit
- Earth point, lower part of right A-pillar
43
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386
387
#
- Earth connection, in door wiring harness, front passenger
side
- Earth connection 21, in main wiring harness
- Earth connection 22, in main wiring harness
- only USA
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Audi A8
Page 12 of 35
Current Flow Diagram
No. 129 / 12
Onboard supply control unit, left and right fog light bulb, treble
tone horn, bass tone horn
H2
- Treble tone horn
H7
- Bass tone horn
J4
- Dual tone horn relay
J519 - Onboard supply control unit
L22
- Left fog light bulb
L23
- Right fog light bulb
T10d - 10-pin connector, black, in front left engine compartment
T23
- 23-pin connector, black, connector B, on onboard power
supply control unit
T32a - 32-pin connector, connector C, on onboard supply control
unit
- Earth connection, in front fog light wiring harness
203
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- Relay and fuse carrier behind left dash panel
- only USA
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Current Flow Diagram
No. 129 / 13
WI-XML
Page 13 of 35
Voltage supply onboard power supply control unit, fuses
J519 - Onboard supply control unit
SB5
- Fuse 5 on fuse holder B
SB6
- Fuse 6 on fuse holder B
SB7
- Fuse 7 on fuse holder B
SB15 - Fuse 15 on fuse holder B
SB31 - Fuse 31 on fuse holder B
SB38 - Fuse 38 on fuse holder B
SB40 - Fuse 40 on fuse holder B
T10p - 10-pin connector, black, connector A, on onboard power
supply control unit
T23
- 23-pin connector, black, connector B, on onboard power
supply control unit
T32a - 32-pin connector, connector C, on onboard supply control
unit
*
- models without light equipment
**
- models with light equipment
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WI-XML
Audi A8
Page 14 of 35
No. 129 / 14
Current Flow Diagram
Convenience system central control unit
J393 - Convenience system central control unit
J529 - Anti-theft and tilt system control unit
J605 - Rear lid control unit
SF5
- Fuse 5 on fuse holder F
SF6
- Fuse 6 on fuse holder F
SF7
- Fuse 7 on fuse holder F
SF8
- Fuse 8 on fuse holder F
T10q - 10-pin connector, black, connector C, on convenience system
central control unit
T32b - 32-pin connector, connector B, on convenience system
central control unit
T46b - 46-pin connector, black, CAN separating connector right
V254 - Rear lid electric release motor
- Positive connection 2 (30a), in main wiring harness
B316
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- CAN bus (data wire)
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Current Flow Diagram
No. 129 / 15
WI-XML
Page 15 of 35
Convenience system central control unit, left tail light bulb, rear
left turn signal bulb, left brake light bulb, left reversing light bulb,
rear left fog light bulb
J393 - Convenience system central control unit
J690 - Left tail light control unit
J692 - Tail light control unit for lights on left in rear lid
L46
- Rear left fog light bulb
M4
- Left tail light bulb
M6
- Rear left turn signal bulb
M9
- Left brake light bulb
M16
- Left reversing light bulb
M56
- Left brake and turn signal bulb
M84
- Bulb 2 for left brake and turn signal
M86
- Left brake light bulb 2
T6f
- 6-pin connector, black, connector 1, on left rear fog light
T8i
- 8-pin connector, black, connector 2, on left rear fog light, rear
lid
T15c - 15-pin connector, brown, connector A, on convenience
system central control unit
T32b - 32-pin connector, connector B, on convenience system
central control unit
- Connection 8 in main wiring harness
B472
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B630
*
- Positive connection (left turn signal bulb) in main wiring
harness
- only USA
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Audi A8
Page 16 of 35
No. 129 / 16
Current Flow Diagram
Convenience system central control unit, right tail light bulb, right
brake light bulb, rear right turn signal bulb, right reversing light
bulb, rear right fog light bulb
J393 - Convenience system central control unit
J691 - Right tail light control unit
J693 - Tail light control unit for lights on right in rear lid
L47
- Rear right fog light bulb
M2
- Right tail light bulb
M8
- Rear right turn signal bulb
M10
- Right brake light bulb
M17
- Right reversing light bulb
M57
- Right brake and turn signal bulb
M85
- Bulb 2 for right brake light and turn signal
M87
- Right brake light bulb 2
T6h
- 6-pin connector, black, connector 1, on right rear fog light
T8k
- 8-pin connector, black, connector 2, on right rear fog light,
rear lid
T15c - 15-pin connector, brown, connector A, on convenience
system central control unit
T32b - 32-pin connector, connector B, on convenience system
central control unit
- Earth point, on right in luggage compartment
51
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376
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611
B472
B631
*
Audi A8
Current Flow Diagram
- Earth connection 11, in main wiring harness
- Earth connection 28, in main wiring harness
- Earth connection, on fuel tank filler neck
- Connection 8 in main wiring harness
- Positive connection (right turn signal bulb) in main wiring
harness
- only USA
No. 129 / 17
WI-XML
Page 17 of 35
Convenience system central control unit, number plate light,
heated rear window, release button for rear lid lock cylinder
C18
- Window aerial suppression filter
F248 - Release button for rear lid lock cylinder
J9
- Heated rear window relay
J393 - Convenience system central control unit
S41
- Heated rear window fuse
T15c - 15-pin connector, brown, connector A, on convenience
system central control unit
T32b - 32-pin connector, connector B, on convenience system
central control unit
X
- Number plate light
X4
- Number plate left light
X5
- Number plate right light
Z1
- Heated rear window
- Earth connection 11, in main wiring harness
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- Earth point 1, on left near rear window
- not Japan and USA
- only Japan and USA
- Relay and fuse carrier right in luggage compartment
WI-XML
Audi A8
Page 18 of 35
No. 129 / 18
Current Flow Diagram
Convenience system central control unit, brake light switch, high
level brake light bulb
F
- Brake light switch
F47
- Brake pedal switch
J104 - ABS control unit
J234 - Airbag control unit
J393 - Convenience system central control unit
J623 - Engine control unit
M25
- High level brake light bulb
SB22 - Fuse 22 on fuse holder B
T2d
- 2-pin connector, black, high level brake light right of D-pillar
T17c - 17-pin connector, brown, in electronics box in plenum
chamber
T32b - 32-pin connector, connector B, on convenience system
central control unit
- Earth connection 29, in main wiring harness
394
654
B335
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B336
B337
*
#
Current Flow Diagram
- Earth point, right D-pillar
- Connection 1 (54), in main wiring harness
- Connection 2 (54), in main wiring harness
- Connection 3 (54), in main wiring harness
Engine Current Flow Diagram
- Relay carrier electronics box in plenum chamber
No. 129 / 19
WI-XML
Page 19 of 35
Convenience system central control unit, luggage compartment
light, rear lid light, rear footwell illumination
E406 - Button to close rear lid in luggage compartment
J393 - Convenience system central control unit
L106 - Rear left footwell illumination bulb
L107 - Rear right footwell illumination bulb
T17h - 17-pin connector, grey, under driver seat
T17i
- 17-pin connector, grey, under front passenger seat
T32b - 32-pin connector, connector B, on convenience system
central control unit
W18 - Luggage compartment light on left
W35 - Right luggage compartment light
W51 - Rear lid light
- Earth connection 6, in main wiring harness
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- Earth connection 13, in main wiring harness
653
- Earth point, left D-pillar
675
- Earth point 2, on right in luggage compartment
B476
M43
M53
- Connection 12 in main wiring harness
- Connection 3, in driver seat wiring harness
- Connection 3, in front passenger seat wiring harness
WI-XML
Audi A8
Page 20 of 35
No. 129 / 20
Current Flow Diagram
Wiper motor control unit, windscreen wiper motor, washer pump,
diagnostic connector, rain and light detector sensor
G397 - Rain and light detector sensor
J217 - Automatic gearbox control unit
J400 - Wiper motor control unit
J623 - Engine control unit
SB8
- Fuse 8 on fuse holder B
SB24 - Fuse 24 on fuse holder B
SB25 - Fuse 25 on fuse holder B
SC11 - Fuse 11 on fuse holder C
T16
- 16-pin connector, black, diagnostic connector
T16c - 16-pin connector, black, on automatic gearbox control
unit
T17a - 17-pin connector, black, in electronics box in plenum
chamber
V
- Windscreen wiper motor
V5
- Washer pump
- Earth point, under driver seat
34
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B305
B486
D166
•
Current Flow Diagram
- Earth connection 2, in main wiring harness
- Positive connection 9 (30), in main wiring harness
- Connection 22 in main wiring harness
- Connection (K-diagnosis wiring), in engine compartment
wiring harness
- CAN bus (data wire)
No. 129 / 21
WI-XML
Page 21 of 35
Onboard supply control unit 2, servotronic
J520 - Onboard supply control unit 2
N119 - Servotronic solenoid valve
SC24 - Fuse 24 on fuse holder C
T46b - 46-pin connector, black, CAN separating connector right
- Earth point, under front passenger seat
35
368
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- Earth connection 3, in main wiring harness
- CAN bus (data wire)
WI-XML
Audi A8
Page 22 of 35
No. 129 / 22
Current Flow Diagram
Onboard supply control unit 2, headlight washer system pump,
left and right headlight washer system pop-up washer jet motor,
headlight washer system relay, washer jet heater element
J39
- Headlight washer system relay
J520 - Onboard supply control unit 2
SB18 - Fuse 18 on fuse holder B
SC43 - Fuse 43 on fuse holder C
T10d - 10-pin connector, black, in front left engine compartment
V11
- Headlight washer system pump
V248 - Left headlight washer system pop-up washer jet motor
V249 - Right headlight washer system pop-up washer jet motor
Z20
- Left washer jet heater element
Z21
- Right washer jet heater element
- Earth point, lower part of left A-pillar
44
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388
*
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Audi A8
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- Earth connection 10, in main wiring harness
- Earth connection 23, in main wiring harness
- Relay carrier, in front right footwell
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brown
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orange
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Current Flow Diagram
No. 129 / 23
WI-XML
Page 23 of 35
Control unit in dash panel insert, front brake pad wear sender, oil
pressure switch
F1
- Oil pressure switch
G34
- Front left brake pad wear sender
G35
- Front right brake pad wear sender
J285 - Control unit in dash panel insert
K3
- Oil pressure warning lamp
K32
- Brake pad warning lamp
T17a - 17-pin connector, black, in electronics box in plenum
chamber
T32
- 32-pin connector, blue, on dash panel insert
Y24
- Display in dash panel insert
- Positive connection 4 (30a), in main wiring harness
B318
*
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purple
yellow
orange
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- 6.0 l Motor, engine code BHT only
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Audi A8
Page 24 of 35
No. 129 / 24
Current Flow Diagram
Control unit in dash panel insert, oil level and oil temperature
sender, brake fluid level warning contact, windscreen washer fluid
level sender, coolant shortage indicator switch, ambient
temperature sensor
F34
- Brake fluid level warning contact
F66
- Coolant shortage indicator switch
G17
- Ambient temperature sensor
G33
- Windscreen washer fluid level sender
G106 - Ambient temperature indicator
G266 - Oil level and oil temperature sender
J285 - Control unit in dash panel insert
K28
- Coolant temperature and coolant shortage warning lamp
K106 - Washer fluid low warning lamp
K118 - Brake system warning lamp
T17a - 17-pin connector, black, in electronics box in plenum
chamber
T17d - 17-pin connector, blue, in electronics box in plenum
chamber
T32
- 32-pin connector, blue, on dash panel insert
Y24
- Display in dash panel insert
- Earth point, lower part of right A-pillar
43
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85
387
401
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Current Flow Diagram
- Earth connection 1, in engine compartment wiring harness
- Earth connection 22, in main wiring harness
- Earth connection (sender earth), in interior wiring harness
- output sender earth
No. 129 / 25
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Page 25 of 35
Control unit in dash panel insert, radio controlled clock, control
unit for electromechanical parking brake, radio controlled clock
receiver, data bus diagnostic interface
J285 - Control unit in dash panel insert
J489 - Radio controlled clock receiver
J533 - Data bus diagnostic interface
J540 - Electric park and handbrake control unit
K213 - Electric parking brake and handbrake warning lamp
K214 - Electric parking brake and handbrake fault warning lamp
SB10 - Fuse 10 on fuse holder B
T17o - 17-pin connector, black, in luggage compartment
T32
- 32-pin connector, blue, on dash panel insert
Y8
- Radio controlled clock
Y24
- Display in dash panel insert
- Earth point, lower part of right A-pillar
43
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385
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- Earth connection 5, in main wiring harness
- Earth connection 20, in main wiring harness
- CAN bus (data wire)
- Wake Up wire (exciter wire)
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Audi A8
Page 26 of 35
No. 129 / 26
Current Flow Diagram
Control unit in dash panel insert, data bus diagnostic interface,
front information display and operating unit control unit, storage
compartment illumination bulb, cup holder illumination
J285 - Control unit in dash panel insert
J428 - Adaptive cruise control unit
J523 - Front information display and operating unit control unit
J533
L120
L121
SB29
T32
T46b
Y24
43
384
B108
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B109
B340
B341
B509
•
*
Current Flow Diagram
-
Data bus diagnostic interface
Storage compartment illumination bulb
Cup holder illumination bulb
Fuse 29 on fuse holder B
32-pin connector, blue, on dash panel insert
46-pin connector, black, CAN separating connector right
Display in dash panel insert
Earth point, lower part of right A-pillar
- Earth connection 19, in main wiring harness
- Connection 1 (CAN bus extended high) in main wiring
harness
- Connection 1 (CAN bus extended low) in main wiring harness
- Connection 1 (58s), in main wiring harness
- Connection 2 (58s), in main wiring harness
- Connection 3 (diagnosis), in main wiring harness (ring brake
diagnosis)
- CAN bus (data wire)
- models with adaptive cruise only
No. 129 / 27
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Page 27 of 35
Control unit in dash panel insert, fuel gauge sender, fuel system
pressurisation pump, fuel pump, fuel gauge
G
- Fuel gauge sender
G1
- Fuel gauge
G6
- Fuel system pressurisation pump
G23
- Fuel pump
G169 - Fuel gauge sender 2
G237 - Fuel gauge sender 3
G393 - Fuel gauge sender 4
J285 - Control unit in dash panel insert
T4a
- 4-pin connector, under right cover on vehicle floor
T6e
- 6-pin connector, under right cover on vehicle floor
T32
- 32-pin connector, blue, on dash panel insert
Y24
- Display in dash panel insert
- Earth connection (fuel gauge sender), in main wiring harness
361
390
675
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- Earth connection 25, in main wiring harness
- Earth point 2, on right in luggage compartment
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Audi A8
Page 28 of 35
Current Flow Diagram
No. 129 / 28
Fuel pump relay, electric fuel pump 2 relay
J17
- Fuel pump relay
J49
- Electric fuel pump 2 relay
J623 - Engine control unit
SC28 - Fuse 28 on fuse holder C
SC29 - Fuse 29 on fuse holder C
SC31 - Fuse 31 on fuse holder C
SF2
- Fuse 2 on fuse holder F
T17a - 17-pin connector, black, in electronics box in plenum
chamber
T17c - 17-pin connector, brown, in electronics box in plenum
chamber
T17e - 17-pin connector, red, in electronics box in plenum chamber
T81
- 81-pin connector, black, on engine control unit
- Positive connection 1 (87), in interior wiring harness
B146
B303
D95
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*
#
##
Current Flow Diagram
- Positive connection 7 (30), in main wiring harness
- Connection (injectors), in engine compartment wiring harness
- models with petrol engines
- Relay in front right footwell
- Relay and fuse carrier right in luggage compartment
No. 129 / 29
WI-XML
Page 29 of 35
Roof electronics control unit, illuminated vanity mirror, interior
monitor send and receive module 1, automatic anti-dazzle interior
mirror, light sensor, humidity sender, interior light switch
E317 - Interior light switch
F147 - Driver vanity mirror contact switch
F148 - Front passenger vanity mirror contact switch
G303 - Interior monitor send and receive module 1
G355 - Humidity sender
G399 - Light detector sensor
J528 - Roof electronics control unit
T4u
- 4-pin connector, black, near front interior light, for sunroof
T8f
- 8-pin connector, black, near front interior light
T26a - 26-pin connector, on front roof console
T46b - 46-pin connector, black, CAN separating connector right
V1
- Sliding sunroof motor
W14 - Front passenger side illuminated vanity mirror
W20 - Driver side illuminated vanity mirror
Y7
- Automatic anti-dazzle interior mirror
- Earth point, under front passenger seat
35
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B479
•
*
- Earth connection 27, in main wiring harness
- Connection 15 in main wiring harness
- CAN bus (data wire)
- models with sunroof
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Audi A8
Page 30 of 35
Current Flow Diagram
No. 129 / 30
Roof electronics control unit, interior light, front interior light
button, reading light button
E326 - Front interior light button
E457 - Driver side reading light button
E458 - Front passenger side reading light button
J528 - Roof electronics control unit
T26a - 26-pin connector, on front roof console
W13 - Front passenger side reading light
W16 - Left interior light
W17 - Right interior light
W19 - Driver side reading light
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Audi A8
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Current Flow Diagram
No. 129 / 31
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Page 31 of 35
Roof electronics control unit, rear operating unit for roof module,
rear switch for rear roller blind
E383 - Rear left roller blind button
E384 - Rear right roller blind button
E385 - Rear switch for rear roller blind
E467 - Rear operating unit for roof module
J528 - Roof electronics control unit
T26a - 26-pin connector, on front roof console
T26b - 26-pin connector, on rear roof console
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Audi A8
Page 32 of 35
Current Flow Diagram
No. 129 / 32
Rear operating unit for roof module, rear reading light, rear interior
light, rear reading light switch
E327 - Rear interior light button
E454 - Rear left reading light switch
E455 - Rear right reading light switch
E467 - Rear operating unit for roof module
T26b - 26-pin connector, on rear roof console
W11 - Rear left reading light
W12 - Rear right reading light
W47 - Rear left interior light
W48 - Rear right interior light
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Current Flow Diagram
No. 129 / 33
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Page 33 of 35
Rear operating unit for roof module, rear illuminated vanity mirror,
glove compartment light, left and right footwell light
E26
- Glove compartment light switch
E467 - Rear operating unit for roof module
T8b
- 8-pin connector, black, behind right dash panel
T26b - 26-pin connector, on rear roof console
W6
- Glove compartment light
W9
- Left footwell light
W10 - Right footwell light
W49 - Rear left illuminated vanity mirror
W50 - Rear right illuminated vanity mirror
- Earth connection 1, in dash panel wiring harness (glove box)
81
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- models without light equipment
- models with light equipment
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Audi A8
Page 34 of 35
Current Flow Diagram
No. 129 / 34
Illuminated centre armrest, centre console rear storage
compartment illumination bulb, 12 V socket
L157 - Illuminated centre armrest
L159 - Centre console rear storage compartment illumination bulb
SD8
- Fuse 8 on fuse holder D
SD11 - Fuse 11 on fuse holder D
T2aa - 2-pin connector, rear bellow the rear footwell vent
T2ab - 2-pin connector, rear bellow the rear footwell vent
U5
- 12 V socket
- Earth connection 8, in main wiring harness
373
391
606
- Earth point, under the centre console near gear stick
676
- Earth point 2, on left in luggage compartment
*
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Audi A8
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- Earth connection 26, in main wiring harness
- below shelf, left
- below shelf, right
- Screw connection, on rear left fuse holder
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Current Flow Diagram
No. 129 / 35
WI-XML
Page 35 of 35
Cigarette lighter, rear cigarette lighter
L28
- Cigarette lighter illumination bulb
L159 - Centre console rear storage compartment illumination bulb
SC36 - Fuse 36 on fuse holder C
SC37 - Fuse 37 on fuse holder C
U1
- Cigarette lighter
U9
- Rear cigarette lighter
U18
- 12 V socket 2
U19
- 12 V socket 3
- Earth connection 7, in main wiring harness
372
610
*
**
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- Earth point (audio), under centre console, front
- centre console, long version
- in left storage compartment
- in right storage compartment
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