AUDI A3 2005 – Body electrical . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2005 - Earth connections

10	Earth point, in plenum chamber
11	Earth point, in battery box
12	Earth point, in engine compartment, left
30	Earth point -1-, next to relay plate
43	Earth point, lower part of right A pillar
85	Earth connection -1-, in engine compartment wiring harness
156	Earth connection, in diesel direct injection wiring harness
162	Earth connection, in blower motor wiring harness
277	Earth connection -3-, in interior wiring harness
280	Earth connection, in communication systems wiring harness
285	Earth connection -7-, in interior wiring harness
288	Earth connection (headlight range control), in dash panel wiring harness

Wiring Diagram AUDI A3 2005 - Earth connections - battery - main fuse box - alternator

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
J17	Fuel pump relay
S131	Fuse 1
S132	Fuse 2
S133	Fuse 3
S134	Fuse 4
S138	Fuse 5
S162	Fuse -1- (30), in fuse box/battery
S163	Fuse -2- (30), in fuse box/battery
S164	Fuse -3- (30), in fuse box/battery
T2f	2-pin connector, alternator, in engine compartment, left
T3e	3-pin connector, black, on main fuse box
T4b	4-pin connector, in engine compartment, left
2	Earth strap, gearbox - body
12	Earth point, in engine compartment, left
45	Earth point, behind dash panel - centre
50	Earth point, luggage compartment, left
238	Earth connection -1-, in interior wiring harness
255	Earth connection -1-, in radio wiring harness
*	Models without air conditioner
**	Models with air conditioner

Wiring Diagram AUDI A3 2005 - Earth connections - ignition/starter switch - X contact relief relay - starter inhibitor and reversing light relay

D	Ignition/starter switch
J17	Fuel pump relay
J59	X contact relief relay
J226	Starter inhibitor and reversing light relay
T6m	6-pin connector, brown, in plenum chamber
T10x	10-pin connector, orange, in plenum chamber
T14	14-pin connector, in engine compartment, left
10	Earth point, in plenum chamber
281	Earth connection -1-, in engine prewiring wiring harness
A2	Positive (+) connection (15), in dash panel wiring harness
B138	Positive (+) connection (X), in interior wiring harness
B156	Positive (+) connection (30a), in interior wiring harness
B239	Positive (+) connection -1- (50), in interior wiring harness
*	Only models with manual gearbox
**	Only models with automatic gearbox

Wiring Diagram AUDI A3 2005 - Lighting switch - left steering column switch

E1	Lighting switch
E2	Turn signal switch
E4	Headlight dipper/flasher switch
E18	Rear fog light switch
E19	Parking light switch
L9	Lighting switch light bulb
L40	Front and rear fog light switch illumination bulb
42	Earth point, next to steering column
249	Earth connection -2-, in interior wiring harness
277	Earth connection -3-, in interior wiring harness
A3	Positive (+) connection (58), in dash panel wiring harness
A88	Connection (NSL (rear fog light)), in dash panel wiring harness

Wiring Diagram AUDI A3 2005 - Switches and instruments - lighting control - windscreen washer/wiper system - headlight range control (does not apply to headlights with gas discharge lamps)

E20	Switches and instruments, lighting control
E102	Headlight range control adjuster
J31	Automatic intermittent wash/wipe relay
L54	Headlight range control adjuster light bulb
V	Windscreen wiper motor
V48	Headlight range control motor, left
V49	Headlight range control motor, right
249	Earth connection -2-, in interior wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
280	Earth connection, in communication systems wiring harness
288	Earth connection (headlight range control), in dash panel wiring harness
A27	Connection (speed signal), in dash panel wiring harness
A103	Connection -2- (56), in dash panel wiring harness
A114	Connection (headlight range control), in dash panel wiring harness

Wiring Diagram AUDI A3 2005 - Right steering column switch - windscreen washer/wiper system - rear window wiper

E22	Intermittent wiper switch
E34	Rear wiper switch
E38	Intermittent wiper control
J30	Rear window wiper/washer relay
J31	Automatic intermittent wash/wipe relay
T6d	6-pin connector, brown, behind steering column switch trim
T8g	8-pin connector, brown, in luggage compartment, left
V5	Windscreen washer pump
V12	Rear window wiper motor
50	Earth point, luggage compartment, left
98	Earth connection, in tailgate wiring harness
249	Earth connection -2-, in interior wiring harness
A97	Connection (53), in dash panel wiring harness
A102	Connection (windscreen wiper), in dash panel wiring harness

Wiring Diagram AUDI A3 2005 - Tail lights - brake lights - reversing lights - rear fog light

F	Brake light switch
F4	Reversing light switch
L46	Rear fog light bulb, left
M2	Tail light bulb, right
M4	Tail light bulb, left
M6	Turn signal bulb, rear left
M8	Turn signal bulb, rear right
M9	Brake light bulb, left
M10	Brake light bulb, right
M16	Reversing light bulb, left
M17	Reversing light bulb, right
M25	High level brake light bulb
T5h	5-pin connector, brown, A pillar, left, near relay plate
T8g	8-pin connector, brown, in luggage compartment, left
T10x	10-pin connector, orange, in plenum chamber
98	Earth connection, in tailgate wiring harness
238	Earth connection -1-, in interior wiring harness
A87	Connection (RF (reversing light)), in dash panel wiring harness
B131	Connection (54), in interior wiring harness
B185	Connection -2- (54), in interior wiring harness
*	Only models with manual gearbox
**	Does not apply to models with electronic stability program

Wiring Diagram AUDI A3 2005 - Horn - cigarette lighter - ashtray light bulb - illumination for dash panel vents - heater element for left and right washer jet

E221	Operating unit in steering wheel
F138	Airbag coil connector, return spring with slip ring
H	Horn plate
H2	High tone horn
H7	Low tone horn
J4	Dual tone horn relay
L15	Ashtray light bulb
L67	Dash panel left vent illumination
L68	Dash panel central vent illumination
L69	Dash panel right vent illumination
T2	2-pin connector, heated washer jet, in plenum chamber, right
T2h	2-pin connector, heated washer jet, in plenum chamber, right
T5a	5-pin connector, yellow, vehicle interior, at steering column
T5c	5-pin connector, yellow, vehicle interior, in steering wheel
U1	Cigarette lighter
Z20	Heater element, left washer jet
Z21	Heater element, right washer jet
277	Earth connection -3-, in interior wiring harness
280	Earth connection, in communication systems wiring harness
A72	Connection (71), in dash panel wiring harness
A81	Connection -2- (X), in dash panel wiring harness
B145	Positive (+) connection (58b), in interior wiring harness

Wiring Diagram AUDI A3 2005 - Fuses

E87	Control and display unit for air conditioner/Climatronic
S1	Fuse in fuse box/relay plate
S2	Fuse in fuse box/relay plate
S5	Fuse in fuse box/relay plate
S6	Fuse in fuse box/relay plate
S7	Fuse in fuse box/relay plate
S224	Fuse in fuse box
S225	Fuse in fuse box
S226	Fuse in fuse box
S227	Fuse in fuse box
S231	Fuse in fuse box
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
L59	Positive (+) connection (30), in heater unit wiring harness
*	Models with air conditioner

Wiring Diagram AUDI A3 2005 - Fuses - headlights

L1	Twin filament bulb/sealed beam insert, left
L2	Twin filament bulb/sealed beam insert, right
M1	Side light bulb, left
M3	Side light bulb, right
S18	Fuse in fuse box/relay plate
S19	Fuse in fuse box/relay plate
S20	Fuse in fuse box/relay plate
S21	Fuse in fuse box/relay plate
S22	Fuse in fuse box/relay plate
S223	Fuse in fuse box
T4j	4-pin connector, headlight, left
T4l	4-pin connector, headlight, right
280	Earth connection, in communication systems wiring harness
A51	Connection (56), in dash panel wiring harness
B142	Positive (+) connection -2- (56a), in interior wiring harness
B143	Positive (+) connection (58R), in interior wiring harness
B144	Positive (+) connection (58L), in interior wiring harness

Wiring Diagram AUDI A3 2005 - Fuses - diagnostic connector - provision for radio

E150	Interior locking switch, driver's side
S12	Fuse in fuse box/relay plate
S13	Fuse in fuse box/relay plate
S14	Fuse in fuse box/relay plate
S15	Fuse in fuse box/relay plate
S238	Fuse in fuse box
S239	Fuse in fuse box
S240	Fuse in fuse box
S241	Fuse in fuse box
S242	Fuse in fuse box
T8	8-pin connector, on radio
T10d	10-pin connector, brown, connector carrier, A pillar, left
T16	16-pin connector, black, centre console compartment (diagnostic connector)
255	Earth connection -1-, in radio wiring harness
277	Earth connection -3-, in interior wiring harness
A1	Positive (+) connection (30a), 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
B115	Positive (+) connection (30, central electrics), in interior wiring harness
B150	Positive (+) connection -2- (30a), in interior wiring harness
*	See applicable Current Flow Diagram: Radio

Wiring Diagram AUDI A3 2005 - Fuses - glove box light - number plate light

S3	Fuse in fuse box/relay plate
S4	Fuse in fuse box/relay plate
S10	Fuse in fuse box/relay plate
S11	Fuse in fuse box/relay plate
S236	Fuse in fuse box
T2a	2-pin connector, black, behind right side of dash panel
T2c	2-pin connector, black, in rear lid, right
T2d	2-pin connector, black, in rear lid, left
T6a	6-pin connector, black, in luggage compartment, left
W6	Glove box light
X	Number plate light
98	Earth connection, in rear lid wiring harness
277	Earth connection -3-, in interior wiring harness
A21	Connection (86s), in dash panel wiring harness
A23	Connection (30al), in dash panel wiring harness
B117	Connection (58a, right), in interior wiring harness
*	Only applies to diesel engines with manual gearbox

Wiring Diagram AUDI A3 2005 - Turn signals and hazard warning lights

E3	Hazard warning light switch
J2	Hazard warning light relay
J234	Airbag control unit
M5	Turn signal bulb, front left
M7	Turn signal bulb, front right
M18	Side turn signal bulb, left
M19	Side turn signal bulb, right
T10	10-pin connector, white, in plenum chamber
T16	16-pin connector, black, centre console compartment (diagnostic connector)
277	Earth connection -3-, in interior wiring harness
280	Earth connection, in communication systems wiring harness
A125	Connection (crash signal), in dash panel wiring harness
B149	Positive (+) connection -2- (15a), in interior wiring harness
B152	Connection (BL (turn signal, left)), in interior wiring harness
B153	Connection (BR (turn signal, right)), in interior wiring harness
*	Only models with manual gearbox
**	Only models with automatic gearbox

Wiring Diagram AUDI A3 2005 - Right footwell light - door contact switches - central locking motor

F3	Door contact switch, front passenger's side
F10	Rear left door contact switch
F11	Rear right door contact switch
T3k	3-pin connector, black, vehicle interior, in front passenger's door
T5i	5-pin connector, black, A pillar, left, near relay plate
T10f	10-pin connector, brown, connector carrier, A pillar, right
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
W10	Right footwell light
206	Earth connection, in door wiring harness - front passenger's side
*	Only on 4-door models

Wiring Diagram AUDI A3 2005 - Luggage compartment lights - door contact switch - central locking motor - left footwell light

F2	Door contact switch, driver's side
T3h	3-pin connector, black, vehicle interior, in driver's door
T6a	6-pin connector, black, in luggage compartment, left
T10d	10-pin connector, brown, connector carrier, A pillar, left
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
W9	Left footwell light
W18	Luggage compartment light, left
W35	Luggage compartment light, right
98	Earth connection, in tailgate wiring harness
205	Earth connection, in door wiring harness - driver's side
238	Earth connection -1-, in interior wiring harness
B155	Connection -2- (TK (door contact)), in interior wiring harness

Wiring Diagram AUDI A3 2005 - Fresh air blower (models without air conditioner) - heated rear window

E9	Fresh air blower switch
E15	Heated rear window switch
E159	Fresh air/air recirculating flap switch
J9	Heated rear window relay
N206	Warm air blower series resistor with overheating fuse
T6a	6-pin connector, black, in luggage compartment, left
V2	Fresh air blower
V154	Fresh/recirculating air flap control motor
Z1	Heated rear window
98	Earth connection, in tailgate wiring harness
162	Earth connection, in blower motor wiring harness
A82	Connection (windscreen heater), in dash panel wiring harness
B135	Connection -1- (15a), in interior wiring harness
L66	Connection, in heater blower wiring harness

Wiring Diagram AUDI A3 2005 - Combi-processor in dash panel insert - handbrake warning switch - warning lamps

F9	Handbrake warning switch
J218	Combi-processor in dash panel insert
K1	Main beam warning lamp
K2	Alternator warning lamp
K14	Handbrake warning lamp
K18	Trailer operation warning lamp
K29	Glow period warning lamp
K65	Left turn signal warning lamp
K86	Traction control system warning lamp
K94	Right turn signal warning lamp
K132	Electronic power control fault lamp
K134	Self-levelling suspension warning lamp
K149	Engine electronics warning lamp
T10	10-pin connector, white, in plenum chamber
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
277	Earth connection -3-, in interior wiring harness
A24	Connection (brake system monitoring), in dash panel wiring harness
*	Only models with petrol engines
**	Only models with diesel engines

Wiring Diagram AUDI A3 2005 - Combi-processor in dash panel insert - ABS with EDL control unit - control and display unit for air conditioner - fuel gauge - coolant temperature gauge

E87	Control and display unit for air conditioner/Climatronic
G1	Fuel gauge
G3	Coolant temperature gauge
G5	Rev. counter
G17	Ambient temperature sensor
G21	Speedometer
H3	Buzzer/gong
J104	ABS with EDL control unit
J218	Combi-processor in dash panel insert
J234	Airbag control unit
K47	ABS warning lamp
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
Y	Analogue clock
269	Earth connection (sender earth) -1-, in dash panel wiring harness
A76	Connection (diagnosis wire K), in dash panel wiring harness
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
A132	Connection (TCS/ESP), in dash panel wiring harness
B116	Connection (58d), in interior wiring harness
*	Only models with air conditioner
**	Does not apply to models with air conditioner

Wiring Diagram AUDI A3 2005 - Immobilizer reading coil - warning lamps - belt switch - coolant shortage indicator switch - brake lining/pad wear sender

D2	Immobilizer reading coil
E24	Belt switch, driver's side
F34	Brake fluid level warning contact
G34	Brake lining/pad wear sender, front left
F66	Coolant shortage indicator switch
J218	Combi-processor in dash panel insert
K3	Oil pressure warning lamp
K4	Side light warning lamp
K16	Reserve fuel warning lamp
K19	Seat belt warning system warning lamp
K28	Coolant temperature/coolant shortage warning lamp
K32	Brake pad/lining warning lamp
K33	Brake fluid level warning lamp
K37	Windscreen washer fluid level warning lamp
K75	Airbag warning lamp
K102	Rear lid closed warning lamp
K117	Immobilizer warning lamp
K149	Engine electronics warning lamp
T6l	6-pin connector, red, under driver's seat
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
249	Earth connection -2-, in interior wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
280	Earth connection, in communication systems wiring harness
*	Only models with belt warning

Wiring Diagram AUDI A3 2005 - Combi-processor in dash panel insert - oil level/oil temperature sender - oil pressure switch

F1	Oil pressure switch
F111	Rear lid contact switch
F120	Anti-theft alarm/vermin repellent system contact switch
G266	Oil level/oil temperature sender
J218	Combi-processor in dash panel insert
T6a	6-pin connector, black, in luggage compartment, left
T14	14-pin connector, in engine compartment, left
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
10	Earth point, in plenum chamber
98	Earth connection, in rear lid wiring harness
280	Earth connection, in communication systems wiring harness
281	Earth connection -1-, in engine wiring harness
A80	Connection -1- (X), in dash panel wiring harness
B175	Connection (central locking), in interior wiring harness
B214	Connection -1- (central locking), in interior wiring harness
*	Only applies to diesel engines with manual gearbox and petrol engines with automatic gearbox and manual gearbox
**	Only applies to diesel engines with automatic gearbox