Wiring Diagram AUDI A4 2005 - Earth connections
T4k | 4-pin connector, black, near front bumper |
3 | Earth strap, engine - body |
12 | Earth point, on left in engine compartment |
26 | Earth point, on front apron |
50 | Earth point, on left in luggage compartment |
78 | Earth point, lower part of right B-pillar |
83 | Earth connection 1, in front right wiring harness |
86 | Earth connection 1, in rear wiring harness |
87 | Earth connection 2, in rear wiring harness |
121 | Earth connection 2, in front right wiring harness |
179 | Earth connection, in left headlight wiring harness |
249 | Earth connection 2, in interior wiring harness |
345 | Earth connection, in bumper wiring harness |
* | Cross-section 4.0 possible |
** | Cross-section 6.0 possible |
*** | ⇒ applicable engine Current Flow Diagram |
Wiring Diagram AUDI A4 2005 - Earth connections
T10c | 10-pin connector, violet, coupling station on left of A-pillar |
32 | Earth point, on left behind dash panel insert |
33 | Earth point, on right behind dash panel |
43 | Earth point, lower part of right A-pillar |
44 | Earth point, lower part of left A-pillar |
49 | Earth point, near convenience system central control unit |
77 | Earth point, lower part of left B-pillar |
81 | Earth connection 1, in dash panel wiring harness |
135 | Earth connection 2, in dash panel wiring harness |
176 | Earth connection, in right headlight wiring harness |
238 | Earth connection 1, in interior wiring harness |
261 | Earth connection, in heated washer jet wiring harness |
277 | Earth connection 3, in interior wiring harness |
Wiring Diagram AUDI A4 2005 - Ignition/starter switch - main fuse
A | Battery |
B | Starter |
D | Ignition/starter switch |
S88 | Strip fuse |
T17j | 17-pin connector, brown, coupling station on electronics box, plenum chamber |
11 | Earth point, in battery box |
500 | Screw connection 1 (30), on relay plate |
501 | Screw connection 2 (30), on relay plate |
A2 | Positive connection (15), in dash panel wiring harness |
A21 | Connection (86s), in dash panel wiring harness |
A32 | Positive connection (30), in dash panel wiring harness |
A33 | Connection (75), in dash panel wiring harness |
* | for models with washer jet heater element only |
** | ⇒ applicable engine Current Flow Diagram |
Wiring Diagram AUDI A4 2005 - Steering column electronics control unit - GND
E45 | Cruise control system switch |
J527 | Steering column electronics control unit |
J623 | Engine control unit |
T16a | 16-pin connector, black, on steering column electronics control unit |
T17e | 17-pin connector, white, coupling station on electronics box, plenum chamber |
135 | Earth connection 2, in dash panel wiring harness |
A2 | Positive connection (15), in dash panel wiring harness |
* | ⇒ applicable engine Current Flow Diagram |
Wiring Diagram AUDI A4 2005 - Turn signal switch - intermittent wiper switch - steering angle sender - horn plate - steering column electronics control unit
E2 | Turn signal switch |
E22 | Intermittent wiper switch |
G85 | Steering angle sender |
H | Horn plate |
J527 | Steering column electronics control unit |
Wiring Diagram AUDI A4 2005 - Onboard supply control unit - steering column electronics control unit - windscreen wiper motor - washer pump - rear window wiper motor
J519 | Onboard supply control unit |
J527 | Steering column electronics control unit |
T8j | 8-pin connector, black, behind side trim on rear left |
T10b | 10-pin connector, black, on onboard supply control unit |
T10c | 10-pin connector, violet, coupling station on left of A-pillar |
T16a | 16-pin connector, black, on steering column electronics control unit |
T17 | 17-pin connector, black, coupling station on left of A-pillar |
T23 | 23-pin connector, black, on onboard supply control unit |
T32b | 32-pin connector, grey, on onboard supply control unit |
V | Windscreen wiper motor |
V5 | Washer pump |
V12 | Rear window wiper motor |
261 | Earth connection, in heated washer jet wiring harness |
A146 | Connection (convenience CAN bus, high), in dash panel wiring harness |
A147 | Connection (convenience CAN bus, low), in dash panel wiring harness |
* | For Avant models ⇒ see applicable Current Flow Diagram: Avant models, rear |
Wiring Diagram AUDI A4 2005 - Light switch - headlight range control regulator
E1 | Light switch |
E23 | Front and rear fog light switch |
E102 | Headlight range control regulator |
E491 | Deactivation switch for surround lighting |
J431 | Headlight range control, control unit |
J519 | Onboard supply control unit |
S10 | Fuse in relay plate fuse holder |
T6i | 6-pin connector, brown, behind side trim on rear left |
T32b | 32-pin connector, grey, on onboard 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 |
A114 | Connection (headlight range control), in dash panel wiring harness |
* | for models with automatic headlight switching / surround lighting only ⇒ applicable Current Flow Diagram |
** | For Avant models ⇒ see applicable Current Flow Diagram: Avant models, rear |
*** | for models with headlight range control only |
**** | for models without headlight range control only ⇒ applicable Current Flow Diagram headlight |
***** | for models with automatic headlight range control only ⇒ applicable Current Flow Diagram |
# | applicable from January 2005 |
Wiring Diagram AUDI A4 2005 - Left headlight - left fog light
J519 | Onboard supply control unit |
L22 | Left fog light bulb |
M1 | Left side light bulb |
M5 | Front left turn signal bulb |
M18 | Left side mounted turn signal bulb |
M29 | Left dipped beam bulb |
M30 | Left main beam bulb |
T4k | 4-pin connector, black, near front bumper |
T17 | 17-pin connector, black, coupling station on left of A-pillar |
T17a | 17-pin connector, red, coupling station on left of A-pillar |
T17b | 17-pin connector, green, coupling station on left of A-pillar |
T23 | 23-pin connector, black, on onboard supply control unit |
T32b | 32-pin connector, grey, on onboard supply control unit |
V48 | Left headlight range control motor |
179 | Earth connection, in left headlight wiring harness |
345 | Earth connection, in bumper wiring harness |
A6 | Positive connection (left turn signal), in dash panel wiring harness |
* | for models without headlight range control only |
** | for models with headlights highline, headlights lowline only ⇒ applicable Current Flow Diagram |
*** | for models with headlight range control only |
Wiring Diagram AUDI A4 2005 - Right headlight - right fog light
J519 | Onboard supply control unit |
L23 | Right fog light bulb |
M3 | Right side light bulb |
M7 | Front right turn signal bulb |
M19 | Right side mounted turn signal bulb |
M31 | Right dipped beam bulb |
M32 | Right main beam bulb |
T4k | 4-pin connector, black, near front bumper |
T17 | 17-pin connector, black, coupling station on left of A-pillar |
T17c | 17-pin connector, red, coupling station on right of A-pillar |
T23 | 23-pin connector, black, on onboard supply control unit |
T32b | 32-pin connector, grey, on onboard supply control unit |
V49 | Right headlight range control motor |
176 | Earth connection, in right headlight wiring harness |
345 | Earth connection, in bumper wiring harness |
A5 | Positive connection (right turn signal), in dash panel wiring harness |
* | for models with headlight range control only |
** | for models with headlights highline, headlights lowline only ⇒ applicable Current Flow Diagram |
Wiring Diagram AUDI A4 2005 - Reversing lights
J519 | Onboard supply control unit |
M2 | Right tail light bulb |
M4 | Left tail light bulb |
M6 | Rear left turn signal bulb |
M8 | Rear right turn signal bulb |
M9 | Left brake light bulb |
M10 | Right brake light bulb |
M16 | Left reversing light bulb |
M17 | Right reversing light bulb |
M25 | High level brake light bulb |
T4l | 4-pin connector, black, in rear lid |
T23 | 23-pin connector, black, on onboard supply control unit |
T32b | 32-pin connector, grey, on onboard 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 |
A87 | Connection (RL), in dash panel wiring harness |
B132 | Connection (number plate lights), in interior wiring harness |
* | For Avant models ⇒ see applicable Current Flow Diagram: Avant models, rear |
** | applicable from January 2005 |
Wiring Diagram AUDI A4 2005 - Hazard warning lights button - treble tone horn - bass tone horn - rear fog light bulb
E229 | Hazard warning lights button |
H2 | Treble tone horn |
H7 | Bass tone horn |
J4 | Dual tone horn relay |
J519 | Onboard supply control unit |
L46 | Rear left fog light bulb |
L47 | Rear right fog light bulb |
T17a | 17-pin connector, red, coupling station on left of A-pillar |
T17c | 17-pin connector, red, coupling station on right of A-pillar |
T23 | 23-pin connector, black, on onboard supply control unit |
T32b | 32-pin connector, grey, on onboard supply control unit |
81 | Earth connection 1, in dash panel wiring harness |
87 | Earth connection 2, in rear wiring harness |
135 | Earth connection 2, in dash panel wiring harness |
176 | Earth connection, in right headlight wiring harness |
179 | Earth connection, in left headlight wiring harness |
* | For Avant models ⇒ see applicable Current Flow Diagram: Avant models, rear |
Wiring Diagram AUDI A4 2005 - Brake light switch - X-contact relief relay - headlight washer system pump
F | Brake light switch |
J59 | X-contact relief relay |
J519 | Onboard supply control unit |
T10b | 10-pin connector, black, on onboard supply control unit |
T17b | 17-pin connector, green, coupling station on left of A-pillar |
T23 | 23-pin connector, black, on onboard supply control unit |
T32b | 32-pin connector, grey, on onboard supply control unit |
V11 | Headlight washer system pump |
81 | Earth connection 1, in dash panel wiring harness |
135 | Earth connection 2, in dash panel wiring harness |
179 | Earth connection, in left headlight wiring harness |
A18 | Connection (54), in dash panel wiring harness |
A34 | Connection (75x), in dash panel wiring harness |
A57 | Positive connection 3 (30), in dash panel wiring harness |
* | Protected via fuse S237, for models with headlight washer system only |
Wiring Diagram AUDI A4 2005 - Fuses - radio connector III
S12 | Fuse in relay plate fuse holder |
S13 | Fuse in relay plate fuse holder |
S14 | Fuse in relay plate fuse holder |
S15 | Fuse in relay plate fuse holder |
S236 | Fuse in fuse holder |
S237 | Fuse in fuse holder (headlight washer system) |
S239 | Fuse in fuse holder |
S240 | Fuse in fuse holder |
T8 | 8-connector, black, radio connector III |
T8j | 8-pin connector, black, behind side trim on rear left |
610 | Earth point (audio), under centre console, front |
A34 | Connection (75x), in dash panel wiring harness |
A46 | Positive connection (30 - from radio), in dash panel wiring harness |
A50 | Positive connection (30as), in dash panel wiring harness |
A57 | Positive connection 3 (30), in dash panel wiring harness |
A129 | Connection (muting), in dash panel wiring harness |
A159 | Connection (L), in dash panel wiring harness |
* | for models with radio chorus, concert or symphony only |
** | for models with preparation for radio (trade product) only |
*** | For Avant models ⇒ see applicable Current Flow Diagram: Avant models, rear |
Wiring Diagram AUDI A4 2005 - Fuses - glove compartment light - footwell lights
E26 | Glove compartment light switch |
J393 | Convenience system central control unit |
S2 | Fuse in relay plate fuse holder |
T12d | 12-pin connector, brown, near glove compartment |
T12h | 12-pin connector, black, on convenience system central control unit (used to be connector 1) |
T12i | 12-pin connector, black, on convenience system central control unit (used to be connector 3) |
T16h | 16-pin connector, black, on convenience system central control unit (used to be connector 2) |
T16i | 16-pin connector, brown, on convenience system central control unit (used to be connector 5) |
T17d | 17-pin connector, red, coupling station on electronics box, plenum chamber |
W6 | Glove compartment light |
W9 | Left footwell light |
W10 | Right footwell light |
238 | Earth connection 1, in interior wiring harness |
A29 | Connection (interior light), in dash panel wiring harness |
A57 | Positive connection 3 (30), in dash panel wiring harness |
* | for models with key operated switch to deactivate airbag only |
** | for models with manual gearbox (not for all engine versions) only |
Wiring Diagram AUDI A4 2005 - Fuses - ashtray illumination - heated rear window - cigarette lighter - 12 V socket
C18 | Window aerial suppression filter |
J9 | Heated rear window relay |
J255 | Climatronic control unit |
L15 | Ashtray illumination bulb |
L28 | Cigarette lighter illumination bulb |
L42 | Socket illumination bulb |
S1 | Fuse in relay plate fuse holder |
S226 | Fuse in fuse holder |
S233 | Fuse in fuse holder |
S234 | Fuse in fuse holder |
U1 | Cigarette lighter |
U5 | 12 V socket |
Z1 | Heated rear window |
81 | Earth connection 1, in dash panel wiring harness |
135 | Earth connection 2, in dash panel wiring harness |
238 | Earth connection 1, in interior wiring harness |
653 | Earth point, left D-pillar |
654 | Earth point, right D-pillar |
A57 | Positive connection 3 (30), in dash panel wiring harness |
B248 | Connection 2 (heated rear window), in interior wiring harness |
* | For Avant models ⇒ see applicable Current Flow Diagram: Avant models, rear |
** | for models without 12 V socket only |
*** | for models with 12 V socket only |
**** | for models with 12 V socket only (phased-in modification) |
***** | Cross-section 2.5 possible |
# | fuse was modified from 15 A/ 30 A to 20 A (phased-in modification) |
Wiring Diagram AUDI A4 2005 - Fuses - reversing light switch - electric socket - washer jet heater element
F4 | Reversing light switch |
G70 | Air mass meter |
S3 | Fuse in relay plate fuse holder |
S5 | Fuse in relay plate fuse holder |
S231 | Fuse in fuse holder |
S235 | Fuse in fuse holder |
T10c | 10-pin connector, violet, coupling station on left of A-pillar |
T17e | 17-pin connector, white, coupling station on electronics box, plenum chamber |
U | Electric socket |
Z20 | Left washer jet heater element |
Z21 | Right washer jet heater element |
249 | Earth connection 2, in interior wiring harness |
261 | Earth connection, in heated washer jet wiring harness |
A52 | Positive connection 2 (30), in dash panel wiring harness |
A70 | Connection (15a, fuse 231), in dash panel wiring harness |
A74 | Connection (15a, fuse 5), in dash panel wiring harness |
D51 | Positive connection 1 (15), in engine compartment wiring harness |
* | for models with washer jet heater element only |
** | for models with 5-speed manual gearbox (not for all engine versions) only |
*** | for models with 6-speed manual gearbox (not for all engine versions) only |
**** | Not applicable for all engine versions, ⇒ applicable engine Current Flow Diagram |
***** | fuse was modified from 30 A to 20 A (phased-in modification) |
Wiring Diagram AUDI A4 2005 - Fuel gauge sender - ambient temperature switch - coolant temperature display sender - coolant shortage indicator switch
D2 | Immobilizer reader coil |
F38 | Ambient temperature switch |
F66 | Coolant shortage indicator switch |
F77 | Washer fluid warning contact |
G | Fuel gauge sender |
G1 | Fuel gauge |
G2 | Coolant temperature display sender |
G3 | Coolant temperature gauge |
G169 | Fuel gauge sender 2 |
J285 | Control unit in dash panel insert |
T10d | 10-pin connector, grey, coupling station on left of A-pillar |
T14 | 14-pin connector, black, on left in engine compartment |
T17 | 17-pin connector, black, coupling station on left of A-pillar |
T17d | 17-pin connector, red, coupling station on electronics box, plenum chamber |
T17e | 17-pin connector, white, coupling station on electronics box, plenum chamber |
T32 | 32-pin connector, blue, on dash panel insert |
269 | Earth connection (sender earth) 1, in dash panel wiring harness |
327 | Earth connection (sender earth), in engine compartment wiring harness |
* | for models with four-wheel drive only |
** | Output for signal earth |
*** | Not applicable for all engine versions, ⇒ applicable engine Current Flow Diagram |
**** | For highline equipment only |
Wiring Diagram AUDI A4 2005 - Control unit in dash panel insert - brake fluid level warning contact - oil pressure switch
C | Alternator |
F1 | Oil pressure switch |
F34 | Brake fluid level warning contact |
G5 | Rev. counter |
J234 | Airbag control unit |
J285 | Control unit in dash panel insert |
J623 | Engine control unit |
K2 | Alternator warning lamp |
K75 | Airbag warning lamp |
T10c | 10-pin connector, violet, coupling station on left of A-pillar |
T17d | 17-pin connector, red, coupling station on electronics box, plenum chamber |
T17e | 17-pin connector, white, coupling station on electronics box, plenum chamber |
T32a | 32-pin connector, green, on dash panel insert |
261 | Earth connection, in heated washer jet wiring harness |
A17 | Connection (61), in dash panel wiring harness |
A121 | Connection (high bus), in dash panel wiring harness |
A122 | Connection (low bus), in dash panel wiring harness |
D66 | Positive connection (61), in engine compartment wiring harness |
* | ⇒ applicable engine Current Flow Diagram |
Wiring Diagram AUDI A4 2005 - Control unit in dash panel insert - dash panel vent illumination - radio controlled clock
J285 | Control unit in dash panel insert |
J489 | Radio controlled clock receiver |
L50 | Rear centre ashtray illumination bulb |
L67 | Dash panel left vent illumination bulb |
L68 | Dash panel central vent illumination bulb |
L69 | Dash panel right vent illumination bulb |
L120 | Storage compartment illumination bulb |
L121 | Cup holder illumination bulb |
L122 | Coin holder illumination bulb |
T4m | 4-pin connector, black, on dash panel insert |
T32a | 32-pin connector, green, on dash panel insert |
Y8 | Radio controlled clock |
81 | Earth connection 1, in dash panel wiring harness |
238 | Earth connection 1, in interior wiring harness |
A175 | Connection (58s), in dash panel wiring harness |
* | depends on equipment |
** | Not for models with front parking aid |
*** | for models without 12 V socket only |
**** | for models with 12 V socket only |
Wiring Diagram AUDI A4 2005 - Control unit in dash panel insert - diagnostic connector
G21 | Speedometer |
J104 | ABS control unit |
J285 | Control unit in dash panel insert |
L157 | Illuminated centre armrest |
T16 | 16-pin connector, black, diagnostic connector |
T17b | 17-pin connector, green, coupling station on left of A-pillar |
T32a | 32-pin connector, green, on dash panel insert |
135 | Earth connection 2, in dash panel wiring harness |
238 | Earth connection 1, in interior wiring harness |
A27 | Connection (speed signal), in dash panel wiring harness |
A76 | Connection (diagnosis wire K), in dash panel wiring harness |
A175 | Connection (58s), in dash panel wiring harness |
** | for models with centre armrest only |
Wiring Diagram AUDI A4 2005 - Control unit in dash panel insert - brake pad wear sender - bonnet contact switch - oil level and oil temperature sender
F266 | Bonnet contact switch |
G34 | Front left brake pad wear sender |
G35 | Front right brake pad wear sender |
G266 | Oil level and oil temperature sender |
J285 | Control unit in dash panel insert |
J393 | Convenience system central control unit |
T4n | 4-pin connector, black, front left |
T4o | 4-pin connector, black, front right |
T10d | 10-pin connector, grey, coupling station on left of A-pillar |
T14 | 14-pin connector, black, on left in engine compartment |
T17b | 17-pin connector, green, coupling station on left of A-pillar |
T17e | 17-pin connector, white, coupling station on electronics box, plenum chamber |
T20g | 20-pin connector, red, on convenience system central control unit (used to be connector 4) |
T32 | 32-pin connector, blue, on dash panel insert |
T32a | 32-pin connector, green, on dash panel insert |
12 | Earth point, on left in engine compartment |
83 | Earth connection 1, in front right wiring harness |
179 | Earth connection, in left headlight wiring harness |
AUDI A4 2005
AUDI A4 2005 Overview of earth points in engine compartment
1 - | Earth point, in battery box -11- |
q | Location ⇒ page → 801/6 |
2 - | Earth point, starter battery -624- |
q | Location → page 801/11 |
3 - | Earth point, on left in engine compartment -12- |
q | not for 2,0 l engine FSI, not for 2,5 l engine TDI, location → page 801/6 |
q | only for 2.0 l FSI motor, location → page 801/7 |
q | only for 2,5 l engine TDI, location → page 801/7 |
4 - | Earth point, on front apron -26- |
q | Location → page 801/10 |
5 - | Earth point, near coil -19- |
q | Location → page 801/10 |
6 - | Earth point, on engine block -18- |
q | only for 1.8 l engine, location → page 801/8 |
q | only for 2.0 l FSI motor, location → page 801/9 |
q | only for 3.0 l engine, location → page 801/9 |
Audi A4 | Fitting Locations | No. 801 / 2 |
Overview of earth points in vehicle interior |
1 - | Earth point, lower part of right A-pillar -43- |
q | Location → page 801/13 |
2 - | Earth point, on right behind dash panel -33- |
q | Location → page 801/12 |
3 - | Earth point (audio), under centre console, front -610- |
q | Location → page 801/15 |
4 - | Earth point, lower part of right B-pillar -78- |
q | Location → page 801/15 |
5 - | Earth point, lower part of left B-pillar -77- |
q | Location → page 801/14 |
6 - | Earth point, near convenience system central control unit -49- |
q | Location → page 801/14 |
Audi A4 | Fitting Locations | No. 801 / 3 |
7 - | Earth point, lower part of left A-pillar -44- |
q | Location → page 801/13 |
8 - | Earth point, on left behind dash panel -32- |
q | Location → page 801/12 |
Audi A4 | Fitting Locations | No. 801 / 4 |
Note:
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1 - | Earth point, right D-pillar -654- |
q | Location → page 801/17 |
2 - | Earth point in luggage compartment -701- |
q | Location → page 801/17 |
3 - | Earth point, left D-pillar -653- |
q | Location → page 801/16 |
4 - | Earth point, on left in luggage compartment -50- |
q | Location → page 801/16 |
Audi A4 | Fitting Locations | No. 801 / 5 |
Overview of earth points in luggage compartment - Avant models |
1 - | Earth point, right D-pillar -654- |
q | Location → page 801/20 |
2 - | Earth point, on right in rear lid -53- |
q | Location → page 801/19 |
3 - | Earth point, left D-pillar -653- |
q | Location → page 801/20 |
4 - | Earth point, on left in rear lid -52- |
q | Location → page 801/19 |
5 - | Earth point, on left in luggage compartment -50- |
q | Location → page 801/18 |
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