Automatic anti-dazzle interior mirror

●

Automatic headlight switching

●

Surround lighting: "coming/leaving home function"

From model year 2004

Audi A4

Current Flow Diagram

No. 29 / 1

Edition 09.2003

Main fuse

On battery

Connector point, A pillar

On left-hand side, bottom, behind side trim

Page 1 of 8

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10 - 17-pin connector, orange (T17f)
16 - 17-pin connector, red (T17a)
17 - 17-pin connector, black (T17)

Connector point, A pillar

On right hand-side, bottom, behind trim

15 - 17-pin connector, red (T17c)

4-point relay carrier with screw connection

Dash panel, driver's side

9-point relay carrier with onboard power supply control unit

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Dash panel, driver's side, behind 3-point relay carrier

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Audi A4

Current Flow Diagram

No. 29 / 2

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow
or = orange
rs = pink

Voltage supply, onboard power supply control unit
D

- Ignition/starter switch

J431

- Headlight range control, control unit

J519

- Onboard power supply control unit

S10

- Fuse in fuse box/relay plate

T10b

- 10-pin connector, black, on onboard power supply control unit

T23

- 23-pin connector, black, on onboard power supply control unit

135

- Earth connection -2-, in dash panel wiring harness

501

- Screw connection -2- (30), on relay plate

A2

- Positive (+) connection (15), in dash panel wiring harness

A32

- Positive (+) connection (30), in dash panel wiring harness

A57

- Positive (+) connection -3- (30), in dash panel wiring harness

*

- Only applies to models with headlight range control

**

- Only applies to models with automatic headlight range control

Audi A4

Current Flow Diagram

No. 29 / 3

Page 4 of 8

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ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow
or = orange
rs = pink

Onboard power supply control unit, lighting switch, headlight
range control adjuster
E1

- Lighting switch

E102 - Headlight range control adjuster
E491 - Surround lights deactivation switch
J285

- Control unit with display in dash panel insert

J519

- Onboard power supply control unit

T6i

- 6-pin connector, brown, behind side trim, rear left

T17f

- 17-pin connector, orange, connector point, A pillar, left

T32a

- 32-pin connector, green, on dash panel insert

T32b

- 32-pin connector, grey, on onboard power supply control unit

135

- Earth connection -2-, in dash panel wiring harness

238

- Earth connection -1-, in interior wiring harness

A19

- Connection (58d), in dash panel wiring harness

A51

- Connection (56), in dash panel wiring harness

A175

- Connection (58s), in dash panel wiring harness

*

- Only applies to models with headlight range control

**

-

Avant models - see applicable Current Flow Diagram: Avant
models, rear

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Audi A4

Current Flow Diagram

No. 29 / 4

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow
or = orange
rs = pink

Onboard power supply control unit, side light bulb, dipped beam
bulb
E23

- Front and rear fog light switch

J519

- Onboard power supply control unit

M1

- Side light bulb, left

M3

- Side light bulb, right

M29

- Dipped beam bulb, left

M31

- Dipped beam bulb, right

T17

- 17-pin connector, black, connector point, A pillar, left

T17a

- 17-pin connector, red, connector point, A pillar, left

T17c

- 17-pin connector, red, connector point, A pillar, right

T23

- 23-pin connector, black, on onboard power supply control unit

T32b

- 32-pin connector, grey, on onboard power supply control unit

V48

- Headlight range control motor, left

V49

- Headlight range control motor, right

176

- Earth connection, in right headlight wiring harness

179

- Earth connection, in left headlight wiring harness

A85

- Connection (58R), in dash panel wiring harness

A114

-

Connection (headlight range control), in dash panel wiring
harness

B167

- Connection (56b), in interior wiring harness

*

- Only applies to models with headlight range control

**

- Only applies to models with US equipment

Audi A4

Current Flow Diagram

No. 29 / 5

Page 6 of 8

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ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow
or = orange
rs = pink

Onboard power supply control unit, fog light bulb, tail light bulb,
number plate light
J519

- Onboard power supply control unit

L22

- Fog light bulb, left

L23

- Fog light bulb, right

M2

- Tail light bulb, right

M4

- Tail light bulb, left

T4k

- 4-pin connector, black, near front bumper

T4l

- 4-pin connector, black, in rear lid

T17

- 17-pin connector, black, connector point, A pillar, left

T23

- 23-pin connector, black, on onboard power supply control unit

T32b

- 32-pin connector, grey, on onboard power supply control unit

X

- Number plate light

86

- Earth connection -1-, in rear wiring harness

87

- Earth connection -2-, in rear wiring harness

249

- Earth connection -2-, in interior wiring harness

345

- Earth connection, in bumper, horn/fog light wiring harness

B132

- Connection (number plate light), in interior wiring harness

*

-

Avant models applicable Current Flow Diagram: Avant
models, rear

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Audi A4

Current Flow Diagram

No. 29 / 6

ws = white
sw = black
ro = red
br = brown
gn = green
bl = blue
gr = grey
li

= purple

ge = yellow
or = orange
rs = pink

Light sensor, door control unit, automatic anti-dazzle interior
mirror
G399 - Light sensor
J386

- Door control unit, driver's side

J387

- Door control unit, front passenger's side

J519

- Onboard power supply control unit

T10e

- 10-pin connector, black, on door control unit, driver's door

T10f

-

10-pin connector, black, on door control unit, front
passenger's door

T17f

- 17-pin connector, orange, connector point, A pillar, left

T20

- 20-pin connector, black, door, A pillar, left

T20a

- 20-pin connector, black, door, A pillar, right

T32b

- 32-pin connector, grey, on onboard power supply control unit

W

- Interior light, front

Y7

- Automatic anti-dazzle interior mirror

44

- Earth point, lower part of left A pillar

347

- Earth connection, in roof wiring harness

A187

-

Connection -1- (automatic anti-dazzle exterior mirror), in dash
panel wiring harness

A188

-

Connection -2- (automatic anti-dazzle exterior mirror), in dash
panel wiring harness

*

-

Only applies to models with automatic anti-dazzle exterior
mirror

Page 8 of 8

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