Audi A8 Current Flow Diagram No.

1/1

Basic equipment
From model year 2003

Fuse box, dash panel, left

8 12 16 20 Fuse colours
5 9 13 17 21
1 3 6 10 14 18 22 30 A - green
2 4 7 11 15 19 23
25 A - white
24 31 38 Res
25 32 39 Res
20 A - yellow
26 33 40 Res 15 A - blue
27 34 41 Res
28 35 42 Res
10 A - red
29 36 43 7.5 A - brown
30 37 44
5 A - beige
A97--0119 1 A - black

SB - Fuses in fuse box, dash panel, left

SC - Fuses in fuse box, dash panel, right
SD - Fuses in fuse box, luggage compartment, left
SF - Fuses in fuse box, luggage compartment, right

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Audi A8 Current Flow Diagram No. 1/2
Fuse box, dash panel, right

A97--0407

Relay and fuse carrier, behind dash panel, left

Position of relays
2 - Dual tone horn relay (J4)
3 - Terminal 15 voltage supply relay (J329)
4 - Washer fluid heater relay (J711)
6 - Terminal 75 voltage supply relay -1- (J680)

A97--0403

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Audi A8 Current Flow Diagram No. 1/3
Relay and fuse carrier, luggage compartment, right

A D Position of relays
BC
1 - Heated rear window relay (J9)

A97--0409

Relay carrier, in footwell, front right

F Position of relays
E 5 - Headlight washer system relay (J39)

A
B C D

A97--0405

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Audi A8 Current Flow Diagram No. 1/4
Earth connections

35 - Earth point, under front passenger’s seat

43 - Earth point, lower part of right A pillar

44 - Earth point, lower part of left A pillar

366 - Earth connection -1-, in main wiring harness

368 - Earth connection -3-, in main wiring harness

369 - Earth connection -4-, in main wiring harness

372 - Earth connection -7-, in main wiring harness

373 - Earth connection -8-, in main wiring harness

375 - Earth connection -10-, in main wiring harness

383 - Earth connection -18-, in main wiring harness

606 - Earth point, under centre console, near gear

stick
610 - Earth point (audio), below centre console, front

654 - Earth point, right D pillar

ws = white
sw = black
ro = red
br = brown
4,0 2,5 4,0 2,5 4,0 4,0 4,0 gn = green
br br br br br br br bl = blue
gr = grey
li = purple
43 366 44 369 35 368 610 372 606 373 44 375 654 383 ge = yellow
or = orange
1 2 3 4 5 6 7 8 9 10 11 12 13 14
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Audi A8 Current Flow Diagram No. 1/5
Earth connections

34 - Earth point, under driver’s seat

43 - Earth point, lower part of right A pillar

50 - Earth point, luggage compartment, left

51 - Earth point, luggage compartment, right

367 - Earth connection -2-, in main wiring harness

370 - Earth connection -5-, in main wiring harness

371 - Earth connection -6-, in main wiring harness

377 - Earth connection -12-, in main wiring harness

378 - Earth connection -13-, in main wiring harness

382 - Earth connection -17-, in main wiring harness

611 - Earth connection, on fuel tank filler neck

653 - Earth point, left D pillar

676 - Earth point 2, in luggage compartment, left

ws = white
sw = black
ro = red
br = brown
4,0 6,0 2,5 4,0 1,0 1,5 4,0 gn = green
br br br br br br br bl = blue
gr = grey
li = purple
34 367 43 370 676 371 51 378 50 377 611 378 653 382 ge = yellow
or = orange
15 16 17 18 19 20 21 22 23 24 25 26 27 28
97-55644

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Audi A8 Current Flow Diagram No. 1/6
Battery, battery monitor control unit, battery cut-off
relay, terminal 15 voltage supply relay

A - Battery
B - Starter
C - Alternator
J234 - Airbag control unit
J329 - Terminal 15 voltage supply relay
167 51 253 J644 - Energy management control unit
B303
4,0 6,0 10,0 4,0 6,0 4,0 10,0 12,0
J655 - Battery cut-off relay
ro ro sw/ge ro ro ro sw/ge ro S131 - Fuse 1, 110 A, in luggage compartment, rear
right
12 13 15 282 269 464
S132 - Fuse 2, 60 A, in luggage compartment, rear
SC12 SC13 SC15 right
5A 10A 5A
12a 13a 15a B302 S133 - Fuse 3, 150 A, in luggage compartment, rear
164 95
169 right
Z2 SC12 - Fuse -12- on fuse box
0,35 1,0 10,0 16,0 2,5 6,0 0,5 4,0
ro/gn ro/ge sw ro bl ro
ro ro SC13 - Fuse -13- on fuse box
349 379 1A 2A 3A ✱
B298 SC15 - Fuse -15- on fuse box
4/85 1/30
T46b - 46-pin connector, black, CAN separating
S131 S132 S133 3
connector, right
110A 60A 150A
J329
5 4 3/86 2/87 Z2 - Heated windscreen
35,0 0,5 0,5 4,0
sw ro ro sw 379 - Earth connection -14-, in main wiring harness
+
53
B165 - Positive (+) connection -2- (15), in interior wiring
harness
A B273 - Positive (+) connection (15), in main wiring
B273 B273
harness
T46b T46b - J234 J234 B298 - Positive (+) connection -2- (30), in main wiring
/15H /15L 370 48
76 4 harness
0,35
• 0,35
• 0,35 0,5 50,0 50,0 0,5 0,5 0,5 0,5 1,0 4,0 B302 - Positive (+) connection -6- (30), in main wiring
or/gn or/br ro/gn ro/ws sw sw ws ge sw sw sw sw harness
B303 - Positive (+) connection -7- (30), in main wiring
CAN-H CAN-L
B-- A
harness
9 10 14 11 3 4 1/15 B165

J655 ws = white • - CAN bus (data wire)

J644 8 B 2/31 sw = black ✱ - In luggage compartment, rear right
ro = red
br = brown
0,5 80,0 0,5 0,5 0,35 0,35 gn = green
sw/ge sw br/ge sw sw sw
bl = blue
gr = grey
53
B 375 457 180 li = purple
C 379 ge = yellow
or = orange
29 30 31 32 33 34 35 36 37 38 39 40 41 42
97-55645

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Audi A8 Current Flow Diagram No. 1/7
Steering column electronics control unit, steering
column voltage supply, terminal 75 voltage supply
relay -1-

C - Alternator
J104 - ABS with EDL control unit
J527 - Steering column electronics control unit
J680 - Terminal 75 voltage supply relay -1-
96 SB4 - Fuse -4- on fuse box
B346 4,0 0,5 SB9 - Fuse -9- on fuse box
sw/ge bl/gn
SC9 - Fuse -9- on fuse box
2/87 4/85
SC20 - Fuse -20- on fuse box
6
T2a - 2-pin connector, black, in engine compartment,
J680 front right
89 41 1/30 3/86
T2f - 2-pin connector, black, on alternator
1,0 1,0 0,5 1,0 0,5 2,5 4,0 0,5 T16a - 16-pin connector, on steering column
sw sw/gn sw/ge sw sw/ge sw/ge ro ro
electronics control unit
291 294 40 38 T17f - 17-pin connector, connector A, relay carrier,
footwell, driver’s side
4 9 9 20 J527
SB4 SB9 SC9 SC20 369 - Earth connection -4-, in main wiring harness
10A 10A 5A 5A
4a 9a 9a 20a T16a/12 T16a/13 T16a/2 T16a/1
15 15 30 31
CAN B273 - Positive (+) connection (15), in main wiring
harness
1,0 0,5 1,0 0,5 0,35 0,35 1,0 1,0
sw/li sw/ge sw/bl sw/ws sw/gn sw ro/ge br B346 - Connection -1- (75), in main wiring harness

127 23 112
B273 J104 B348 - Connection -1- (75a), in main wiring harness
B273 B348 T17f T17f/7 T17f/16 T17f
/8 /15

32

0,35 0,35 1,0 0,5 0,35 0,5 1,0 1,0

sw sw sw sw sw/ge sw/ge ro/ge br

101 313 263 162

T2a/1
ws = white
sw = black
ro = red
br = brown
1,5 gn = green
bl bl = blue
D+ gr = grey
T2f/1
li = purple
C 369 ge = yellow
or = orange
43 44 45 46 47 48 49 50 51 52 53 54 55 56
97-55646

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Audi A8 Current Flow Diagram No. 1/8
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
E2 E5 G85 trim (horn)

Blinken Fernlicht 31 U1 LS1 LS2 LS3 LS4 LS5 LS6 LS7 31

31 Horn Wischer Wischer Wascher Bordcomputer 31

Front Intervall J527

T2g/1 T2g/2

E22

H ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
57 58 59 60 61 62 63 64 65 66 67 68 69 70
97-55647

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Audi A8 Current Flow Diagram No. 1/9
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,
plenum chamber
T17f - 17-pin connector, connector A, relay carrier,
E45 footwell, driver’s side
T46a - 46-pin connector, black, CAN separating
connector, left

• - CAN bus (data wire)

Soft aus/
SET Resume GRA Distance 15 gerastet aus 31

T16a/5 T16a/8 T16a/9 T16a/10 T16a/11

GRA J527 CAN-L CAN-H CAN-H CAN-L

0,35 0,35 • 0,35 • 0,35 • 0,35 •

sw/ws or/br or/gn or/sw or/br

T17f/6 T17f/3 T17f/2 T17f/4 T17f/5

0,22 0,35 0,35 0,35 0,35

sw/ws or/br or/gn or/sw or/br

T17c/14 T46a/10L T46a/10H T46a/2H T46a/2L

ws = white
sw = black
ro = red
0,35 br = brown
sw/ws gn = green
bl = blue
38 gr = grey
J623 li = purple
ge = yellow
or = orange
71 72 73 74 75 76 77 78 79 80 81 82 83 84
97-55648

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Audi A8 Current Flow Diagram No. 1/10
Entry and start authorisation control unit, entry and
start authorisation switch, steering column lock
control element, engine Start/Stop button

E408 -
Engine Start/Stop button
E415 -
Entry and start authorisation switch
J518 -
Entry and start authorisation control unit
J589 -
Driver identification control unit
N360 -
Steering column lock control element
T17f -
17-pin connector, connector A, relay carrier,
footwell, driver’s side
E415 T46b - 46-pin connector, black, CAN separating
connector, right
5/S1 1/S2 7/S3 11/S4 10/S5 6/S6 9/12V 3/31 2/AZS 12 8 4/SCLK
Data 1 Data 2
373 - Earth connection -8-, in main wiring harness

0,35 0,35 0,35 0,35 0,35 0,35 0,35 0,35 0,35 0,35 0,35 0,35
gn/ws gn/bl gn gn/ws gn/li gn/ro gn/gr gr/li gr/ro gn/br gn/sw gr/ws B467 - Connection -3-, in main wiring harness

A53 A55 A35 A37 A57 A33 A19 B5 B4 A52 A41 A40
• - CAN bus (data wire)
✱ - Models with entry and start authorisation
J518 (Kessy)
A16 B1 B2 B3 A31 A50 A56 A36 A58 A59 A34 ✱✱ - Models with driver identification (fingerprint)

✱ ✱ ✱ ✱
0,5 0,5 0,5 1,0 0,35 0,35 0,35 0,35 0,5 0,5 0,35
li/bl li ro/ge sw/gn bl/ws bl/ro bl/ge bl/li bl bl/gn ro/sw

41 53 227
B467

T17f T17f T17f T46b T46b

/9 /10 /11 /20H /20L
343
✱✱ ✱✱
0,5 0,5 0,5 1,0 0,5 0,35 • 0,35 • 0,35
✱
li/bl li ro/ge sw/gn sw/gn or/gn or/br gr/bl

46 234
Data Supply GND CAN-H CAN-L
1 2 3 3 4 5 6 11 12 7/58s
✱✱
START STOP J589 ws = white
N360 sw = black
1/30 2/31 ro = red
E408
br = brown
✱✱ ✱ gn = green
0,5 0,35
ro/ge br bl = blue
gr = grey
166 li = purple
373 ge = yellow
or = orange
85 86 87 88 89 90 91 92 93 94 95 96 97 98
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Audi A8 Current Flow Diagram No. 1/11
Onboard power supply control unit, lighting
switch, hazard warning lights button, operating
unit in front of centre console

E1 - Lighting switch
E7 - Fog light switch
E18 - Rear fog light switch
E149 - Rear roller blind switch
E229 - Hazard warning lights button
E256 - TCS/ESP button
E266 - Parking aid button
J519
E380 - Multimedia operating unit
E461 - Operating unit in front of centre console
C11 C8 C14 C12 C7 C15 C9 C20 C31 E462 - Open/close button for front display
CAN-L CAN-H
J104 - ABS with EDL control unit
0,35 0,35 0,35 • 0,35 0,35 0,35 • 0,35 0,35 0,35
J234 - Airbag control unit
gn/ge bl/sw or/br gr/gn gr or/gn bl/ws gn/ws ge/ws J255 - Climatronic control unit
J446 - Parking aid control unit
T46a T46a 257
J519 - Onboard power supply control unit
/22L /22H
K4 - Side light warning lamp
K6 - Hazard warning light system warning lamp
J255 J446 J446 E380 J234 J104
C24 A4 A13 10 70 27 K13 - Rear fog light warning lamp
43 337
K17 - Fog light warning lamp
0,35 0,35 0,35 0,35 0,35 0,35 0,35 0,35 K136 - Parking aid warning lamp
sw gr/bl bl/li ws/ge br/ge bl/ws sw/ge bl/ro
K145 - Airbag disabled warning lamp, front
NL passenger’s side
FL SL /NSL TFL 58s T16b T16b T16b T16b T16b T16b T16b
2 3 4/15 5 9 10 T16b/3 /11 /13 /16 /8 /12 /4 /10 L9 - Lighting switch light bulb
E229 K6 E149 E266 K136 E462 K145 E256 L156 - Switch illumination bulb
T16b - 16-pin connector, black, on operating unit in
front of centre console
L156 T46a - 46-pin connector, black, CAN separating
E7 E18 K4 K13 K17 L9 connector, left
6/31 T16b/2 T16b/1
E1 31 E461 58s
T16b/7
15
372 - Earth connection -7-, in main wiring harness

0,35 0,35 0,35 0,35 375 - Earth connection -10-, in main wiring harness
br br gr/bl sw/bl ws = white
sw = black
344 B279 ro = red B279 - Positive (+) connection -3- (15a), in main wiring
br = brown harness
1,0 gn = green
sw/bl bl = blue
gr = grey • - CAN bus (data wire)
48
li = purple
375 372 ge = yellow
or = orange
99 100 101 102 103 104 105 106 107 108 109 110 111 112
97-55650

A00.5102.03.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/12
Onboard power supply control unit, power output
module for left headlight, left side light bulb, front
left turn signal bulb, left side turn signal bulb, left
dipped beam bulb, left main beam bulb, left
headlight range control motor

J519 - Onboard power supply control unit

J667 - Power output module for left headlight
M1 - Side light bulb, left
M5 - Turn signal bulb, front left
M18 - Side turn signal bulb, left
J519 M29 - Dipped beam bulb, left
M30 - Main beam bulb, left
B15 B12 C4 B21 B23 B20 T10a - 10-pin connector, black, on left headlight
V48 - Headlight range control motor, left
✱
0,5 0,5 0,5 1,0 1,5 0,35
gn/ws sw/ge gr/sw ws/sw ge/sw ws/ge 44 - Earth point, lower part of left A pillar

130 375 - Earth connection -10-, in main wiring harness

B455
B144 - Positive (+) connection (58L), in interior wiring
B144 B455
harness
B278 - Positive (+) connection -2- (15a), in main wiring
0,5 0,35
✱
0,35
✱ harness
gr/sw ws/ge li/ws B455 - Connection (LWR (headlight range control)), in
main wiring harness
BL 58L 56a 56b BUS
T10a/9 T10a/4 T10a/5 T10a/10 T10a/6 T10a/3
✱ - Only applies to headlights with gas discharge
M5 M1 J667 ✱ M30 M29 M V48 lamps and automatic dynamic headlight range
T10a/2 T10a/7 T10a/1 T10a/8 control
31 31 31 15a

✱
0,5
sw/li

B278
2/BL
B278
M18 ws = white
1/31 sw = black
ro = red
0,5 0,5 1,0 1,0
br = brown
br br br br gn = green
bl = blue
gr = grey
li = purple
375 375 375 44 ge = yellow
or = orange
113 114 115 116 117 118 119 120 121 122 123 124 125 126
97-55651

A00.5102.03.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/13
Onboard power supply control unit, power output
module for right headlight, right side light bulb,
front right turn signal bulb, right side turn signal
bulb, right dipped beam bulb, right main beam
bulb, right headlight range control motor

J519 - Onboard power supply control unit

J668 - Power output module for right headlight
M3 - Side light bulb, right
M7 - Turn signal bulb, front right
M19 - Side turn signal bulb, right
J519 M31 - Dipped beam bulb, right
M32 - Main beam bulb, right
B22 B19 C2 B10 B13 T10b - 10-pin connector, black, on right headlight
145 V49 - Headlight range control motor, right
0,35 2,5 1,0 0,5 0,5 0,5
li/ws ge ws gr/ro sw/gn gn 43 - Earth point, lower part of right A pillar

366 - Earth connection -1-, in main wiring harness

B455
B143 - Positive (+) connection (58R), in interior wiring
B455 B143
harness
125
B278 - Positive (+) connection -2- (15a), in main wiring
0,35 ✱ 0,35 ✱ 0,5
harness
li/ws ws/ge gr/ro B455 - Connection (LWR (headlight range control)), in
main wiring harness
BUS 56b 56a 58R BR
T10b/3 T10b/6 T10b/10 T10b/5 T10b/4 T10b/9
✱ - Only applies to headlights with gas discharge
M V49 J668 ✱ M31 M32 M3 M7 lamps and automatic dynamic headlight range
T10b/8 T10b/1 T10b/7 T10b/2 control
15a 31 31 31

✱
0,5
sw/li

B278
2/BR
B278
M19 ws = white
1/31 sw = black
ro = red
1,0 0,5 1,0 1,0 0,5 0,5
br = brown
sw/li sw/li br br br br gn = green
bl = blue
44 147 gr = grey
li = purple
43 366 366 366 ge = yellow
or = orange
127 128 129 130 131 132 133 134 135 136 137 138 139 140
97-55652

A00.5102.06.20 Edition 07.03

Audi A8 Current Flow Diagram No. 1/14
Onboard power supply control unit, left and right
fog light bulb, control unit for headlight range
control, high tone horn, low tone horn

H2 -
High tone horn
H7 -
Low tone horn
J4 -
Dual tone horn relay
J431 -
Headlight range control, control unit
J519 -
Onboard power supply control unit
L22 -
Fog light bulb, left
L23 -
Fog light bulb, right
J519 T10d -
10-pin connector, black, in engine
compartment, front left
B18 B16 C17 T46a - 46-pin connector, black, CAN separating
253 connector, left
1,0 1,0 0,35 1,5
gn gr br/ge ro/gn 203 - Earth connection, in front fog light wiring
harness
369 - Earth connection -4-, in main wiring harness
6/86 2/30
T10d T10d 2
/3 /5 375 - Earth connection -10-, in main wiring harness
J4
4/85 8/87
128 129
• - CAN bus (data wire)
2,5 2,5 0,35 0,5 0,35
gn gr li/ws sw/li ro/gn

254
2 2 5 23

L22 L23
431J
1 1 24/31 2 3
CAN-H CAN-L

2,5 2,5 0,35 • 0,35 • 1,0 1,0

br br or/sw or/br ro/ws ro/ws

203 T46a/6H T46a/6L 1 1

2,5
br
H2 H7 ws = white
2 2 sw = black
ro = red
T10d/4 br = brown
gn = green
2,5 0,5 1,0 1,0 bl = blue
br br br br
gr = grey
li = purple
375 369 375 375 ge = yellow
or = orange
141 142 143 144 145 146 147 148 149 150 151 152 153 154
97-55653

A00.5102.06.20 Edition 07.03

Audi A8 Current Flow Diagram No. 1/15
Voltage supply for onboard power supply control
unit, fuses

J519 - Onboard power supply control unit

SB5 - Fuse -5- on fuse box
SB6 - Fuse -6- on fuse box
SB7 - Fuse -7- on fuse box
SB12 - Fuse -12- on fuse box
SB15 - Fuse -15- on fuse box
SB31 - Fuse -31- on fuse box
SB38 - Fuse -38- on fuse box
J519
SB40 - Fuse -40- on fuse box

A5 B14 A4 A10 C1 A9 C3 C3 C5 375 - Earth connection -10-, in main wiring harness

31 31 30a 30a 30a 37 38
✱ ✱✱
2,5 0,35 2,5 2,5 0,35 2,5 0,35 0,35 0,35 2,5 4,0 ✱ - Models without additional lighting equipment
br br ro/gr ro/bl gr/bl ro/sw li/ws li/ws li/bl sw ro
✱✱ - Models with additional lighting equipment
442 439 441 448

5 6 7 31 12 15 38 40

SB5 SB6 SB7 SB31 SB12 SB15 SB38 SB40

10A 10A 5A 30A 5A 5A 30A 25A
5a 6a 7a 31a 12a 15a 38a 40a

1,5 1,0 0,5 0,5 0,5

ro ro/ge ro/gn ro/ws ro/ge

299 54 261 232 90

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
375 375 ge = yellow
or = orange
155 156 157 158 159 160 161 162 163 164 165 166 167 168
97-55654

A00.5102.02.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/16
Convenience system central control unit

J393 - Convenience system central control unit

SF1 - Fuse -1- on fuse box
SF2 - Fuse -2- on fuse box
SF3 - Fuse -3- on fuse box
T46b - 46-pin connector, black, CAN separating
connector, right

378 - Earth connection -13-, in main wiring harness

34

10,0
J393 B299 - Positive (+) connection -3- (30), in main wiring
ro
harness
B299
B17 B1 C3 C8 C4 B21 C7 C9 B316 - Positive (+) connection -2- (30a), in main wiring
CAN-H CAN-L 30a 30a 15 31 31
harness

2,5 4,0 2,5 2,5 4,0 0,35 • 0,35 • 2,5 2,5 1,0 0,35 0,5 2,5
ro ro ro ro ro or/gn or/br ro/gr ro/bl ro/sw sw br br • - CAN bus (data wire)

216 377 42
1 2 3 T46b T46b
/14H /14L
SF1 SF2 SF3
20A 10A 20A
1a 2a 3a

2,5
ro/sw

B316

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
378 378 ge = yellow
or = orange
169 170 171 172 173 174 175 176 177 178 179 180 181 182
97-55655

A00.5102.02.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/17
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 boot lid
L46 - Rear fog light bulb, left
M4 - Tail light bulb, left
M6 - Turn signal bulb, rear left
M9 - Brake light bulb, left
J393 M16 - Reversing light bulb, left
T6f - 6-pin connector, black, connector 1, on left tail
A1 A3 A2 B13 B9 A6 light
T8i - 8-pin connector, black, connector 2, on left tail
light, boot lid
1,0 0,5 1,0 0,5 0,5 0,5
sw/ro li/gn sw/ws bl/ge ws/gn li/bl
B472
50 - Earth point, luggage compartment, left
B472
B469
377 - Earth connection -12-, in main wiring harness
B473
B469 - Connection -5-, in main wiring harness

0,35 0,5 0,35 0,35 0,35 0,5

sw/ro sw/ws bl/ge bl/ge sw/ro sw/ws
B472 - Connection -8-, in main wiring harness

B473 - Connection -9-, in main wiring harness

58L BL 54 58L 54 NSL RFL
T6f/3 T6f/5 T6f/4 T6f/2 T8i/2 T8i/3 T8i/4 T8i/6 T8i/5

J690 J692

M4 M6 M9 M4 M9 L46 M16
T6f/1 T8i/1
31 31

0,5 1,0
br br
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
50 377 ge = yellow
or = orange
183 184 185 186 187 188 189 190 191 192 193 194 195 196
97-55656

A00.5102.01.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/18
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 boot
lid
L47 - Rear fog light bulb, right
M2 - Tail light bulb, right
J393 M8 - Turn signal bulb, rear right
M10 - Brake light bulb, right
A8 B8 A4 A5 A7 M17 - Reversing light bulb, right
T6h - 6-pin connector, black, connector 1, on right tail
light
0,5 0,5 1,0 0,5 1,0
bl ws/br sw/bl bl/ws sw/li T8k - 8-pin connector, black, connector 2, on right tail
B472 light, boot lid
B472
B470
51 - Earth point, luggage compartment, right
B474
376 - Earth connection -11-, in main wiring harness

0,5 0,35 0,35 0,35 0,5 0,35 B470 - Connection -6-, in main wiring harness
sw/bl sw/li bl/ge bl/ge sw/bl sw/li

B472 - Connection -8-, in main wiring harness

RFL NSL 54 58R 54 BR 58R
T8k/5 T8k/6 T8k/4 T8k/3 T8k/2 T6h/2 T6h/4 T6h/5 T6h/3
B474 - Connection -10-, in main wiring harness
J693 J691

M17 L47 M10 M2 M10 M8 M2

T8k/1 T6h/1
31 31

1,0 0,5
br br
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
376 51 ge = yellow
or = orange
197 198 199 200 201 202 203 204 205 206 207 208 209 210
97-55657

A00.5102.01.20 Edition 05.02

Audi A8 Current Flow Diagram No. 1/19
Convenience system central control unit, number
plate light, heated rear window, high level brake
light bulb

C18 - Windscreen aerial suppression filter

J9 - Heated rear window relay
J234 - Airbag control unit
J393 - Convenience system central control unit
M25 - High level brake light bulb
S41 - Heated rear window fuse
T2d - 2-pin connector, green, high level brake light,
J393 right D pillar
X4 - Number plate light, left
A9 B6 B10 B25 X5 - Number plate light, right
Z1 - Heated rear window
170

0,35 0,35 0,35 4,0 0,35 0,35 376 - Earth connection -11-, in main wiring harness
gr/gn gr/gn ws/bl ro sw/ro li/bl

378 - Earth connection -13-, in main wiring harness

1
A
S41 T2d/1 B228 383 - Earth connection -18-, in main wiring harness
40A
2

653 - Earth point, left D pillar

4,0 0,35 0,35
ro/bl sw/ro li/bl B228 - Connection (crash signal), in interior wiring
harness
2 2 6/86 2/30 C18 1 69
1 J234
X4 X5
1 1
J9 M25
4/85 8/87 2

4,0 0,35
ro/ws br

T2d/2
Z1 ws = white
sw = black
ro = red
0,35 0,35 0,5 4,0 0,35 br = brown
br br br br br gn = green
bl = blue
gr = grey
li = purple
376 376 378 653 383 ge = yellow
or = orange
211 212 213 214 215 216 217 218 219 220 221 222 223 224
97-55658

A00.5102.01.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/20
Convenience system central control unit, brake
light switch

F - Brake light switch

F47 - Cruise control system brake pedal switch
(diesel direct injection system)
J104 - ABS with EDL control unit
J393 - Convenience system central control unit
J623 - Engine control unit
SB 22 - Fuse -22- on fuse box
T17c - 17-pin connector, brown, in electronics box,
J393 plenum chamber

B19 B20 B335 - Connection -1- (54), in main wiring harness

90

B336 - Connection -2- (54), in main wiring harness

0,35 0,35 0,5
bl ro/sw sw/gn
B337 - Connection -3- (54), in main wiring harness
B335 22
B337
SB22
5A
165 22a

0,35 0,35 0,35 0,22 1,5 0,5 0,5

bl ro/sw ro/sw ro/sw ro/sw ro/ws sw/bl

7 97 32
J104 J104
1 3
T17c
/10
F F47
4 2

0,35 0,5 0,22

ro/sw ro/br ro/br

A56 B336
J623 T17c/9
ws = white
sw = black
0,35 0,35 ro = red
ro/br ro/br
br = brown
gn = green
37 A55 bl = blue
J104 J623 gr = grey
li = purple
ge = yellow
or = orange
225 226 227 228 229 230 231 232 233 234 235 236 237 238
97-55659

A00.5102.01.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/21
Convenience system central control unit, luggage
compartment light, rear lid light, rear footwell
illumination

J393 - Convenience system central control unit

L106 - Footwell illumination, rear left
L107 - Footwell illumination, rear right
T17h - 17-pin connector, grey, under driver’s seat
T17i - 17-pin connector, grey, under front passenger’s
seat
W18 - Luggage compartment light, left
J393
W35 - Luggage compartment light, right
W51 - Rear lid light
B7 B3 B4
367 - Earth connection -2-, in main wiring harness
0,35 0,5 0,5
ws/ro ro/li ro/bl 368 - Earth connection -3-, in main wiring harness

B476
371 - Earth connection -6-, in main wiring harness
T17h/15 T17i/15
376 - Earth connection -11-, in main wiring harness

378 - Earth connection -13-, in main wiring harness

0,35 0,35 0,35 1,0 1,0
ws/ro ws/ro ws/ro ro/li ro/li
B476 - Connection -12-, in main wiring harness

2 2 2 2 2 M43 - Connection -3-, in driver’s seat wiring harness

W18 W35 W51 L106 L107 M53 - Connection -3-, in front passenger’s seat wiring
1 1 1 1 1
harness
1,0 1,0
sw/ro sw/ro

M43 M53

2,5 2,5
br br
ws = white
sw = black
T17h/17 T17i/17 ro = red
br = brown
0,35 0,35 0,35 4,0 4,0 gn = green
br br br br br bl = blue
gr = grey
li = purple
371 378 376 367 368 ge = yellow
or = orange
239 240 241 242 243 244 245 246 247 248 249 250 251 252
97-55660

A00.5102.06.20 Edition 07.03

Audi A8 Current Flow Diagram No. 1/22
Wiper motor control unit, windscreen wiper motor,
washer pump, diagnosis connection

J217 - Automatic gearbox control unit

J400 - Wiper motor control unit
J623 - Engine control unit
SB8 - Fuse -8- on fuse box
SB24 - Fuse -24- on fuse box
41 46
SB25 - Fuse -25- on fuse box
10,0 0,5
sw/ge sw T16 - 16-pin connector, black, diagnosis connection
T17a - 17-pin connector, black, in electronics box,
24 25 8
plenum chamber
SB24 SB25 SB8 V - Windscreen wiper motor
15A 40A 5A
24a 25a D166 8a V5 - Washer pump

366 - Earth connection -1-, in main wiring harness

1,5 0,35 2,5 0,5 0,35 0,35 0,5
ro/gn ro/gn ro/gn gr/ws gr/ws gr/ws sw/bl
375 - Earth connection -10-, in main wiring harness
153 151 3 43
D166 - Connection (K diagnosis wiring), in engine
J217 J623 compartment wiring harness
T17a/8
111 163 334 336
• - CAN bus (data wire)
0,35 0,35 0,5 0,35• 0,35 • ✱ - From October 2002 onwards, phased-in
ge/ws gr/ws ro/gn or/li or/br modification
K 30 15 CAN-H CAN-L
1/30 5 T16/7 T16/16 T16/1 T16/6 T16
/14
M V
J400
2/31 3

1,0
gr/ro

M
T16/2 T16/10 T16/4 T16/5
31 31
V5 T16/3 ✱ T16/11 ✱ ws = white
2/31 CAN-H CAN-L sw = black
ro = red
br = brown
2,5 1,0 0,35 • 0,35 • 0,35 0,35 gn = green
br br gr/ro gr/ws br br bl = blue
gr = grey
330 334 li = purple
375 366 375 375 ge = yellow
or = orange
253 254 255 256 257 258 259 260 261 262 263 264 265 266
97-55661

A00.5102.06.20 Edition 07.03

Audi A8 Current Flow Diagram No. 1/23
Onboard power supply control unit -2-, Servotronic

F189 -
Tiptronic switch
J520 -
Onboard power supply control unit -2-
N119 -
Servotronic solenoid valve
SC24 -
Fuse -24- on fuse box
T8c -
8-pin connector, black, in centre console, on
selector lever console
T46b - 46-pin connector, black, CAN separating
connector, right

J520 368 - Earth connection -3-, in main wiring harness

120/30 114/31 83 84 85 105 113 B342 - Connection -3- (58d), in main wiring harness
CAN-H CAN-L
36

10,0 2,5 0,35 0,5 0,5 0,35 • 0,35• • - CAN bus (data wire)
sw/ge ro/ge gr/li ge/ws ge or/gn or/br

24
T46b T46b
/13H /13L
B342
SC24
20A
24a

0,35
gr/li

58d
T8c/2
1/+ 2/--
F189
N119

2,5
br
ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
368 ge = yellow
or = orange
267 268 269 270 271 272 273 274 275 276 277 278 279 280
97-55662

A00.5102.08.20 Edition 11.03

Audi A8 Current Flow Diagram No. 1/24
Onboard power supply control unit -2-, headlight
washer system pump, pop-up washer jet motor -
left and right headlight washer system, headlight
washer system relay, washer fluid heater relay,
heater element for washer jet

J39 - Headlight washer system relay

J520 - Onboard power supply control unit -2-
J711 - Washer fluid heater relay
SB18 - Fuse -18- on fuse box
SB19 - Fuse -19- on fuse box
J520 SC43 - Fuse -43- on fuse box
T10d - 10-pin connector, black, in engine
90 97 89 95 96 91 compartment, front left
V11 - Headlight washer system pump
47 50
B272 V248 - Pop-up washer jet motor, left headlight washer
0,5 6,0 2,5 6,0 0,5 0,5 0,5 0,5 0,5 0,35 2,5 system
ge/li ro ro ro ws/li ws/bl ws/gn ws/br sw/ge ro/br sw/ge V249 - Pop-up washer jet motor, right headlight
washer system
33 43 368 18 19
Z20 - Heater element, left washer jet
SC43 SB18 SB19 Z21 - Heater element, right washer jet
30A T10d T10d T10d T10d 5A 15A
43a /8 /9 /6 /7 18a 19a Z58 - Heated washer fluid hoses

366 - Earth connection -1-, in main wiring harness

2,5 1,0 1,0 1,0 1,0 0,5 0,5 2,5
ro/ws ws/br ws/gn ws/bl ws/li bl/ro bl/ro bl/li
375 - Earth connection -10-, in main wiring harness
6/86 2/30 2/-- 2/-- 6/86 2/30
5 4 388 - Earth connection -23-, in main wiring harness
M M ✱
J39 J 711
4/85 8/87 V248 1/+ V249 1/+ 4/85 8/87 B272 - Positive (+) connection (30), in main wiring
harness
2,5 2,5
ws/ro sw/gn ✱ - With washer fluid heater

2 1 1 2

M ✱
V11 Z20 Z21 Z 58 ws = white
1 2 2 1 sw = black
ro = red
br = brown
0,5 2,5 0,5 0,5 0,35 2,5 gn = green
br br br br br br bl = blue
gr = grey
li = purple
366 366 388 388 375 366 ge = yellow
or = orange
281 282 283 284 285 286 287 288 289 290 291 292 293 294
97-55663

A00.5102.08.20 Edition 11.03

Audi A8 Current Flow Diagram No. 1/25
Control unit with display in dash panel insert, brake
lining/pad wear senders, oil pressure switch

F1 - Oil pressure switch

G34 - Brake lining/pad wear sender, front left
G35 - Brake lining/pad wear sender, front right
J285 - Control unit with display in dash panel insert
K3 - Oil pressure warning lamp
K32 - Brake pad/lining warning lamp
T17a - 17-pin connector, black, in electronics box,
B318
plenum chamber
T32 - 32-pin connector, blue, on dash panel insert
0,35 0,35 0,35 1,5 0,35 0,35
ro ro ro ro ro ro/ge
366 - Earth connection -1-, in main wiring harness
161 331 332

369 - Earth connection -4-, in main wiring harness

30a 30a 30a
T32/1 T32/2 T32/18
401 - Earth connection (sender earth), in interior
wiring harness
B318 - Positive (+) connection -4- (30a), in main wiring
K32 J285 K3 harness
B379 - Connection -1- (brake wear indicator), in main
wiring harness
T32/3 T32/4 T32/19 T32/28 T32/7 T32/15 B380 - Connection -2- (brake wear indicator), in main
31 31 31 ✱ wiring harness
B381 - Connection -3- (brake wear indicator), in main
0,5 0,5 0,5 0,35
ro ge ro gr/sw wiring harness
B382 - Connection -4- (brake wear indicator), in main
wiring harness
B382 B381 B380 B379 T17a/1
✱ - Sender earth output
0,5 0,5 0,5 0,5
ro ge ge gr/sw

1 2 2 1 1

F1 ws = white
G34 G35 sw = black
ro = red
0,35 0,35 0,35 0,35 0,5
br = brown
br br br br/gr ro gn = green
bl = blue
gr = grey
li = purple
369 369 369 401 366 ge = yellow
or = orange
295 296 297 298 299 300 301 302 303 304 305 306 307 308
97-55664

A00.5102.02.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/26
Control unit with display in dash panel insert, oil
level thermo 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
45
B277 G17 - Ambient temperature sensor
0,5 0,35 1,0 1,0
sw/bl sw/bl sw/bl sw
G33 - Windscreen washer fluid level sender
G106 - Ambient temperature indicator
310 333 10 G266 - Oil level thermo sender
SB10 J285 - Control unit with display in dash panel insert
5A
10a K28 - Coolant temperature/coolant shortage warning
lamp
K106 - Washer fluid low warning lamp
K118 - Brake system warning lamp
SB 10 - Fuse -10- on fuse box
T17a - 17-pin connector, black, in electronics box,
plenum chamber
J285 K118 K106 K28 G106 ✱ + 28,8 °C ✱ T17d - 17-pin connector, blue, in electronics box,
plenum chamber
T32 - 32-pin connector, blue, on dash panel insert
T32/8 T32/14 T32/20 T32/21 T32/24

310 85 - Earth connection -1-, in engine compartment

wiring harness
0,35 0,5 0,35 0,35 0,35 0,35
bl/gr sw/bl gn br/bl gn/ge sw/ge 369 - Earth connection -4-, in main wiring harness

401 - Earth connection (sender earth), in interior

T17a T17d/14 wiring harness
/2
B277 - Positive (+) connection -1- (15a), in main wiring
0,35 0,35 harness
bl/gr sw/bl

3 1 2 2 3 2
ϑ

G266 F34 G33 F66 G17 ws = white

2/31 1 1 1 1 sw = black
ro = red
br = brown
1,0
0,35 0,35 0,35 0,35 gn = green
br br/ge bl = blue
br br/ge br/ge
gr = grey
li = purple
85 369 401 401 401 ge = yellow
or = orange
309 310 311 312 313 314 315 316 317 318 319 320 321 322
97-55665

A00.5102.02.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/27
Control unit with display in dash panel insert, radio
controlled clock, electric park and handbrake
control unit, radio controlled clock receiver, data
bus diagnostic interface

J285 - Control unit with display 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
J540 J540 K214 - Electric parking brake and handbrake fault
2 8 warning lamp
T17o - 17-pin connector, black, in luggage
0,35 0,35 compartment
gn/ws gn/li
T32 - 32-pin connector, blue, on dash panel insert
Y8 - Radio controlled clock
T32/11 T32/12

370 - Earth connection -5-, in main wiring harness

Y8 K213 K214 J285 371 - Earth connection -6-, in main wiring harness

B415 - Connection -1- (infotainment CAN bus, high), in

T32/9 T32/10 T32/5 T32/29 T32/30 main wiring harness
Wake CAN-H CAN-L B421 - Connection -1- (infotainment CAN bus, low), in
Up 259 261
main wiring harness
0,35 0,35 0,35 0,35 • 0,35 0,35 0,35 • 0,35 0,35
bl/ge bl/ro ge gr/ro gr/ro gr/ro gr/ws gr/ws gr/ws
B415 B421 • - CAN bus (data wire)
3 9 22

T17o T17o
/16 /15 J533
14/31 15/31 1/30 2/30 16/15 11 24
CAN-H CAN-L

0,35 0,35 0,35 0,35 0,35 0,35 0,35 • 0,35 •

bl/ge bl/ro br ro ro/ge sw/bl or/li or/br

1/S 3/+ 2/31

301 302 311 265 266
T17o ws = white
/17
J489 sw = black
ro = red
br = brown
0,35 0,35 0,35 gn = green
br br br
bl = blue
gr = grey
li = purple
371 370 370 ge = yellow
or = orange
323 324 325 326 327 328 329 330 331 332 333 334 335 336
97-55666

A00.5102.04.20 Edition 03.03

Audi A8 Current Flow Diagram No. 1/28
Control unit with display in dash panel insert, data
bus diagnostic interface, front information control
unit, shelf illumination

J285 - Control unit with display in dash panel insert

J428 - Control unit for adaptive cruise control
J523 - Front information control unit
J533 - Data bus diagnostic interface
B341 L120 - Shelf illumination
337 338 465 452 454
L121 - Cup holder illumination
29
0,35 0,35 0,5 0,35 0,35 0,5 0,35 0,35 0,35 SB 29 - Fuse -29- on fuse box
gr/bl gr/bl gr/bl gr/bl gr/bl gr/bl gr/bl gr/bl gr/bl SB29 T32 - 32-pin connector, blue, on dash panel insert
1A
98 110 450 29a T46b - 46-pin connector, black, CAN separating
connector, right
0,35 B340 0,5 0,35 0,35
gr/bl gr/bl gr/bl gr/gn
370 - Earth connection -5-, in main wiring harness
58s
104 468 T32/17
373 - Earth connection -8-, in main wiring harness

B340 - Connection -1- (58s), in main wiring harness

J285
B341 - Connection -2- (58s), in main wiring harness

B509 - Connection -3- (diagnosis), in main wiring

T46b T46b T46b T46b harness (ring circuit monitor diagnosis)
/10H /10L /2H /2L

0,35 • 0,35 • 0,35 • 0,35 •

or/gn or/br or/sw or/br • - CAN bus (data wire)
CAN-H CAN-L CAN-H CAN-L ✱ - Only models with adaptive cruise control
6 19 8 21

J533
13 26 4
337 338 CAN-H CAN-L Most

0,35 0,35 0,35 • 0,35 • 0,35

gr/bl gr/bl or/li or/br ws/ge

2 2 J523
2 4
L121 J428 J428 ws = white
L120 1/31 1/31 ✱ ✱ A/3 A/1 A/2 sw = black
30 31 ro = red
br = brown
0,5 0,5 0,35 0,35 0,35 gn = green
br br ws/ge ro/gn br
bl = blue
B509 gr = grey
29
li = purple
373 373 370 ge = yellow
or = orange
337 338 339 340 341 342 343 344 345 346 347 348 349 350
97-55667

A00.5102.04.20 Edition 03.03

Audi A8 Current Flow Diagram No. 1/29
Control unit with display in dash panel insert, fuel
gauge senders, fuel pump (pre-supply pump), fuel
pump, fuel gauge

G - Fuel gauge sender

G1 - Fuel gauge
G6 - Fuel pump (pre-supply pump)
G23 - Fuel pump
G169 - Fuel gauge sender 2
G237 - Fuel gauge sender 3
G393 - Fuel gauge sender 4
J285 - Control unit with display in dash panel insert
T4a - 4-pin connector, under cover, right, on vehicle
floor
T6e - 6-pin connector, under cover, right, on vehicle
floor
T32 - 32-pin connector, blue, on dash panel insert

361 - Earth connection (fuel gauge sender), in main

wiring harness
J285 G1 675 - Earth point 2, in luggage compartment, right

T32/27 T32/25 T32/22 T32/26 T32/23

378 366

2,5 0,35 0,35 0,35 0,35 0,35 2,5

sw/ws gn/ro gn/ws br/bl gn/li gn/ge sw/ge

T4a/1 T6e/4 T6e/1 T6e/5 T6e/2 T6e/3 T4a/2

2,5 2,5 0,35 0,35 0,35 0,35 2,5 2,5

br sw/ws gr/bl gr/ws gr/li gr/ge sw/ge br

A4/-- A1/+ B2 A2 B2 A2 A1/+ A4/--

G169
T4a G 6 M G G237 G393 M G23 T4a/4
/3
ws = white
B4 A3 B4 A3 sw = black
ro = red
br = brown
2,5 0,35 0,35 1,0 0,35 0,35 2,5 gn = green
br br/bl br/bl br/bl br/bl br/bl br bl = blue
gr = grey
361
li = purple
675 675 ge = yellow
or = orange
351 352 353 354 355 356 357 358 359 360 361 362 363 364
97-55668

A00.5102.09.20 Edition 02.04

Audi A8 Current Flow Diagram No. 1/30
Fuel pump relay, electric fuel pump 2 relay

J17 - Fuel pump relay

J49 - Electric fuel pump 2 relay
J623 - Engine control unit
SC 29 - Fuse 29 on fuse box
SC 31 - Fuse 31 on fuse box
SF 10 - Fuse 10 on fuse box
T10c - 10-pin connector, red, in electronics box,
2,5 2,5 B146
ro/sw sw plenum chamber
T17a - 17-pin connector, black, in electronics box,
29 31 10 plenum chamber
SC29 SC31 SF10
20A 20A 20A
29a 31a 10a B146 - Positive (+) connection 1 (87), in interior wiring
J623 J623 harness
65 45
B300 - Positive (+) connection 4 (30), in main wiring
2,5 2,5 0,35 0,5 2,5 harness
bl/ws sw/ge br/gn sw/bl sw/ws D95 - Connection (injectors), in engine compartment
wiring harness
361 353

T10c/8 T17a/9 T17a/3

2,5 4,0 0,5 0,5 4,0

bl/ws ro/sw br/gn sw/bl ro/gr

D95
2/87 4 5 2/87
4 3

J17 J49
1/30 3 3 1/30

4,0 0,5 0,5 4,0

ro sw sw ro

40 40 173
B300

6,0 ws = white
ro
sw = black
ro = red
285 br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
365 366 367 368 369 370 371 372 373 374 375 376 377 378
97-55669

A00.5102.09.20 Edition 02.04

Audi A8 Current Flow Diagram No. 1/31
Roof electronics control unit, illuminated vanity
mirror, interior monitor sender/receiver module 1,
automatic anti-dazzle interior mirror, light sensor,
humidity sender, interior light switch

E317 - Interior light switch

F147 - Vanity mirror contact switch, driver’s side
F148 - Vanity mirror contact switch, front passenger’s
side
G303 - Interior monitor sender/receiver module 1
G355 - Humidity sender
W14 W20 G399 - Light sensor
J528 - Roof electronics control unit
1/-- 2/+ 1/-- 2/+ T8f - 8-pin connector, black, near interior light, front
0,12 0,12 0,12 0,12
T26a - 26-pin connector, on roof console, front
T26a T26a T26a T26a T46b - 46-pin connector, black, CAN separating
/25 /26 /12 /13 connector, right
W14 - Illuminated vanity mirror, front passenger’s side
G303 Y7 G399 E317 W20 - Illuminated vanity mirror, driver’s side
Y7 - Automatic anti-dazzle interior mirror
J528
368 - Earth connection -3-, in main wiring harness
G355
B479 - Connection -15-, in main wiring harness
T8f/1 T8f/2 T8f/3 T8f/4 T8f/6 T8f/7 T8f/8
30 31 CAN-H CAN-L
• - CAN bus (data wire)
1,0 0,35 • 0,35 • 0,35 0,35 0,35
ro/ge or/gn or/br gn ro/gn bl

30
T46b/17H T46b/17L
B479

0,35 0,35
ro/gn ro/gn

2 1 1 2

F148 F147 ws = white

sw = black
ro = red
br = brown
1,0 gn = green
br bl = blue
gr = grey
li = purple
368 ge = yellow
or = orange
379 380 381 382 383 384 385 386 387 388 389 390 391 392
97-55670

A00.5102.03.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/32
Roof electronics control unit, interior light, front
interior light button, reading light buttons

E326 - Interior light button, front

E457 - Reading light button, driver’s side
E458 - Reading light button, front passenger’s side
J528 - Roof electronics control unit
T26a - 26-pin connector, on roof console, front
W13 - Reading lamp, front passenger’s side
W16 - Interior light, left
W17 - Interior light, right
W19 - Reading lamp, driver’s side

✱ - Flat cable (8-wire)

✱✱ - Flat cable (10-wire)

aus ein autom

E326 W16 W17 E457 W19 E458 W13

J528

T26a/1 T26a/2 T26a/3 T26a/4 T26a/5 T26a/6 T26a/7 T26a/8 T26a/9 T26a/10 T26a T26a T26a
/14 /15 /16

0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,12 ✱ ✱ 0,3 ✱ 0,3 ✱ 0,3 ✱

421 422 423 424 425 426 427 428 429 430 413 414 415

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
393 394 395 396 397 398 399 400 401 402 403 404 405 406
97-55671

A00.5102.03.20 Edition 10.02

Audi A8 Current Flow Diagram No. 1/33
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 roof console, front
T26b - 26-pin connector, on roof console, rear

✱ - Flat cable (8-wire)

E383 E384 E385

J528 E467

T26a T26a T26a T26a T26a/21 T26b/1 T26b/2 T26b/3 T26b/4 T26b/5 T26b/6 T26b/7 T26b
/17 /18 /19 /20 /8

0,3 ✱ 0,3 ✱ 0,3 ✱ 0,3 ✱ 0,3 ✱ 0,3 ✱ 0,3 ✱ 0,3 ✱

404 405 406

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
407 408 409 410 411 412 413 414 415 416 417 418 419 420
97-55672

A00.5102.06.20 Edition 07.03

Audi A8 Current Flow Diagram No. 1/34
Rear operating unit for roof module, rear reading
light, rear interior light

E327 - Interior light button, rear

E454 - Rear left reading light switch
E455 - Rear right reading light switch -1-
E467 - Rear operating unit for roof module
T26b - 26-pin connector, on roof console, rear
W11 - Rear left reading light
W12 - Rear right reading light
W47 - Rear left interior light
W48 - Rear right interior light

✱ - Flat cable (10-wire)

aus ein autom

E327 W47 W48 E454 W11 W12

E467

E455

T26b T26b T26b T26b T26b T26b T26b T26b T26b T26b/23
/14 /15 /16 /17 /18 /19 /20 /21 /22

0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱ 0,12 ✱

393 394 395 396 397 398 399 400 401 402

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li = purple
ge = yellow
or = orange
421 422 423 424 425 426 427 428 429 430 431 432 433 434
97-55673

A00.5102.06.20 Edition 07.03

Audi A8 Current Flow Diagram No. 1/35
Rear operating unit for roof module, rear
illuminated vanity mirror, glove box light, left and
right footwell light

E26 - Glove box light switch

E467 - Rear operating unit for roof module
F189 - Tiptronic switch
T8b - 8-pin connector, black, behind dash panel, right
T8c - 8-pin connector, black, in centre console, on
selector lever console
T26b - 26-pin connector, on roof console, rear
W6 - Glove box light
W9 - Left footwell light
W10 - Right footwell light
W49 - Rear left illuminated vanity mirror
163
B466 W50 - Rear right illuminated vanity mirror
0,35 0,5 0,35 0,35
gr/bl gr/bl gr/bl li/bl
81 - Earth connection -1-, in dash panel wiring
harness (glove box)
159 T8c/3 369 - Earth connection -4-, in main wiring harness
E467 F189
T8b/2 T8b/7
370 - Earth connection -5-, in main wiring harness

0,5
B466 - Connection -2-, in main wiring harness
T26b T26b T26b T26b gr/ge
/25 /26 /12 /13
0,12 0,12 0,12 0,12 ✱ - Models without additional lighting equipment
2/+ 1/-- 2/+ 1/-- 2
✱✱ - Models with additional lighting equipment

W6
1
W49 W50
161 162
✱ ✱✱
0,35 0,35 0,5 0,35 0,35
li/ws li/ws br li/bl li/bl

2 2 2 2 2
✱ ✱✱ ✱ ✱✱
W9 W9 E26 W10 W10 ws = white
1/31 1/31 1/31 1/31 1/31 sw = black
T8b/1 ro = red
br = brown
✱ ✱✱ gn = green
0,5 1,0 0,5 0,35 0,5 0,35 0,35
br br br br br br br bl = blue
gr = grey
li = purple
81 370 369 369 81 81 81 ge = yellow
or = orange
435 436 437 438 439 440 441 442 443 444 445 446 447 448
97-55674

A00.5102.04.20 Edition 03.03

Audi A8 Current Flow Diagram No. 1/36
Illumination of rear storage compartment in centre
console, map reading lamp, centre armrest
illumination

L34 - Map reading lamp

L157 - Centre armrest illumination
L159 - Illumination of rear storage compartment in
centre console
S132 - Fuse 2, 60 A, in luggage compartment, rear
right
SC18 - Fuse -18- on fuse box
SD7 - Fuse -7- on fuse box
T2aa - 2-pin connector, rear, below rear footwell vents
B301 T2ab - 2-pin connector, rear, below rear footwell vents
345 340 341 41 U5 - 12 V socket
0,35 0,35 0,35 0,35
# 2,5 6,0
gr/bl gr/bl gr/bl sw ro ro 371 - Earth connection -6-, in main wiring harness

372 - Earth connection -7-, in main wiring harness

18 7

SC18 SD7 S132 / 60 A 373 - Earth connection -8-, in main wiring harness
5A 20A
18a 7a

B301 - Positive (+) connection -5- (30), in main wiring

T2aa/1 T2ab/1 # harness
0,35 2,5
sw/ge ro/li
✱ - Storage compartment, left
2 1 1 2 2
✱✱ - Storage compartment, right
✱✱✱ - Models with additional lighting equipment
✱ ✱✱ ✱✱✱
L159 L 157 L 157 L
34 U5 # - To be phased out gradually from January 2003
1/31 2/31 2/31 1/31
1/31

T2aa/2 T2ab/2

ws = white
sw = black
ro = red
br = brown
# gn = green
0,35 0,35 0,35 0,35 2,5
br br br br br bl = blue
gr = grey
li = purple
373 372 372 372 371 ge = yellow
or = orange
449 450 451 452 453 454 455 456 457 458 459 460 461 462
97-56187

A00.5102.04.20 Edition 03.03

Audi A8 Current Flow Diagram No. 1/37
Cigarette lighter, rear cigarette lighter

L28 - Cigarette lighter light bulb

SC36 - Fuse -36- on fuse box
SC37 - Fuse -37- on fuse box
U1 - Cigarette lighter
U9 - Cigarette lighter, rear

372 - Earth connection -7-, in main wiring harness

39
373 - Earth connection -8-, in main wiring harness
6,0
ro
B272 - Positive (+) connection (30), in main wiring
B272
harness

2,5 2,5
ro ro

36 37

SC36 SC37
20A 20A
36a 37a

2,5 2,5
ro/ws ro/bl

339 342

0,5 0,5
gr/bl gr/bl

2 3/58s 2 3/58s

U1 U9 ws = white
1/31 L28 1/31 L28 sw = black
ro = red
br = brown
2,5 2,5 gn = green
br br bl = blue
gr = grey
li = purple
372 373 ge = yellow
or = orange
463 464 465 466 467 468 469 470 471 472 473 474 475 476
97-56300

A00.5102.02.20 Edition 10.02