Wiring Diagram AUDI A4 2003 - Wiring harness for second battery
A1 | Second battery |
J7 | Battery isolation relay |
S65 | Second battery fuse |
S171 | Battery isolation relay fuse |
T2 | 2-pin connector, black, engine compartment, right |
T6f | 6-pin connector, light pink, connector point, A pillar, left |
T10 | 10-pin connector, black, connector point, electronics box, plenum chamber |
U19 | 12 V socket -3- |
U20 | 12 V socket -4- |
32 | Earth point, behind dash panel, left |
33 | Earth point, behind dash panel, right |
49 | Earth point, near convenience system central control unit |
81 | Earth connection -1-, in dash panel wiring harness |
238 | Earth connection -1-, in interior wiring harness |
501 | Screw connection -2- (30), on relay plate |
A17 | Connection (61), in dash panel wiring harness |
A52 | Positive (+) connection -2- (30), in dash panel wiring harness |
A98 | Positive (+) connection -4- (30), in dash panel wiring harness |
P3 | Positive (+) connection (30), in second battery wiring harness |
* | Only applies to models with second battery |
** | Only applies to models without second battery |
Wiring Diagram AUDI A4 2003 - Fuses - two-way radio - sockets
E72 | Two-way radio switch |
J608 | Special vehicle control unit |
R8 | Two-way radio |
S291 | Special vehicle fuse -1- |
S292 | Special vehicle fuse -2- |
S293 | Special vehicle fuse -3- |
S297 | Special vehicle fuse -7- |
U5 | 12 V socket |
U18 | 12 V socket -2- |
81 | Earth connection -1-, in dash panel wiring harness |
238 | Earth connection -1-, in interior wiring harness |
B252 | Positive (+) connection (30, police), in interior wiring harness |
B253 | Positive (+) connection -1- (30a, police), in interior wiring harness |
B255 | Positive (+) connection -3- (30a, police), in interior wiring harness |
B258 | Positive (+) connection -3- (30a, police), in interior wiring harness |
Wiring Diagram AUDI A4 2003 - Weapons storage box - fuses
E368 | Weapons storage box button |
J59 | X contact relief relay |
J519 | Onboard power supply control unit |
S294 | Special vehicle fuse -4- |
S295 | Special vehicle fuse -5- |
S296 | Special vehicle fuse -6- |
T32b | 32-pin connector, grey, on onboard power supply control unit |
V247 | Weapons storage box release motor |
238 | Earth connection -1-, in interior wiring harness |
A34 | Connection (75x), in dash panel wiring harness |
A57 | Positive (+) connection -3- (30), in dash panel wiring harness |
B254 | Positive (+) connection -2- (30a, police), in interior wiring harness |
B256 | Positive (+) connection (75x, police), in interior wiring harness |
* | Only applicable for German regular police, special police |
** | Near dual tone horn relay, integrated in wiring harness |
Wiring Diagram AUDI A4 2003 - Flashing blue light relay (rear lid) - transformer with socket (12 V to 220 V)
J617 | Flashing blue light relay |
T1b | Single connector, brown |
T4x | 4-pin connector, black, for flashing lights, in luggage compartment |
U13 | Transformer with socket (12 V - 220 V) |
81 | Earth connection -1-, in dash panel wiring harness |
Wiring Diagram AUDI A4 2003 - Flashing yellow lights - in rear lid
F123 | Tailgate/boot lid contact switch for anti-theft alarm |
J29 | Diode |
J519 | Onboard power supply control unit |
J618 | Flashing amber light relay -1- |
J619 | Flashing amber light relay -2- |
L142 | Flashing light -1-, yellow |
L143 | Flashing light -2-, yellow |
T4x | 4-pin connector, black, for flashing lights, in luggage compartment |
T23 | 23-pin connector, black, on onboard power supply control unit |
T32b | 32-pin connector, grey, on onboard power supply control unit |
81 | Earth connection -1-, in dash panel wiring harness |
86 | Earth connection -1-, in rear wiring harness |
218 | Earth connection -1-, in tailgate/boot lid wiring harness |
A5 | Positive (+) connection (right turn signal), in dash panel wiring harness |
A6 | Positive (+) connection (left turn signal), in dash panel wiring harness |
A90 | Connection (dual tone horn), in dash panel wiring harness |
B154 | Connection -1- (TK (door contact)), in interior wiring harness |
Wiring Diagram AUDI A4 2003 - Tachograph
G394 | Tachograph pulse sender |
J104 | ABS with EDL control unit |
J285 | Control unit with display in dash panel insert |
J620 | Tachograph isolation relay |
J621 | Tachograph control unit |
J622 | Impulse distributor control unit |
T10u | 10-pin connector, dark brown, near tachograph |
T17b | 17-pin connector, green, connector point, A pillar, left |
T32a | 32-pin connector, green, on dash panel insert |
238 | Earth connection -1-, in interior wiring harness |
A27 | Connection (speed signal), in dash panel wiring harness |
A175 | Connection (58s), in dash panel wiring harness |
Wiring Diagram AUDI A4 2003 - Main beam headlight alarm system
J182 | Flasher relay for main beam headlight alarm system |
J330 | Main beam relay |
J519 | Onboard power supply control unit |
M30 | Main beam bulb, left |
M32 | Main beam bulb, right |
T32b | 32-pin connector, grey, on onboard power supply control unit |
81 | Earth connection -1-, in dash panel wiring harness |
A3 | Positive (+) connection (58), in dash panel wiring harness |
E116 | Connection (56a, right), in dash panel wiring harness |
E117 | Connection (56a, left), in dash panel wiring harness |
Wiring Diagram AUDI A4 2003 - Siren system
E75 | Alarm system switch |
H24 | Power horn -1- |
H25 | Power horn -2- |
J408 | Siren system relay |
L139 | Magnetic flashing light |
T10q | 10-pin connector, purple, connector point, A pillar, right |
T10t | 10-pin connector, purple, in centre console |
81 | Earth connection -1-, in dash panel wiring harness |
238 | Earth connection -1-, in interior wiring harness |
B257 | Positive (+) connection (84b, police), in interior wiring harness |
Wiring Diagram AUDI A4 2003 - Connection for roof signal system
T10r | 10-pin connector, brown, connector point, A pillar, right, roof signal system interface |
* | Connection for roof signal system |
AUDI A4 2003
AUDI A4 2003 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 |
Audi A4 | Fitting Locations | No. 801 / 6 |
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Audi A4 | Fitting Locations | No. 801 / 10 |
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