All Wiring Diagrams for Audi A4 Quattro 2003 model

AIR CONDITIONING

Air Conditioning Wiring Diagram (1 of 2) for Audi A4 Quattro 2003

List of elements for Air Conditioning Wiring Diagram (1 of 2) for Audi A4 Quattro 2003:

• (behind left kick panel) g44
• (behind left side of dash) g49 (w/ convert)
• (behind right kick panel) g43 (w/o convert)
• (left center of fire- wall) g12
• 13a
• 25a
• 26a
• 44a
• A/c compressor regulator valve
• A/c control head
• Acc
• Computer data lines system
• Defogger system
• Fresh air blower control module (behind right end of dash)
• Fuse 10a
• Fuse 30a
• Fuse 5a
• Fuse holder
• Hot at all times
• Hot in run or start
• Ignition/ starter switch
• Left vent temperature sensor (behind left end of dash, in air duct)
• Off
• Right vent temperature sensor (behind right end of dash, in air duct)
• Run
• Seats system
• Solar cells
• Start
• W/o convert
• W/o convertible

Air Conditioning Wiring Diagram (2 of 2) for Audi A4 Quattro 2003

List of elements for Air Conditioning Wiring Diagram (2 of 2) for Audi A4 Quattro 2003:

• (behind left side of dash) g49 (w/ convert)
• (behind right kick panel) g43 (w/o convert)
• (left center of fire- wall)
• Air conditioning controls
• Air flow flap motor/ position sensor
• Air quality sensor (right rear of eng compt)
• Airbag spiral spring/ return spring w/ slip ring
• Central air flap motor/ position sensor
• Computer data lines system
• Defroster flap motor/ position sensor
• Evaporator vent temperature sensor (behind right end of dash)
• Fresh air intake duct temperature sensor (behind right end of dash)
• G12
• High pressure sensor
• Left footwell vent temperature sensor (below center of dash)
• Left temperature flap actuator/ potentiometer
• Recirculation flap motor/ position sensor
• Right footwell vent temperature sensor (below center of dash)
• Right temperature flap actuator/ potentiometer
• Steering column electronic systems control module (at top of steering column)
• Steering wheel control unit
• Sunlight photo sensor (on top center of dash)
• T16a

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram for Audi A4 Quattro 2003

List of elements for Anti-lock Brakes Wiring Diagram for Audi A4 Quattro 2003:

• (behind right kick panel) (w/o convertible) g43
• (except quattro)
• (on left of firewall, near coolant reservoir)
• (quattro)
• (w/ convertible) g49 (behind left side of dash)
• 13a
• 14a
• 42a
• Abs control module (on left rear of engine compt)
• Abs control module fuse 1
• Abs return flow pump
• Acc
• Anti-slip control switch
• Anti-theft system
• Brake light switch (above brake pedal, on bracket)
• Data link connector (dlc)
• Except quattro
• Fuse 10a
• Fuse 25a
• Fuse 50a
• Fuse holder
• G12
• G43 (w/o convertible) (behind right kick panel)
• High pressure switch valve 1
• High pressure switch valve 2
• Hot at all times
• Hot in on or start
• Ignition/ starter switch
• Instrument cluster
• Instrument cluster system
• Interior lights system
• Left front abs inlet valve
• Left front abs outlet valve
• Left front abs wheel speed sensor
• Left rear abs inlet valve
• Left rear abs outlet valve
• Left rear abs wheel speed sensor
• Navigation control module (w/o convertilbe) (at left rear of luggage compt)
• Nca
• Off
• Parking brake warning light switch
• Quattro
• Red
• Right front abs inlet valve
• Right front abs outlet valve
• Right front abs wheel speed sensor
• Right rear abs inlet valve
• Right rear abs outlet valve
• Right rear abs wheel speed sensor
• Rotation rate sender
• Run
• Start
• Steering angle sensor
• Steering angle sensor 1 (convertible) brake booster sender 1 (w/o convertilbe)
• Steering column electronic systems control module (in top of steering column)
• T16a
• T26
• T32
• T32a
• Traction control pilot valve 1
• Traction control pilot valve 2

ANTI-THEFT

Anti-theft Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Anti-theft Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• 24a
• 38a
• A66
• A76
• Alarm horn
• Anti-lock brakes system
• B154
• Backup lamps circuit
• Central locking/ anti-theft alarm system antenna
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Data link connector (dlc) (under left side of dash)
• Front hood switch
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G49 (behind left side of dash)
• G662 (left rear side of vehicle)
• G663 (right rear side of vehicle)
• Hot at all times
• Instrument cluster
• Nca
• Parking brake warning light switch
• T2s
• T32
• T32a
• T3f
• Trunk lid alarm switch
• Trunk lock alarm/central locking switch

Anti-theft Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for Anti-theft Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• 24a
• 38a
• A24
• A66
• A76
• Alarm horn
• Antenna suppression filter
• Anti-lock brakes system
• Anti-theft warning ultrasound sensor (at top center of roof, in interior light assembly)
• Avant only
• B154
• Backup lamps circuit
• Central locking/ anti-theft alarm system antenna
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Data link connector (dlc) (under left side of dash)
• Defogger system
• Front hood switch
• Fuse 15a
• Fuse 20a
• Fuse holder
• G12 (on left center of firewall, near coolant reservoir)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G50 (except avant) g52 (avant) (except avant-left side of luggage compt, avant-left rear trunk lid)
• G53 (right rear trunk lid)
• G78 (at base of right "b" pillar)
• Hot at all times
• Instrument cluster
• Left rear broken window glass sensor
• Nca
• Parking brake warning light switch
• Rear window defogger
• Right rear broken window glass sensor
• T32
• T32a
• Trunk lid alarm switch
• Trunk lock alarm/central locking switch

BODY CONTROL MODULES

Body Control Modules Wiring Diagram for Audi A4 Quattro 2003

List of elements for Body Control Modules Wiring Diagram for Audi A4 Quattro 2003:

• (behind left kick panel)
• 24a
• 38a
• Anti theft, anti-lock brakes systems
• Anti-theft system
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Convertible top control module (at right quarter panel, behind trim)
• Door locks system
• Door locks system (w/ convertible)
• Driver side door control module
• Exterior lights system
• Fuse 20a (w/o convertible) 15a (w/ convertible)
• Fuse 20a (w/o convertible) 30a (w/ convertible)
• Fuse holder
• G44
• Hot at all times
• Interior lights system
• Interior lights sytem
• Left rear door control module
• Nca
• Passenger side door control module
• Power tops system
• Right rear door control module
• Sound system
• Sunroof motor
• T10e
• T10f
• T10g
• T10h
• W/ convertible
• W/o convertible

COMPUTER DATA LINES

Data Link Connector Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Data Link Connector Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• (behind left side of dash)
• 12a
• 31a
• A/c control head
• Abs control module (on left side of eng compt)
• Air bag control module (below center console)
• Comfort system central control module (near base of left front seat)
• Control module for navigation w/ cd-mechanism (at left rear of luggage compt)
• Convertible top control module (at right quarterpanel, behind trim)
• Data link connector (under left side of dash)
• Fuse 10a
• Fuse 15a
• Fuse holder
• G49
• Headlight range control module (behind glove box)
• Hot in on or start
• Instrument cluster
• Left entry assistance control module (if equipped)
• Memory seat control module (under left front seat)
• Motronic engine control module (left rear of engine compt)
• Radio
• Right entry assistance control module (if equipped)
• T32a
• T32e
• T32g
• T32h
• T8e
• Transmision control module (left rear of engine compt)

Data Link Connector Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for Data Link Connector Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• (5-speed a/t)
• (behind right kick panel)
• (cvt)
• 12a
• 31a
• A/c control head
• Abs control module (on left side of eng compt)
• Air bag control module (below center console)
• Anti-theft warning ultra-sound sensor (in interior light assy)
• Comfort system central control module (near base of left front seat)
• Control module for navigation w/ cd-mechanism (at left rear of luggage compt)
• Data link connector (under left side of dash)
• Fuse 10a
• Fuse 15a
• Fuse holder
• G43
• Headlight range control module (behind glove box)
• Hot in on or start
• Instrument cluster
• Memory seat control module (under left front seat)
• Motronic engine control module (left rear of engine compt)
• Radio
• T32a
• T32e
• T42
• T8e
• Telephone/ telematic control module (base of right front seat)
• Transmision control module (left rear of engine compt)

High/Low Bus Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for High/Low Bus Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• A/c control head
• Abs control module (on left side of eng compt)
• Airbag control module (below center console)
• Comfort system central control module (near base of left front seat)
• Convertible top control module (at right quarterpanel, behind trim)
• Driver side door control module (integral w/ window regulator motor)
• Instrument cluster
• Left entry assistance control module (if equipped)
• Left rear window regulator motor
• Memory seat control module (under left front seat)
• Motronic engine control module (left rear of engine compt)
• Parking aid control module (at left rear of luggage compt)
• Passenger side door control module (integral w/ window regulator motor)
• Right entry assistance control module (if equipped)
• Right rear window regulator motor
• Steering column electronic systems control module (at top of steering column)
• T10e
• T10f
• T16a
• T32
• T32a
• T32b
• T32e
• T32h
• Towing sensor control module
• Vehicle electrical system control module (behind left side of dash)

High/Low Bus Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for High/Low Bus Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• (5 speed a/t)
• (cvt)
• A/c control head
• Abs control module (on left side of eng compt)
• Airbag control module (below center console)
• Comfort system central control module (near base of left front seat)
• Driver side door control module (integral w/ window regulator motor)
• Instrument cluster
• Left rear door control module (integral w/ window regulator motor)
• Memory seat control module (under left front seat)
• Motronic engine control module (left rear of engine compt)
• Passenger side door control module (integral w/ window regulator motor)
• Right rear door control module (integral w/ window regulator motor)
• Steering column electronic systems control module (at top of steering column)
• T10e
• T10f
• T10g
• T10h
• T16a
• T32
• T32a
• T32b
• T32e
• Transmission control module (left rear of engine compt)
• Vehicle electrical system control module (behind left side of dash)

COOLING FAN

Cooling Fan Wiring Diagram for Audi A4 Quattro 2003

List of elements for Cooling Fan Wiring Diagram for Audi A4 Quattro 2003:

• (1.8l)
• (3.0l)
• 4-pin relay carrier (behind left end of dash)
• Coolant fan fuse 42 40a (or 60a)
• Coolant fc (fan control) control module (on top of radiator fan shroud)
• Engine controls system
• Fuse 150a
• Fuse 5a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G26 (on left side of engine compt, under abs hydraulic unit)
• Hot at all times
• Motronic engine control module (ecm) (in plenum chamber e-box, at left rear of engine compartment)
• Red

CRUISE CONTROL

Cruise Control Wiring Diagram for Audi A4 Quattro 2003

List of elements for Cruise Control Wiring Diagram for Audi A4 Quattro 2003:

• (behind left side of dash) (w/ convertible) g49
• (w/o convertible) g43 (behind right kick panel)
• 13a
• Acc
• Acc run
• Brake- light switch
• Clutch vacuum vent valve switch (m/t)
• Computer data lines system
• Cruise control switch
• Fuse 10a
• Fuse panel
• Hot at all times
• Hot in run or start
• Ignition/ starter switch
• Motronic engine control module (left rear of engine compartment)
• Nca
• Off
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• T16a
• Throttle position (tp) sensor (above accelerator sensor)
• Throttle valve control module (on throttle body)

DEFOGGERS

Heated Mirrors Wiring Diagram for Audi A4 Quattro 2003

List of elements for Heated Mirrors Wiring Diagram for Audi A4 Quattro 2003:

• (behind left kick panel)
• (behind right kick panel)
• 22a
• A/c control head
• Computer data lines system
• Driver side door control module (integral with window regulator motor)
• Driver side outside mirror
• Fuse 15a
• Fuse holder
• G43
• G44
• Hot at all times
• Passenger side door control module (integral with window regulator motor)
• Passenger side outside mirror
• T10e
• T10f
• T16b
• T16c

Rear Defogger Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Rear Defogger Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• 26a
• A/c control head
• Convertible top control module (at right quarterpanel behind trim)
• Fuse 30a
• Fuse holder
• G662
• Heated rear window
• Hot at all times
• Nca
• W/ hardtop
• W/ soft top

Rear Defogger Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for Rear Defogger Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• (if equipped)
• 26a
• A/c control head
• Avant
• Except avant
• Fuse 30a
• Fuse holder
• G53 (right rear trunk lid)
• G73 (center rear of roof)
• Heated rear window
• Hot at all times
• Nca
• Rear window defogger w/ window antenna
• Sound systems
• Windshield antenna suppression filter

ELECTRONIC POWER STEERING

Electronic Power Steering Wiring Diagram for Audi A4 Quattro 2003

List of elements for Electronic Power Steering Wiring Diagram for Audi A4 Quattro 2003:

• Abs control module (left side of engine compt)
• Acc run
• G44 (w/ conv: behind left kick panel) (w/o conv: lower left "a" pillar)
• Hot at all times
• Ignition/ starter switch
• Instrument cluster
• Off
• Servotronic control module (on 9-pin relay carrier)
• Servotronic solenoid valve
• Start
• T32a
• W/o convertible

ENGINE PERFORMANCE

1.8L

1.8L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2003

List of elements for 1.8L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2003:

• (left rear of engine compt) e-box relay panel
• (left side of engine compt) g12
• Accelerator pedal position (app) sensor (above accelerator pedal)
• Brake- light switch
• Clutch vacuum vent valve switch (m/t) (above clutch pedal)
• Cooling fans system
• Fuse 10a
• Fuse 15a
• Fuse 40a
• Fuse panel
• G12 (left side of engine compt)
• Heated oxygen sensor (on exhaust system)
• Hot at all times
• Hot in run or start
• Ignition switch
• Mass airflow (maf) sensor (right side of engine compt)
• Motronic engine control module (in plenum chamber e-box)
• Off
• Oxygen sensor behind twc
• Red
• Run
• Secondary air injection (air) pump relay
• Secondary air injection pump motor
• Start
• Steering column electronic systems control module (top of steering column)
• T16a
• Transmission control module (in plenum chamber e-box)

1.8L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2003

List of elements for 1.8L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2003:

• (left front of engine compt) wastegate bypass regulator valve
• (right rear of engine compt) evaporative emission (evap) canister purge regulator valve
• Charge air pressure sensor (behind left headlight)
• Engine coolant temperature (ect) sensor (on radiator)
• Engine speed (rpm) sensor (on rear of engine)
• Fuse 15a
• Fuse holder
• Hot at all times
• Knock sensor (ks) 1 (left rear of engine)
• Knock sensor (ks) 2 (left front of engine)
• Leak detection pump (ldp) (left rear wheelwell)
• Map controlled engine cooling thermostat
• Nca
• Red
• Secondary air injection (air) solenoid valve (bottom of intake manifold)
• Turbocharger recirculating valve (bottom of intake manifold)

1.8L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2003

List of elements for 1.8L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2003:

• (left rear of engine compt) e-box relay carrier
• (left side of engine compt)
• (left side of engine compt) brake system vacuum pump
• (mil)
• (rear of cylinder head) engine coolant temperature (ect) sensor
• (right side of master cylinder) brake booster pressure sensor
• Brake booster relay
• Camshaft adjustment valve 1
• Camshaft position sensor (left front of cylinder head)
• Coil
• Data link connector
• Fuse 15a
• Fuse 20a
• Fuse holder
• G12
• G12 (left side of engine compt)
• G18 (on engine block)
• Instrument cluster
• Intake air temperature sensor (near throttle body)
• Malfunction indicator lamp
• Nca
• Red
• T32a/12
• T32a/13
• T32a/23
• To spark plug

1.8L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2003

List of elements for 1.8L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2003:

• 150a
• 9-pin relay carrier in instrument panel
• E-box relay carrier
• Fuel injectors
• Fuel pump motor
• Fuel pump relay
• Fuse 15a
• Fuse 20a
• Fuse holder
• G78 (lower right "b" pillar)
• Hot at all times
• Main fuse (on battery positive terminal)
• Motronic engine control module (left rear of engine compt)
• Red
• Relay plate
• Throttle valve control module (on throttle body)
• Transmission control module
• W/ cvt
• W/o cvt

3.0L

3.0L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (1 of 4) for Audi A4 Quattro 2003:

• (left rear of engine compt) e-box relay panel
• (left side of engine compt) g12
• Brake- light switch
• Clutch vacuum vent valve switch (m/t)
• Fuse 10a
• Fuse 15a
• Fuse 40a
• Fuse panel
• G12 (left side of engine compt)
• Heated oxygen sensor (on exhaust system)
• Heated oxygen sensor 2 (on exhaust system)
• Hot at all times
• Hot in run or start
• Ignition switch
• Mass airflow (maf) sensor (right rear of engine compt)
• Motronic engine control module (left rear of engine compt)
• Off
• Oxygen sensor 2 behind twc
• Oxygen sensor behind twc
• Red
• Run
• Secondary air injection (air) pump relay
• Secondary air injection pump motor
• Start
• Steering column electronic systems control module (top of steering column)
• T16a
• Throttle position (tp) sensor (above accelerator sensor)
• Trans- mission control module (left rear of eng compt)

3.0L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (2 of 4) for Audi A4 Quattro 2003:

• (behind right cyl head) engine coolant temperature (ect) sensor
• (front of intake manifold) intake manifold change-over valve
• (on e-box relay carrier) coolant circulation pump relay
• (right rear of engine compt) evaporative emission (evap) canister purge regulator valve
• After-run coolant pump
• Camshaft position sensor 2
• Camshaft position sensor 4 (rear of left cylinder head)
• Engine speed (rpm) sensor (left rear of engine)
• Fuse 15a
• Fuse holder
• G12 (left side of engine compt)
• Hot at all times
• Knock sensor (ks) 1 (under right side of intake)
• Knock sensor (ks) 2 (under left side of intake)
• Leak detection pump (ldp) (left rear wheelwell)
• Nca
• Red
• Secondary air injection (air) solenoid valve (top left rear of engine)

3.0L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (3 of 4) for Audi A4 Quattro 2003:

• (front of left cylinder head) camshaft adjustment valve 2
• (front of right cylinder head) camshaft adjustment valve 1
• (left rear of engine compt) e-box relay carrier
• (left side of engine compt)
• (left side of engine compt) brake system vacuum pump
• (mil)
• (right side of master cylinder) brake booster pressure sensor
• (under left side of dash) data link connector
• Brake booster relay
• Camshaft position sensor
• Camshaft position sensor 3
• Coil
• Fuse 15a
• Fuse 20a
• Fuse holder
• G12
• G12 (left side of engine compt)
• G18 (on engine block)
• Instrument cluster
• Malfunction indicator lamp
• Nca
• Red
• T32a/12
• T32a/13
• T32a/23
• To spark plug

3.0L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2003

List of elements for 3.0L, Engine Performance Wiring Diagram (4 of 4) for Audi A4 Quattro 2003:

• 150a
• 9-pin relay carrier in instrument panel
• Cooling fan system
• E-box relay carrier
• Fuel injectors
• Fuel pump motor
• Fuel pump relay
• Fuse 15a
• Fuse 20a
• Fuse holder
• G78 (lower right "b" pillar)
• Hot at all times
• Main fuse (on battery positive terminal)
• Motronic engine control module (left rear of engine compt)
• Red
• Relay plate
• Throttle valve control module (on throttle body)
• Transmission control module (left rear of engine compt)
• W/ cvt
• W/o cvt

EXTERIOR LIGHTS

Backup Lamps Wiring Diagram, Avant (High Line) for Audi A4 Quattro 2003

List of elements for Backup Lamps Wiring Diagram, Avant (High Line) for Audi A4 Quattro 2003:

• 31a
• A/t
• Back-up
• Back-up light switch
• Comfort system central control module (near base of left front seat, in electronics box)
• Fuse 15a
• Fuse holder (left end of dash)
• G50 (left side of luggage compt)
• G78 (at base of right "b" pillar)
• Hot in run or start
• Left taillamp assembly
• M/t
• Multi- function transmission range (tr) switch
• Right taillamp assembly
• T23
• T32b
• Vehicle electrical system control module (behind left side of dash)

Backup Lamps Wiring Diagram, Avant (Low Line) for Audi A4 Quattro 2003

List of elements for Backup Lamps Wiring Diagram, Avant (Low Line) for Audi A4 Quattro 2003:

• 31a
• A/t
• Back-up
• Back-up light switch
• Fuse 15a
• Fuse holder (left end of dash)
• G50 (left side of luggage compt)
• G78 (at base of right "b" pillar)
• Hot in run or start
• Left taillamp assembly
• M/t
• Multi-function transmission range (tr) switch
• Right taillamp assembly

Backup Lamps Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Backup Lamps Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• 31a
• Back-up
• Comfort system central control module (near base of left front seat, in electronics box)
• Fuse 15a
• Fuse holder (left end of dash)
• Hot in run or start
• Left taillamp assembly
• Park/neutral position (pnp) relay (relay carrier e-box)
• Right taillamp assembly
• T23
• T32b
• Transmission control module (tcm) (in plenum chamber e-box, at left rear of eng compt)
• Vehicle electrical system control module (behind left side of dash)

Backup Lamps Wiring Diagram, without Convertible, Sedan for Audi A4 Quattro 2003

List of elements for Backup Lamps Wiring Diagram, without Convertible, Sedan for Audi A4 Quattro 2003:

• 31a
• A/t w/ cvt
• A/t w/o cvt
• Back-up
• Back-up light switch
• Comfort system central control module (near base of left front seat, in electronics box)
• Fuse 15a
• Fuse holder (left end of dash)
• G50 (left side of luggage compt)
• G78 (at base of right "b" pillar)
• Hot in run or start
• Left taillamp assembly
• M/t
• Multi- function transmission range (tr) switch
• Park/neutral position (pnp) relay (relay carrier e-box)
• Right taillamp assembly
• T23
• T32b
• Transmission control module (tcm) (in plenum chamber e-box, at left rear of eng compt)
• Vehicle electrical system control module (behind left side of dash)

Exterior Lamps Wiring Diagram, Avant (High Line) for Audi A4 Quattro 2003

List of elements for Exterior Lamps Wiring Diagram, Avant (High Line) for Audi A4 Quattro 2003:

• (behind right side of dash) g33
• 13a
• 14a
• Acc
• Acc run
• Brake light switch (above brake pedal, on bracket)
• Computer data lines system
• Emergency flasher switch
• Filament bulb
• Fuse 10a
• Fuse 150a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (lower right "a" pillar)
• G50 (left side of luggage compt)
• G52 (left rear trunk lid)
• G78 (at base of right "b" pillar)
• Headlights system
• High- mount brake light
• Hot at all times
• Ignition/ starter switch
• Left headlight assembly
• Left side turn signal light
• Left taillamp assembly
• License plate lights
• Light switch
• Nca
• Off
• Park
• Red
• Right headlight assembly
• Right side turn signal light
• Right taillamp assembly
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• Stop
• T10b
• T16a
• T23
• T32b
• Tail
• Turn
• Turn signal switch
• Vehicle electrical system control module (behind left side of dash, below 9 pin relay carrier)
• W/ 1 filament bulb
• W/ 2
• W/ high intensity headlights

Exterior Lamps Wiring Diagram, Avant (Low Line) for Audi A4 Quattro 2003

List of elements for Exterior Lamps Wiring Diagram, Avant (Low Line) for Audi A4 Quattro 2003:

• (behind right side of dash) g33
• 13a
• 14a
• Acc
• Acc run
• Brake light switch (above brake pedal, on bracket)
• Computer data lines system
• Emergency flasher switch
• Fuse 10a
• Fuse 150a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (lower right "a" pillar)
• G50 (left side of luggage compt)
• G52 (left rear trunk lid)
• G78 (at base of right "b" pillar)
• Headlights system
• High- mount brake light
• Hot at all times
• Ignition/ starter switch
• Left headlight assembly
• Left side turn signal light
• Left taillamp assembly
• License plate lights
• Light switch
• Nca
• Off
• Park
• Red
• Right headlight assembly
• Right side turn signal light
• Right taillamp assembly
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• Stop
• T10b
• T16a
• T23
• T32b
• Tail
• Turn
• Turn signal switch
• Vehicle electrical system control module (behind left side of dash, below 9 pin relay carrier)
• W/ high intensity headlights

Exterior Lamps Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Exterior Lamps Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• (behind left side of dash) g49
• 13a
• 14a
• Acc
• Acc run
• Brake light switch (above brake pedal, on bracket)
• Computer data lines system
• Emergency flasher switch
• Fuse 10a
• Fuse 150a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G661 (on convertible top housing)
• G662 (left rear side of vehicle)
• G663 (right rear side of vehicle)
• High- mount brake light
• Hot at all times
• Ignition/ starter switch
• Left headlight assembly
• Left side turn signal light
• Left taillamp assembly
• License plate lights
• Light switch
• Nca
• Off
• Park
• Red
• Right headlight assembly
• Right side turn signal light
• Right taillamp assembly
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• Stop
• T10b
• T16a
• T23
• T32b
• Tail
• Turn
• Turn signal switch
• Vehicle electrical system control module (behind left side of dash, below 9 pin relay carrier)

Exterior Lamps Wiring Diagram, without Convertible, Sedan for Audi A4 Quattro 2003

List of elements for Exterior Lamps Wiring Diagram, without Convertible, Sedan for Audi A4 Quattro 2003:

• (behind right side of dash) g33
• 13a
• 14a
• Acc
• Acc run
• Brake light switch (above brake pedal, on bracket)
• Computer data lines system
• Emergency flasher switch
• Fuse 10a
• Fuse 150a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (lower right "a" pillar)
• G50 (left side of luggage compt)
• G78 (at base of right "b" pillar)
• Headlight assembly
• Headlights system
• High- mount brake light
• Hot at all times
• Ignition/ starter switch
• Left headlight assembly
• Left side turn signal light
• Left taillamp assembly
• License plate lights
• Light switch
• Nca
• Off
• Park
• Red
• Right
• Right side turn signal light
• Right taillamp assembly
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• Stop
• T10b
• T16a
• T23
• T32b
• Tail
• Turn
• Turn signal switch
• Vehicle electrical system control module (behind left side of dash, below 9 pin relay carrier)
• W/ high intensity headlights

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram, with Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Ground Distribution Wiring Diagram, with Convertible (1 of 2) for Audi A4 Quattro 2003:

• Battery
• Comfort system central control module, front interior light, automatic day/night mirror, vehicle electronic system control module, left/right make-up mirror lights
• Convertible top control module, convertible top operation hydraulic unit, high mount brake light, license plate light
• Cooant fc (fan control) control module
• Driver's backrest heating element, driver's heated seat side bolster heater
• G11 (at rear of engine compt, near base of windshield)
• G18 (on front of right valve cover)
• G26 (on left side of eng compt, under abs hydraulic unit)
• G32 (behind left kick panel)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G49 (behind left side of dash)
• G661
• Headlight washer pump, driver side door control module
• Ignition coil 1 w/ power output stage, ignition coil 2 w/ power output stage, ignition coil 3 w/ power output stage, ignition coil 4 w/ power output stage
• Left instrument panel vent illumination, center instrument panel vent illumination, right instrument panel vent illumination, storage compartment illumination, cup holder illumination, coin holder illumination, tiptronic switch, clutch vacuum vent valve switch (m/t),
• Passenger side door control module
• Right headlight assembly, right side turn signal light
• Shift lock solenoid, headlight range control module
• Vehicle electrical system control module, light switch, servotronic control module, a/c control head, fresh air blower control module, parking brake warning light switch, data link connector (dlc)
• Windshield wiper motor, left washer nozzle heater, right washer nozzle heater, brake fluid level warning switch, air quality sensor

Ground Distribution Wiring Diagram, with Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Ground Distribution Wiring Diagram, with Convertible (2 of 2) for Audi A4 Quattro 2003:

• Airbag control module, left/ right seat belt switches driver's side side airbag igniter, passenger side side airbag igniter, driver's side side airbag crash sensor, passenger side side airbag crash sensor, drivers front airbag crash sensor, passengers front airbag crash sensor
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G610 (under center console, behind shift lever)
• G637
• G662
• G663
• Hardtop detector switch, convertible top operation switch, convertible top operation hydraulic unit, convertible top compartment latch switch (unlock), left convertible top compartment cover switch, right compartment cover locked switch, convertible top compartment enclosure position switch, compartment cover open position switch, convertible top open/closed top lock switches, convertible top open position, convertible top closed position switch, right convertible top lock switch
• Heated rear window (soft top)
• Instrument panel, emergency flasher switch, cigarette lighter, ashtray light, anti slip control switch, glove compartment light switch
• Left front fog light, right front fog light, high tone horn, low tone horn, garage door opener control module
• Left headlight assembly, left side turn signal light, left front brake pad wear sensor
• Left taillight assembly, rear lid unlock motor, rear lid lock cylinder unlocking switch, trunk lid alarm switch, trunk lock alarm/central locking switch, left entry assistance control module, driver's seat lumber support adjustment switch, left rear window motor, heated rear window (hard top), driver's seat contact strip, memory seat control module
• Motronic engine control module (ecm), after-run coolant pump, brake system vacuum pump, ignition coil 1 w/ power output stage, ignition coil 2 w/ power output stage, ignition coil 3 w/ power output stage, ignition coil 4 w/ power output stage, ignition coil 5 w/ power output stage, ignition coil 6 w/ power output stage, oil level thermal sensor, transmission control module (tcm)
• Passenger side head airbag ignitor, right taillight assembly, passenger's seat side bolster heater, sensor, passenger's backrest heating element, right entry assistance control module, fuel tank lock switch,
• Radio
• Right rear window motor
• Secondary air injection (air) pump motor, abs control module (w/ edl), high pressure sensor, front hood switch, a/c compressor regulator valve
• Socket, fuel pump, passenger power seat switch, front passenger seat lumbar support adjustment switch, alarm horn
• Telephone control module for operating electronics, telephone amplifier, control module for navigation w/ cd-mechanism, radio, amplifier

Ground Distribution Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Ground Distribution Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003:

• Battery
• Center instrument panel vent illumination, right instrument panel vent illumination, storage compartment illumination, cup holder illumination, coin holder illumination, rear center ashtray light, tiptronic switch, ashtray light, glove compartment light switch, anti-slip control switch, rear window shade switch, a/c control head, fresh air blower control module, shift lock solenoid, headlight range control module
• Cooant fc (fan control) control module
• Driver's backrest heating element, driver's heated seat temperature sensor
• G11 (at rear of engine compt, near base of windshield)
• G18 (1.8l: at front of engine, near oil filler) (3.0l: on front of right valve cover)
• G26 (on left side of eng compt, under abs hydraulic unit)
• G32 (behind left kick panel)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G52 (left rear trunk lid) (avant)
• G53 (right rear trunk lid)
• G73 (center rear of roof)
• Headlight washer pump, driver side door control module
• High mount brake light (avant), license plate light (avant), rear lid lock cylinder unlocking switch, rear lid unlock motor, trunk lid alarm switch, trunk lock alarm/ central locking switch
• Ignition coil 1 w/ power output stage, ignition coil 2 w/ power output stage, ignition coil 3 w/ power output stage, ignition coil 4 w/ power output stage
• Left instrument panel vent illumination, comfort system central control module, servotronic control module, rear/center central locking switch
• Passenger side door control module
• Rear windshield wiper motor, rear window defogger (w/ window antenna),
• Right headlight assembly, right side turn signal light
• Telematic control head, automatic day/ night interior mirror, luggage compartment light, solar cells, anti-theft warning ultra-sound sensor, front interior light, left make-up mirror light switch, right make-up mirror light switch, sunroof motor
• Vehicle electrical system control module, light switch, emergency flasher switch, cigarette lighter, instrument panel, steering column electronic systems control module, parking brake warning light switch, data link connector (dlc)
• Windshield antenna suppression filter
• Windshield wiper motor, left washer nozzle heater, right washer nozzle heater, brake fluid level warning switch, air quality sensor

Ground Distribution Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Ground Distribution Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003:

• Airbag control module, left/ right seat belt switches driver's side side airbag igniter, passenger side side airbag igniter, driver's side side airbag crash sensor, passenger side side airbag crash sensor, driver's side rear side airbag crash sensor, passenger side rear side airbag crash sensor, driver's side rear side airbag igniter, passenger side rear side airbag igniter, drivers front airbag crash sensor, passengers front airbag crash sensor
• Driver side head airbag igniter, left front seat belt micro switch
• Driver's power seat switch, driver's seat lumbar support adjustment switch, memory seat control module
• Except avant
• Front passenger seat lumbar support adjustment switch
• G109
• G12 (on left center of firewall, near coolant reservoir)
• G50 (left side of luggage compt)
• G610 (under center console, behind shift lever)
• G77 (at base of left "b" pillar)
• G78 (at base of right "b" pillar)
• High-mount brake light, rear lid unlock motor, rear lid lock trunk lid alarm switch, trunk lock alarm/central locking switch, license plate light
• Left front fog light, right front fog light, high tone horn, low tone horn, garage door opener control module
• Left headlight assembly, data link connector (dlc), left side turn signal light, left front brake pad wear sensor
• Left rear central locking lock unit
• Left rear door control module
• Left rear entry light, left rear door warning light, left rear door opener lighting
• Left taillight assembly, rear window shade control module, cylinder unlocking switch
• Motronic engine control module (ecm), after-run coolant pump, brake system vacuum pump, ignition coil 1 w/ power output stage, ignition coil 2 w/ power output stage, ignition coil 3 w/ power output stage, ignition coil 4 w/ power output stage, ignition coil 5 w/ power output stage, ignition coil 6 w/ power output stage, speedometer vehicle speed sensor, oil level thermal sensor, transmission control module (tcm), multi-function transmission range (tr) switch, a/c compressor regulator valve
• Passenger side head airbag igniter, right taillight assembly, passenger's heated seat temperature sensor, passenger's backrest heating element, left rear heated seat temperature sensor, left rear backrest heating element, right rear heated seat control module, left rear heated seat temperature sensor, right rear heated seat temperature sensor, right rear backrest heating element, socket, fuel pump, passenger power seat switch, front passenger seat lumbar support adjustment switch, alarm horn
• Radio
• Right rear central locking lock unit
• Right rear door control module
• Right rear door warning light, right rear door opener lighting, right rear entry light
• Secondary air injection (air) pump motor, abs control module (w/ edl), high pressure sensor, front hood switch
• Telephone control module for operating electronics, telephone amplifier, control module for navigation w/ cd-mechanism, radio, amplifier
• Telephone/telematic control module

HEADLIGHTS

Headlamps & Fog Lamps Wiring Diagram, with Convertible with High Intensity Gas Discharge Headlights for Audi A4 Quattro 2003

List of elements for Headlamps & Fog Lamps Wiring Diagram, with Convertible with High Intensity Gas Discharge Headlights for Audi A4 Quattro 2003:

• (w/ light sensor)
• 10a
• 56a
• 56b
• 9-pin relay carrier (in instrument panel)
• Acc
• Anti-lock brakes system
• Battery
• Computer data lines system
• Fog light switch
• Fuse 10a
• Fuse 150a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G43 (behind right kick panel)
• G49 (behind left side of dash)
• G662 (left rear side of vehicle)
• Headlight range control module (behind glove box)
• Headlight switch
• High intensity gas discharge lamp
• Hot at all times
• Hot in run or start
• Ignition switch
• Instrument cluster system
• Interior lights system
• Left front fog light
• Left front level control system sensor (on left front suspension assembly, in wheelwell)
• Left headlight assembly
• Left headlight beam adjusting motor
• Left high beam head- light
• Left rear fog light
• Left rear level control system sensor (on left rear suspension assembly, in wheelwell)
• Light switch
• Load reduction relay
• Nca
• Off
• Red
• Right front fog light
• Right headlight assembly
• Right headlight beam adjusting motor
• Right high beam head- light
• Run
• Start
• Starting/ charging system
• Steering column electronic systems control module (top of steering column)
• T16a
• T23
• T32b
• Transmissions system
• Turn signal switch (headlight dimmer switch)
• Vehicle electrical system control module (behind left side of dash)
• W/ light sensor

Headlamps & Fog Lamps Wiring Diagram, with Convertible with Standard Headlights for Audi A4 Quattro 2003

List of elements for Headlamps & Fog Lamps Wiring Diagram, with Convertible with Standard Headlights for Audi A4 Quattro 2003:

• 56a
• 56b
• 9-pin relay carrier (in instrument panel)
• Acc
• Battery
• Computer data lines system
• Fog light switch
• Fuse 150a
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G43 (behind right kick panel)
• G49 (behind left side of dash)
• G662 (left rear side of vehicle)
• Headlight switch
• Hot at all times
• Ignition switch
• Interior lights system
• Left front fog light
• Left headlight assembly
• Left rear fog light
• Light switch
• Load reduction relay
• Nca
• Off
• Red
• Right front fog light
• Right headlight assembly
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• T23
• T32b
• Turn signal switch (headlight dimmer switch)
• Vehicle electrical system control module (behind left side of dash)
• W/ light sensor

Headlamps & Fog Lamps Wiring Diagram, without Convertible with High Intensity Gas Discharge Headlights High Option Content for Audi A4 Quattro 2003

List of elements for Headlamps & Fog Lamps Wiring Diagram, without Convertible with High Intensity Gas Discharge Headlights High Option Content for Audi A4 Quattro 2003:

• (w/ light sensor)
• 10a
• 56a
• 56b
• 9-pin relay carrier (in instrument panel)
• Acc
• Anti-lock brakes system
• Battery
• Computer data lines system
• Fog light switch
• Fuse 10a
• Fuse 150a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (lower right "a" pillar)
• G662 (left rear side of vehicle)
• Headlight range control module (behind glove box)
• Headlight switch
• High intensity gas discharge lamp
• Hot at all times
• Hot in run or start
• Ignition switch
• Instrument cluster system
• Interior lights system
• Left front fog light
• Left front level control system sensor (on left front suspension assembly, in wheelwell)
• Left headlight assembly
• Left headlight beam adjusting motor
• Left high beam head- light
• Left rear fog light
• Left rear level control system sensor (on left rear suspension assembly, in wheelwell)
• Light switch
• Load reduction relay
• Nca
• Off
• Red
• Right front fog light
• Right headlight assembly
• Right headlight beam adjusting motor
• Right high beam head- light
• Run
• Start
• Starting/ charging system
• Steering column electronic systems control module (top of steering column)
• T16a
• T23
• T32b
• Transmissions system
• Turn signal switch (headlight dimmer switch)
• Vehicle electrical system control module (behind left side of dash)
• W/ light sensor

Headlamps & Fog Lamps Wiring Diagram, without Convertible with High Intensity Gas Discharge Headlights Low Option Content for Audi A4 Quattro 2003

List of elements for Headlamps & Fog Lamps Wiring Diagram, without Convertible with High Intensity Gas Discharge Headlights Low Option Content for Audi A4 Quattro 2003:

• (w/ light sensor)
• 10a
• 20a
• 21a
• 56a
• 56b
• 9-pin relay carrier (in instrument panel)
• Acc
• Anti-lock brakes system
• Battery
• Computer data lines system
• Fog light switch
• Fuse 10a
• Fuse 150a
• Fuse 15a
• Fuse holder (left end of dash)
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (lower right "a" pillar)
• G662 (left rear side of vehicle)
• Headlight range control module (behind glove box)
• Headlight switch
• High intensity gas discharge lamp
• Hot at all times
• Hot in run or start
• Ignition switch
• Instrument cluster system
• Interior lights system
• Left front fog light
• Left front level control system sensor (on left front suspension assembly, in wheelwell)
• Left headlight assembly
• Left headlight beam adjusting motor
• Left high beam head- light
• Left rear fog light
• Left rear level control system sensor (on left rear suspension assembly, in wheelwell)
• Light switch
• Load reduction relay
• Nca
• Off
• Red
• Right front fog light
• Right headlight assembly
• Right headlight beam adjusting motor
• Right high beam head- light
• Run
• Start
• Starting/ charging system
• Steering column electronic systems control module (top of steering column)
• T16a
• T23
• T32b
• Transmissions system
• Turn signal switch (headlight dimmer switch)
• Vehicle electrical system control module (behind left side of dash)
• W/ light sensor

Headlamps & Fog Lamps Wiring Diagram, without Convertible with Standard Headlights for Audi A4 Quattro 2003

List of elements for Headlamps & Fog Lamps Wiring Diagram, without Convertible with Standard Headlights for Audi A4 Quattro 2003:

• 56a
• 56b
• 9-pin relay carrier (in instrument panel)
• Acc
• Battery
• Computer data lines system
• Fog light switch
• Fuse 150a
• Fuse strip (main fuse)
• G12 (on left center of firewall, near coolant reservoir)
• G33 (behind right side of dash)
• G43 (lower right "a" pillar)
• G662 (left rear side of vehicle)
• Headlight switch
• Hot at all times
• Ignition switch
• Interior lights system
• Left front fog light
• Left headlight assembly
• Left rear fog light
• Light switch
• Load reduction relay
• Nca
• Off
• Red
• Right front fog light
• Right headlight assembly
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• T23
• T32b
• Turn signal switch (headlight dimmer switch)
• Vehicle electrical system control module (behind left side of dash)
• W/ light sensor

HORN

Horn Wiring Diagram for Audi A4 Quattro 2003

List of elements for Horn Wiring Diagram for Audi A4 Quattro 2003:

• 40a
• Computer data lines system
• Fuse 25a
• Fuse holder (left end of dash)
• G12 (on left center of firewall, near coolant reservoir)
• High tone horn
• Horn relay (9-pin relay carrier)
• Horn switch
• Hot at all times
• Low tone horn
• Nca
• Steering column electronic systems control module (in top of steering column)
• T16a
• T32b
• T42
• Telephone/telematic control module (near base of right front seat)
• Vehicle electrical system control module (behind left side of dash)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Instrument Cluster Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• (at base of right front seat)
• (behind right side of dash)
• (left center of firewall)
• (left rear side of vehicle) g662
• (right rear side of vehicle) g663
• 15a
• Abs control module (on left side of engine compartment)
• Acc
• Air bag mil
• Airbag control module (below center console)
• Ambient temperature switch (behind lower left center of front bumper)
• Anti-lock brakes system
• Anti-theft immobilzer induction coil
• Anti-theft system
• Board computer function selector switch ii
• Brake fluid level warning switch (on brake fluid reservoir)
• Buzzer
• Clock
• Computer data lines system
• Control module for navigation w/ cd-mechanism
• Driver's seat contact strip
• Ect gauge
• Engine coolant level (ecl) warning switch
• Engine coolant temperature (ect) sensor
• Fuel gauge
• Fuel gauge gauge sender
• Fuel level sensor 2 (quattro only)
• Fuel tank lock switch (if equipped)
• Fuse 10a
• Fuse holder (left end of dash)
• G12
• G33
• G49 (behind left side of dash)
• Gen warn ind
• Headlight range control module (behind glove box)
• Hot at all times
• Hot in run or start
• Ignition switch
• Instrument cluster
• Interior lights system
• Key switch
• Motronic engine control module (in plenum chamber e-box, at left rear engine compt)
• Off
• Oil level thermal sensor
• Oil pressure switch
• Radio
• Radio frequency controlled clock receiver (if equipped)
• Red
• Run
• Speedo- meter
• Start
• Starting/charging system
• Steering column electronic systems control module (in top of steering column)
• T16a
• T20d
• T20e
• T32
• T32a
• T4m
• Tacho- meter
• Telephone/ telematic control module
• Tiptronic switch
• Transmission control module (left rear of eng compt) (w/o cvt)
• Warnings system
• Windshield washer fluid level warning switch

Instrument Cluster Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for Instrument Cluster Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• (2003)
• (at base of left "b" pillar) g77
• (at base of right front seat)
• (left side of eng compt)
• 15a
• Abs control module (on left side of engine compartment)
• Acc
• Air bag mil
• Airbag control module (below center console)
• Ambient temperature switch (behind lower left center of front bumper)
• Anti-lock brakes system
• Anti-theft immobilzer induction coil
• Anti-theft system
• Board computer function selector switch ii
• Brake fluid level warning switch (on brake fluid reservoir)
• Buzzer
• Clock
• Computer data lines system
• Computer data-lines system
• Control module for navigation w/ cd-mechanism
• Ect gauge
• Engine coolant level (ecl) warning switch
• Engine coolant temperature (ect) sensor
• Fuel gauge
• Fuel gauge gauge sender
• Fuel level sensor 2 (quattro only)
• Fuse 10a
• Fuse holder (left end of dash)
• G12
• G33 (behind right side of dash)
• G43 (behind right kick panel)
• Gen warn ind
• Headlight range control module (behind glove box)
• Hot at all times
• Hot in run or start
• Ignition switch
• Instrument cluster
• Interior lights system
• Key switch
• Left front seat belt micro switch
• Motronic engine control module (in plenum chamber e-box, at left rear engine compt)
• Off
• Oil level thermal sensor
• Oil pressure switch
• Radio
• Radio frequency controlled clock receiver (if equipped)
• Red
• Run
• Servotronic control module (on 9 pin relay carrier)
• Speedo- meter
• Start
• Starting/charging system
• Steering column electronic systems control module (in top of steering column)
• T16a
• T18
• T20d
• T20e
• T32
• T32a
• T4m
• Tacho- meter
• Telephone control module for operating electronics
• Telephone/ telematic control module
• Tiptronic switch
• Transmission control module (left rear of eng compt) (w/o cvt)
• Warnings system
• Windshield washer fluid level warning switch

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram, Avant (1 of 2) for Audi A4 Quattro 2003

List of elements for Courtesy Lamps Wiring Diagram, Avant (1 of 2) for Audi A4 Quattro 2003:

• Automatic day/night mirror
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Front interior light assembly
• Fuse 5a
• Fuse holder
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• Glove compartment light
• Glove compartment light switch
• Hot at all times
• Instrument illumination circuit
• Interior lights system (instrument illumination circuit)
• Left footwell light
• Left make-up mirror light switch
• Luggage compartment light
• Make-up mirror light
• Pass side air bag off ind
• Rear crtsy
• Rear lid light
• Rear reading/ courtesy light
• Right footwell light
• Right make-up mirror light switch

Courtesy Lamps Wiring Diagram, Avant (2 of 2) for Audi A4 Quattro 2003

List of elements for Courtesy Lamps Wiring Diagram, Avant (2 of 2) for Audi A4 Quattro 2003:

• Computer data lines system
• Driver side central locking unit (door contact switch)
• Driver side door control module (integral with window regulator motor)
• Driver side door opener lighting
• Driver side door warning light
• Left front entry light
• Left rear central locking unit (door contact switch)
• Left rear door control module (integral with window regulator motor)
• Left rear door opener lighting
• Left rear door warning light
• Left rear entry light
• Passenger compartment monitoring switch
• Passenger door control module (integral with window regulator motor)
• Passenger side central locking unit (door contact switch)
• Passenger side door opener lighting
• Passenger side door warning light
• Power windows system
• Power windows, mirrors systems
• Power windows, mirrors, door locks systems
• R52
• R53
• R54
• R55
• R56
• R57
• Right front entry light
• Right rear central locking unit (door contact switch)
• Right rear door control module (integral with window regulator motor)
• Right rear door opener lighting
• Right rear door warning light
• Right rear entry light
• T10e
• T10f
• T10g
• T10h
• T12
• T12a
• T12b
• T12c
• T16d
• T16e
• T32c
• T32d

Courtesy Lamps Wiring Diagram, Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Courtesy Lamps Wiring Diagram, Convertible (1 of 2) for Audi A4 Quattro 2003:

• A175
• Automatic day/night mirror
• B270
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Front interior light assembly
• Fuse 5a
• Fuse holder
• G33 (behind right side of dash)
• G44 (behind left kick panel)
• Glove compartment light
• Glove compartment light switch
• Hot at all times
• Interior lights system (instrument illumination circuit)
• Left footwell light
• Left luggage compartment light
• Left make-up mirror light switch
• Left rear footwell light
• Make-up mirror light
• Pass side air bag off ind
• Right footwell light
• Right luggage compartment light
• Right make-up mirror light switch
• Right rear footwell light

Courtesy Lamps Wiring Diagram, Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Courtesy Lamps Wiring Diagram, Convertible (2 of 2) for Audi A4 Quattro 2003:

• Computer data lines system
• Driver side central locking unit (door contact switch)
• Driver side door control module (integral with window regulator motor)
• Driver side door opener lighting
• Driver side door warning light
• Left front entry light
• Passenger compartment monitoring switch
• Passenger door control module (integral with window regulator motor)
• Passenger side central locking unit (door contact switch)
• Passenger side door opener lighting
• Passenger side door warning light
• Power windows, mirrors systems
• Power windows, mirrors, door locks systems
• R52
• R53
• R54
• R55
• R56
• R57
• Right front entry light
• T10e
• T10f
• T12
• T12a
• T32c
• T32d
• W/ door warning and entry lights
• W/ door warning light only

Courtesy Lamps Wiring Diagram, Sedan (1 of 2) for Audi A4 Quattro 2003

List of elements for Courtesy Lamps Wiring Diagram, Sedan (1 of 2) for Audi A4 Quattro 2003:

• A175
• Automatic day/night mirror
• B270
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Front interior light assembly
• Fuse 5a
• Fuse holder
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• Glove compartment light
• Glove compartment light switch
• Hot at all times
• Interior lights system (instrument illumination circuit)
• Left footwell light
• Left luggage compartment light
• Left make-up mirror light switch
• Make-up mirror light
• Pass side air bag off ind
• Rear crtsy
• Rear reading/ courtesy light
• Right footwell light
• Right luggage compartment light
• Right make-up mirror light switch

Courtesy Lamps Wiring Diagram, Sedan (2 of 2) for Audi A4 Quattro 2003

List of elements for Courtesy Lamps Wiring Diagram, Sedan (2 of 2) for Audi A4 Quattro 2003:

• Computer data lines system
• Driver side central locking unit (door contact switch)
• Driver side door control module (integral with window regulator motor)
• Driver side door opener lighting
• Driver side door warning light
• Left front entry light
• Left rear central locking unit (door contact switch)
• Left rear door control module (integral with window regulator motor)
• Left rear door opener lighting
• Left rear door warning light
• Left rear entry light
• Passenger compartment monitoring switch
• Passenger door control module (integral with window regulator motor)
• Passenger side central locking unit (door contact switch)
• Passenger side door opener lighting
• Passenger side door warning light
• Power windows system
• Power windows, mirrors systems
• Power windows, mirrors, door locks systems
• R52
• R53
• R54
• R55
• R56
• R57
• Right front entry light
• Right rear central locking unit (door contact switch)
• Right rear door control module (integral with window regulator motor)
• Right rear door opener lighting
• Right rear door warning light
• Right rear entry light
• T10e
• T10f
• T10g
• T10h
• T12
• T12a
• T12b
• T12c
• T16d
• T16e
• T32c
• T32d

Instrument Illumination Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Instrument Illumination Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• A175
• Anti-slip control switch
• Ashtray light
• B270
• Battery
• Board computer function selector switch ii
• Center instrument panel vent illumination
• Cigarette lighter
• Coin holder illumination
• Computer data lines system
• Convertible top operation switch
• Cup holder illumination
• Front reading light assembly
• Fuse 150a
• Fuse strip (main fuse)
• G33 (behind right side of dash)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G49 (behind left side of dash)
• G663
• Instrument cluster
• Instrument cluster system
• Left instrument panel vent illumination
• Light switch
• Nca
• Rear center ashtray light
• Red
• Right instrument panel vent illumination
• Steering column electronic systems control module (in top of steering column)
• Storage compartment illumination
• T10j
• T16a
• T32
• T32a
• T32b
• Tiptronic switch (if equipped)
• Vehicle electrical system control module (behind left side of dash)

Instrument Illumination Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for Instrument Illumination Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• (at base of right "b" pillar) g78
• A175
• Anti-slip control switch
• Ashtray light
• B270
• Battery
• Board computer function selector switch ii
• Center instrument panel vent illumination
• Cigarette lighter
• Coin holder illumination
• Computer data lines system
• Cup holder illumination
• Front reading light assembly
• Fuse 150a
• Fuse strip (main fuse)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G44 (behind left kick panel)
• Instrument cluster
• Instrument cluster system
• Left instrument panel vent illumination
• Left rear heated seat control module
• Light switch
• Luggage compartment light switch (advant)
• Nca
• Rear center ashtray light
• Rear window shade switch
• Red
• Right instrument panel vent illumination
• Right rear heated seat control module
• Steering column electronic systems control module (in top of steering column)
• Storage compartment illumination
• T10j
• T16a
• T18
• T32
• T32a
• T32b
• Telematic control head
• Telephone control module for operating electronics
• Tiptronic switch (if equipped)
• Vehicle electrical system control module (behind left side of dash)

MEMORY SYSTEMS

Memory Systems Wiring Diagram, with Convertible (1 of 4) for Audi A4 Quattro 2003

List of elements for Memory Systems Wiring Diagram, with Convertible (1 of 4) for Audi A4 Quattro 2003:

• 4-pin relay carrier (behind left end of dash)
• Backrest adjust
• Computer data lines system
• Driver's power seat switch
• Driver's seat headrest adjustment latch switch
• Driver's seat height adjustment motor
• Driver's seat inclination adjustment motor
• Driver's seat lumbar support adjustment switch
• Driver's seat lumbar support curvature adjustment motor
• Driver's seat lumbar support height adjustment motor
• Driver's seat seatback adjustment motor
• Fore/aft adjust
• G662 (left rear side of vehicle)
• Headrest adjust
• Hot at all times
• Memory seat control module (under left front seat)
• Power seat fuse 45 30a
• Seat height adjust
• Slope adjust
• T10v
• T12g
• T32e
• T6n

Memory Systems Wiring Diagram, with Convertible (2 of 4) for Audi A4 Quattro 2003

List of elements for Memory Systems Wiring Diagram, with Convertible (2 of 4) for Audi A4 Quattro 2003:

• (left rear side of vehicle) g662
• Computer data lines system
• Driver's seat fore/aft adjustment motor
• Driver's seat headrest adjustment motor
• Driver's seat seatback latch switch
• Left entry assistance control module
• Passenger's seat fore/aft adjustment motor
• Passenger's seat headrest adjustment motor
• Rear window shade switch (rear)
• Red
• T12h
• T32g

Memory Systems Wiring Diagram, with Convertible (3 of 4) for Audi A4 Quattro 2003

List of elements for Memory Systems Wiring Diagram, with Convertible (3 of 4) for Audi A4 Quattro 2003:

• (right rear side of vehicle) g663
• 4-pin relay carrier (behind left end of dash)
• Backrest adjust
• Computer data lines system
• Fore/aft adjust
• G663 (right rear side of vehicle)
• Headrest adjust
• Hot at all times
• Passenger's entry assistance switch
• Passenger's power seat switch
• Passenger's seat headrest adjustment latch switch
• Passenger's seat height adjustment motor
• Passenger's seat inclination adjustment motor
• Passenger's seat lumbar support adjustment switch
• Passenger's seat lumbar support curvature adjustment motor
• Passenger's seat lumbar support height adjustment motor
• Passenger's seat seatback adjustment motor
• Passenger's seat seatback latch switch
• Power seat fuse 46 30a
• Red
• Right entry assistance control module
• Seat height adjust
• T10w
• T12i
• T32h
• T6o
• Tilt adjust

Memory Systems Wiring Diagram, with Convertible (4 of 4) for Audi A4 Quattro 2003

List of elements for Memory Systems Wiring Diagram, with Convertible (4 of 4) for Audi A4 Quattro 2003:

• 22a
• Computer data lines system
• De- fog
• Driver side door control module module (integral with window regulator motor)
• Driver's seat memory program control
• Driver's side outside folding mirror
• Fold- away
• Fuse 15a
• Fuse holder (left end of dash)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• Hot at all times
• Mirror adjustment switch
• Mirror fold away switch
• Mirror selector switch
• Nca
• Passenger side door control module (integral with window regulator motor)
• Passenger's side outside folding mirror
• Position
• T10e
• T10f
• T16b
• T16c
• T32c

Memory Systems Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Memory Systems Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003:

• 4-pin relay carrier (behind left end of dash)
• Computer data lines system
• Driver's power seat switch
• Driver's seat fore/aft motor/ switch assembly
• Driver's seat height adjustment motor/switch assembly
• Driver's seat inclination adjustment motor/switch assembly
• Driver's seat lumbar support adjustment switch
• Driver's seat lumbar support curvature adjustment motor
• Driver's seat lumbar support height adjustment motor
• Driver's seat seatback adjustment motor/switch assembly
• G77 (at base of left "b" pillar)
• Hot at all times
• Memory seat control module (under left front seat)
• Power seat fuse 30a
• Red
• T12g
• T32e

Memory Systems Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Memory Systems Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003:

• 22a
• Computer data lines system
• De- fog
• Driver side door control module module (integral with window regulator motor)
• Driver's seat memory program control
• Driver's side outside folding mirror
• Fold- away
• Fuse 15a
• Fuse holder (left end of dash)
• G43 (lower right "a" pillar)
• G44 (lower left "a" pillar)
• Hot at all times
• Interior lights system
• Mirror adjustment switch
• Mirror fold away switch
• Mirror selector switch
• Nca
• Passenger side door control module (integral with window regulator motor)
• Passenger's side outside folding mirror
• Position
• T10e
• T10f
• T16b
• T16c
• T32c

NAVIGATION

Navigation Wiring Diagram for Audi A4 Quattro 2003

List of elements for Navigation Wiring Diagram for Audi A4 Quattro 2003:

• Backup lamps circuit
• Board computer function selector switch ii
• Computer data lines system
• Control module for navigation w/ cd-mechanism (at left rear of luggage compartment)
• Fuse 10a
• Fuse holder (left end of dash)
• G610 (under center console, behind shift lever)
• Gps antenna
• Hot at all times
• Hot in on or start
• Instrument cluster
• Instrument cluster system
• Interior lights system
• Nca
• Radio
• T10i
• T20d
• T20e
• T32
• T32a
• T42
• T8e
• Telephone/telematic control module (if equipped) (near base of right front seat)

POWER DISTRIBUTION

Power Distribution Wiring Diagram, with Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Power Distribution Wiring Diagram, with Convertible (1 of 2) for Audi A4 Quattro 2003:

• 10a
• 16a
• 22a
• 243a
• 30a
• 31a
• 33a
• 36a
• 37a
• 38a
• 50b
• 86s
• 9-pin relay carrier (in instrument panel)
• A/c control head
• A32
• A33
• A34
• A52
• A57
• Abs control module (w/edl)
• Abs control module fuse 1
• Acc
• Acc run
• Air quality sensor, high pressure sensor
• Airbag control module
• Back-up light switch, automatic day/night interior mirror, data link connector (dlc), shift lock solenoid, multi-function transmission range (tr) switch, transmission control module, park/nuetral position relay
• Battery
• Brake booster relay
• Brake light switch, clutch vacuum vent valve switch, abs control module (w/ edl), anti-slip control switch
• Cigarette lighter
• Convertible top control module
• Convertible top fuse 40a
• Convertible top operation hydraulic unit
• D50
• Driver side door control module
• Fuel pump (fp) relay
• Fuse 10a
• Fuse 150a
• Fuse 15a
• Fuse 25a
• Fuse 30a
• Fuse 40a
• Fuse 50a
• Fuse 5a
• Fuse holder
• Fuse strip (main fuse)
• G33 (behind right side of dash)
• Garage door opener control head, garage door opener control module
• Generator
• Headlight range control module
• Ignition/starter switch
• Instrument panel
• Instrument panel, steering column electronic systems control module
• Light switch
• Load reduction relay
• Motronic engine control module (ecm)
• Nca
• Off
• Oil level thermal sensor, telephone/telematic control module, board computer function selector switch ii, tiptronic switch, telephone control module for operating electronics, control module for navigation w/ cd-mechanism
• Park/neutral position (pnp) relay, steering column electronic systems control module
• Passenger side airbag off indicator
• Passenger side door control module
• Red
• Red b
• Relay carrier e-box
• Run
• Secondary air injection (air) pump relay
• Servotronic control module
• Start
• Starter
• Starter, locking relay for starter (clutch pedal switch), starter interlock alarm system relay
• Steering column electronic systems control module
• T10b
• T32b
• Telephone amplifier
• Telephone/ telematic control module, telephone control module for operating electronics
• To 4-pin relay carrier (diagram 2 of 2)
• To fuse (diagram 2 of 2)
• To fuse holder (diagram 2 of 2)
• Transmission control module (tcm)
• Ultra-sound sensor for anti-theft warning, alarm horn, comfort system central control module
• Vehicle electrical system control module
• Washer nozzle heater (left/right)

Power Distribution Wiring Diagram, with Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Power Distribution Wiring Diagram, with Convertible (2 of 2) for Audi A4 Quattro 2003:

• 12a
• 13a
• 14a
• 15a
• 24a
• 25a
• 26a
• 35a
• 39a
• 4-pin relay carrier
• 40a
• 42a
• 44a
• A/c control head
• A98
• Abs control module
• Brake light switch
• Comfort system central control module
• Control module for navigation w/ cd mechanism, instrument panel
• Coolant fan fuse 42 60a
• Coolant fc (fan control) module
• Data link connector (dlc)
• Driver side door control module, passenger side door control module
• Driver's seat lumbar support adjustment switch, memory seat control module, left entry assistance control module
• Fresh air blower control module
• From battery (diagram 1 of 2)
• From fuse holder fuse 30 (diagram 1 of 2)
• From fuse holder fuse 33 (diagram 1 of 2)
• From ignition/ starter switch (diagram 1 of 2)
• Fuel pump relay
• Fuse 10a
• Fuse 20a
• Fuse 25a
• Fuse 30a
• Fuse 5a
• Fuse holder
• Horn relay
• Left/right footwell light, left/right rear footwell light
• Left/right rear power window motors
• Passenger's power seat switch, front passenger seat lumbar support adjustment switch, right entry assistance control module
• Power seat fuse 45 30a
• Power seat fuse 46 30a
• Power window fuse 2 30a
• Power window fuse 37 30a
• Radio, amplifier
• Red
• Socket
• Steering column electronic systems control module

Power Distribution Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Power Distribution Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003:

• (1.8l) (3.0l)
• 10a
• 16a
• 22a
• 243a
• 30a
• 31a
• 33a
• 36a
• 37a
• 38a
• 50b
• 86s
• 9-pin relay carrier (in instrument panel)
• A/c control head
• A32
• A33
• A34
• A52
• A57
• Abs control module (w/edl)
• Abs control module fuse 1
• Acc
• Acc run
• Air quality sensor, high pressure sensor
• Airbag control module
• Back-up light switch, automatic day/night interior mirror, data link connector (dlc), shift lock solenoid, multi-function transmission range (tr) switch, transmission control module, park/nuetral position relay
• Battery
• Brake booster relay
• Brake light switch, clutch vacuum vent valve switch, abs control module (w/ edl), anti-slip control switch
• Cigarette lighter
• D50
• Driver side door control module
• Fuel pump (fp) relay
• Fuse 10a
• Fuse 150a
• Fuse 15a
• Fuse 20a
• Fuse 25a
• Fuse 30a
• Fuse 50a
• Fuse 50a 40a
• Fuse 5a
• Fuse holder
• Fuse strip (main fuse)
• G43 (behind right kick panel)
• Garage door opener control head, garage door opener control module
• Generator
• Headlight range control module
• Ignition/starter switch
• Instrument panel
• Instrument panel, steering column electronic systems control module
• Light switch
• Load reduction relay
• Motronic engine control module (ecm)
• Nca
• Off
• Oil level thermal sensor, telephone/telematic control module, board computer function selector switch ii, tiptronic switch, rear window shade switch, telephone control module for operating electronics, control module for navigation w/ cd-mechanism, left rear heated seat control module, right rear heated seat control module
• Park/neutral position (pnp) relay, steering column electronic systems control module
• Passenger side airbag off indicator
• Passenger side door control module
• Rear shade circuit breaker 10a
• Rear window shade control module
• Rear windshield wiper motor
• Red
• Red b
• Relay carrier e-box
• Run
• Secondary air injection (air) pump relay
• Servotronic control module
• Start
• Starter
• Starter, locking relay for starter (clutch pedal switch), starter interlock alarm system relay
• Steering column electronic systems control module
• Sunroof motor
• T10b
• T32b
• Telephone amplifier
• Telephone/ telematic control module, telephone control module for operating electronics
• To 4-pin relay carrier (diagram 2 of 2)
• To fuse (diagram 2 of 2)
• To fuse holder (diagram 2 of 2)
• Transmission control module (tcm)
• Ultra-sound sensor for anti-theft warning, alarm horn, comfort system central control module
• Vehicle electrical system control module
• Washer nozzle heater (left/right)

Power Distribution Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Power Distribution Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003:

• (1.8l)
• (on base of right "b" pillar)
• 12a
• 13a
• 14a
• 15a
• 23a
• 24a
• 25a
• 26a
• 35a
• 39a
• 4-pin relay carrier
• 40a
• 42a
• 44a
• A/c control head
• A98
• Abs control module
• Brake light switch
• Comfort system central control module
• Control module for navigation w/ cd mechanism, instrument panel
• Coolant fan fuse 42 40a 60a (3.0l)
• Coolant fc (fan control) module
• Data link connector (dlc)
• Driver side door control module, passenger side door control module
• Driver's power seat switch, driver's seat lumbar support adjustment switch, memory seat control module
• Fresh air blower control module
• From battery (diagram 1 of 2)
• From fuse holder fuse 30 (diagram 1 of 2)
• From fuse holder fuse 33 (diagram 1 of 2)
• From ignition/ starter switch (diagram 1 of 2)
• Fuel pump (fp) relay
• Fuse 10a
• Fuse 15a
• Fuse 20a
• Fuse 25a
• Fuse 30a
• Fuse 5a
• Fuse holder
• G78
• Horn relay
• Left rear door control module
• Left rear door control module, right rear door control module
• Left rear heated seat control module, right rear heated seat control module, a/c control head
• Left/right footwell light
• Passenger's power seat switch, front passenger seat lumbar support adjustment switch
• Power seat fuse 45 30a
• Power seat fuse 46 30a
• Power window fuse 2 30a
• Power window fuse 37 30a
• Radio, amplifier
• Red
• Right rear door control module
• Socket
• Steering column electronic systems control module

POWER DOOR LOCKS

Power Door Locks Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Power Door Locks Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• 22a
• 24a
• 38a
• 9-pin relay carrier
• A146
• A147
• A66
• B110
• B207
• Central locking warning light (safe) (driver side door)
• Central locking warning light (safe) (passenger side door)
• Central locking/ anti-theft alarm system antenna
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Driver side central locking lock unit
• Driver side door control module (integral with window regulator motor)
• Driver side interior lock switch
• Fuel tank lid unlock motor
• Fuse 15a
• Fuse 20a
• Fuse holder (left end of dash)
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• G49 (behind left side of dash)
• G662 (left rear side of vehicle)
• Glove box lock motor
• Hot at all times
• Mirrors system, interior lights system, power windows system, memory system
• Mirrors, power windows, interior lights systems
• Nca
• Passenger compartment monitoring switch
• Passenger side central locking lock unit
• Passenger side door control module (integral with window regulator motor)
• Power window fuse 37 30a
• Rear lid lock cylinder unlocking switch
• Rear lid unlock motor
• Red
• T10e
• T10f
• T12
• T12a
• T32c
• Trunk, tailgate, fuel doors system

Power Door Locks Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Power Door Locks Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003:

• 22a
• 24a
• 38a
• 9-pin relay carrier
• A146
• A147
• A66
• B110
• B207
• Central locking warning light (safe)
• Central locking/ anti-theft alarm system antenna
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Driver side central locking lock unit
• Driver side door control module (integral with window regulator motor)
• Driver side interior lock switch
• Fuel tank lid unlock motor
• Fuse 15a
• Fuse 20a
• Fuse holder
• G44 (behind left kick panel)
• G50 (left side of luggage compt)
• Hot at all times
• Kick panel) g44
• Mirrors system, interior lights system, power windows system, memory system
• Mirrors, power windows, interior lights systems
• Nca
• Passenger compartment monitoring switch
• Power window fuse 37 30a
• Rear lid lock cylinder unlocking switch
• Rear lid unlock motor
• Rear/center central locking switch (if equipped)
• T10e
• T12
• T32c
• T42
• Telephone/telematic control module (near base of right front seat)

Power Door Locks Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Power Door Locks Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003:

• 23a
• 9-pin relay carrier
• Fuse 15a
• Fuse holder
• G43 (behind right kick panel)
• G77 (at base of left "b" pillar)
• G78 (at base of right "b" pillar)
• Hot at all times
• Left rear central locking lock unit
• Left rear door control module (integral with window regulator motor)
• Passenger side central locking lock unit
• Passenger side door control module (integral with window regulator motor)
• Power window fuse 2 30a
• Right rear central locking lock unit
• Right rear door control module (integral with window regulator motor)
• T10f
• T10g
• T10h
• T12a
• T12b
• T12c

POWER MIRRORS

Automatic Day/Night Mirror Wiring Diagram for Audi A4 Quattro 2003

List of elements for Automatic Day/Night Mirror Wiring Diagram for Audi A4 Quattro 2003:

• (behind left kick panel)
• 31a
• Automatic day/night interior mirror
• Back-up light switch
• Driver side door control module (integral with window regulator motor)
• Front interior light
• Fuse 15a
• Fuse holder
• G44
• Hot in run or start
• Passenger side door control module (integral with window regulator motor)
• W/o convertible

Power Mirror Wiring Diagram for Audi A4 Quattro 2003

List of elements for Power Mirror Wiring Diagram for Audi A4 Quattro 2003:

• 22a
• De- fog
• Defogger system
• Door locks, interior lights systems
• Driver side door control module (integral with window regulator motor)
• Driver side mirror
• Fuse 15a
• Fuse holder
• G43 (behind right kick panel)
• G44 (behind left kick panel)
• Hot at all times
• Mirror adjustment switch
• Mirror selector switch
• Passenger side door control module (integral with window regulator motor)
• Passenger side mirror
• Red
• T10e
• T10f
• T16b
• T16c
• T32c

POWER SEATS

Heated Seats Wiring Diagram for Audi A4 Quattro 2003

List of elements for Heated Seats Wiring Diagram for Audi A4 Quattro 2003:

• (w/ convertible) g663
• 44a
• A/c control head
• Driver's backrest heating element
• Driver's seat heater
• Fuse 30a
• Fuse holder
• G44 (behind left kick panel)
• G78 (w/o convertible) (at base of right "b" pillar)
• Heated seat temp sensor
• Hot at all times
• Left vent temperature sensor
• Nca
• Passenger's backrest heating element
• Passenger's seat heater
• Right vent temperature sensor
• Seat heater
• Side bolster heater

Power Seats Wiring Diagram for Audi A4 Quattro 2003

List of elements for Power Seats Wiring Diagram for Audi A4 Quattro 2003:

• 4-pin relay carrier
• Driver's power seat switch
• Driver's seat fore/aft adjustment motor
• Driver's seat height adjustment motor
• Driver's seat inclination adjustment motor
• Driver's seat lumbar support adjustment switch
• Driver's seat lumbar support curvature adjustment motor
• Driver's seat lumbar support height adjustment motor
• Driver's seat seatback adjustment motor
• Front passenger seat lumbar support curvature adjustment motor
• Front passenger seat lumbar support height adjustment motor
• G77 (at base of left "b" pillar)
• G78 (at base of right "b" pillar)
• Hot at all times
• Passenger's power seat switch
• Passenger's seat fore/aft adjustment motor
• Passenger's seat height adjustment motor
• Passenger's seat inclination adjustment motor
• Passenger's seat lumbar support adjustment switch
• Passenger's seat seatback adjustment motor
• Power seat fuse 45 30a
• Power seat fuse 46 30a

POWER TOP/SUNROOF

Convertible Top Wiring Diagram (1 of 2) for Audi A4 Quattro 2003

List of elements for Convertible Top Wiring Diagram (1 of 2) for Audi A4 Quattro 2003:

• 30a
• Computer data lines system
• Convertible top compartment cover locking motor
• Convertible top comptartment latch switch
• Convertible top frame position sensor
• Convertible top lock switch (closed)
• Convertible top lock switch (open)
• Convertible top locking motor
• Convertible top operation control module (at right quarterpanel, behind trim)
• Convertible top operation switch
• Defogger system
• Fuse 30a
• Fuse holder
• G661
• G663
• Hardtop detector switch (if equipped)
• Hot at all times
• Interior lights system
• Nca

Convertible Top Wiring Diagram (2 of 2) for Audi A4 Quattro 2003

List of elements for Convertible Top Wiring Diagram (2 of 2) for Audi A4 Quattro 2003:

• 9-pin relay carrier (in instrument panel)
• Comfort system central control module (near base of left front seat)
• Compartment cover open position switch
• Convertible top closed position switch
• Convertible top compartment enclosure position switch
• Convertible top front lock switch
• Convertible top fuse 30a
• Convertible top hydraulic pump
• Convertible top hydraulic pump relay
• Convertible top hydraulic pump relay 2
• Convertible top open position switch
• Convertible top operation hydraulic unit (at left rear of vehicle)
• Convertible top right lock switch
• G661
• G663
• Hot at all times
• Left convertible top cover compartment cover switch
• Nca
• Power convertible top valve 1
• Power convertible top valve 2
• Power convertible top valve 3
• Right compartment cover locked switch 1

Sunroof Wiring Diagram for Audi A4 Quattro 2003

List of elements for Sunroof Wiring Diagram for Audi A4 Quattro 2003:

• (behind left kick panel)
• 30a
• Comfort system central control module (near base of left front seat, in electronics box)
• Front interior light
• Fuse 20a
• Fuse holder
• G44
• Hot at all times
• Nca
• Power windows system
• Sunroof motor assembly (at front center of roof, above interior lights)
• Sunroof switch

POWER WINDOWS

Power Windows Wiring Diagram, with Convertible for Audi A4 Quattro 2003

List of elements for Power Windows Wiring Diagram, with Convertible for Audi A4 Quattro 2003:

• (behind left kick panel)
• (behind right kick panel)
• 22a
• 4-pin relay carrier
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Door locks, mirrors, interior lights systems
• Driver side door control module (integral with window regulator motor)
• Fuse 15a
• Fuse holder
• G43
• G44
• G662
• G663
• Hot at all times
• Interior lights, mirrors systems
• Interior lights, mirrors, door locks systems
• Left front window regulator switch
• Left rear window regulator motor
• Left rear window regulator switch
• Left window motor
• Master power window switch
• Passenger door window regulator switch
• Passenger side door control module (integral with window regulator motor)
• Power window fuse 2 30a
• Power window fuse 37 30a
• Right front window regulator switch
• Right rear window regulator motor
• Right rear window regulator switch
• Right window motor
• T10e
• T10f
• T32c
• T32d
• Window regulator central switch

Power Windows Wiring Diagram, without Convertible for Audi A4 Quattro 2003

List of elements for Power Windows Wiring Diagram, without Convertible for Audi A4 Quattro 2003:

• (at base of left "b" pillar)
• (at base of right "b" pillar)
• (behind left kick panel)
• (behind right kick panel)
• 22a
• 23a
• 4-pin relay carrier
• Comfort system central control module (near base of left front seat, in electronics box)
• Computer data lines system
• Door locks, mirrors, interior lights systems
• Driver side door control module (integral with window regulator motor)
• Fuse 15a
• Fuse holder
• G43
• G44
• G77
• G78
• Hot at all times
• Interior lights system
• Interior lights, mirrors systems
• Interior lights, mirrors, door locks systems
• Left front window regulator switch
• Left rear door control module (integral with window regulator motor)
• Left rear window motor
• Left rear window regulator switch
• Left rear window switch
• Left window motor
• Master power window switch
• Passenger door window regulator switch
• Passenger side door control module (integral with window regulator motor)
• Power window fuse 2 30a
• Power window fuse 37 30a
• Rear window safety regulator switch
• Right front window regulator switch
• Right rear door control module (integral with window regulator motor)
• Right rear window motor
• Right rear window regulator switch
• Right rear window switch
• Right window motor
• T10e
• T10f
• T10g
• T10h
• T16d
• T16e
• T32c
• T32d

Rear Window Sun Shade Wiring Diagram for Audi A4 Quattro 2003

List of elements for Rear Window Sun Shade Wiring Diagram for Audi A4 Quattro 2003:

• 9-pin relay carrier (behind left side of dash)
• Fuse 10a
• Fuse holder (left end of dash)
• G50 (left side of luggage compt)
• Hot at all times
• Hot in on or start
• Interior lights system
• Nca
• Rear shade circuit breaker 10a
• Rear window shade control module (under left side of rear shelf)
• Rear window shade motor
• Rear window shade switch

RADIO

Radio Wiring Diagram, with Convertible, with Bose for Audi A4 Quattro 2003

List of elements for Radio Wiring Diagram, with Convertible, with Bose for Audi A4 Quattro 2003:

• (left rear of luggage compt) control module for navigation w/ cd-mechanism
• 39a
• Airbag spiral spring/ return spring w/ slip ring
• Amplifier
• Cd changer unit
• Comfort system central control module (near base of left front seat, in e-box)
• Computer data lines system
• Fuse 20a
• Fuse holder
• G610 (under front center console)
• Hot at all times
• Inside loudspeaker (center speaker)
• Instrument cluster
• Instrument cluster system
• Left antenna module
• Left front bass speaker
• Left front dsp midrange speaker
• Left front treble speaker
• Left rear speaker
• Nca
• Radio
• Radio controls
• Red
• Right antenna module
• Right front bass speaker
• Right front dsp midrange speaker
• Right front treble speaker
• Right rear speaker
• Steering column electronic systems control module (at top of steering column)
• Steering wheel control unit
• T10i
• T16a
• T20d
• T20e
• T32
• T32a
• T8a

Radio Wiring Diagram, with Convertible, without Bose for Audi A4 Quattro 2003

List of elements for Radio Wiring Diagram, with Convertible, without Bose for Audi A4 Quattro 2003:

• (left rear of luggage compt) control module for navigation w/ cd-mechanism
• (under front center console) g610
• 39a
• Amplifier
• Cd changer unit
• Comfort system central control module (near base of left front seat, in e-box)
• Computer data lines system
• Fuse 20a
• Fuse holder
• G610 (under front center console)
• Hot at all times
• Inside loudspeaker (center speaker)
• Instrument cluster system
• Left antenna module
• Left front bass speaker
• Left front dsp midrange speaker
• Left front treble speaker
• Left rear speaker
• Nca
• Radio
• Red
• Right antenna module
• Right front bass speaker
• Right front dsp midrange speaker
• Right front treble speaker
• Right rear speaker
• T10i
• T20d
• T20e
• T8a

Radio Wiring Diagram, without Convertible, with Amplifier for Audi A4 Quattro 2003

List of elements for Radio Wiring Diagram, without Convertible, with Amplifier for Audi A4 Quattro 2003:

• (left rear of luggage compt) control module for navigation w/ cd-mechanism
• (under front center console) g610
• 39a
• Amplifier
• Antenna
• Avant
• Bass loudspeaker
• Cd changer unit
• Comfort system central control module (near base of left front seat, in e-box)
• Computer data lines system
• Except avant
• Fuse 20a
• Fuse holder
• G610 (under front center console)
• Hot at all times
• Inside loudspeaker (center speaker)
• Instrument cluster system
• Left antenna module
• Left front bass speaker
• Left front midrange speaker
• Left rear bass speaker
• Left rear midrange speaker
• Left rear side window
• Nca
• Operating electronics & telephone control module
• Radio
• Rear window defogger w/ window antenna
• Red
• Right front bass speaker
• Right front midrange speaker
• Right rear bass speaker
• Right rear midrange speaker
• Right rear side window
• T10i
• T18
• T20d
• T20e
• T8a
• Telephone circuit
• W/ alarm system
• W/ telephone

Radio Wiring Diagram, without Convertible, with Bose for Audi A4 Quattro 2003

List of elements for Radio Wiring Diagram, without Convertible, with Bose for Audi A4 Quattro 2003:

• (left rear of luggage compt) control module for navigation w/ cd-mechanism
• 39a
• Airbag spiral spring/ return spring w/ slip ring
• Amplifier
• Antenna
• Avant
• Bass loudspeaker
• Cd changer unit
• Comfort system central control module (near base of left front seat, in e-box)
• Computer data lines system
• Except avant
• Fuse 20a
• Fuse holder
• G610 (under front center console)
• Hot at all times
• Inside loudspeaker (center speaker)
• Instrument cluster
• Instrument cluster system
• Left antenna module
• Left front bass speaker
• Left front midrange speaker
• Left rear bass speaker
• Left rear midrange speaker
• Left rear side window
• Nca
• Operating electronics & telephone control module
• Radio
• Radio controls
• Rear window defogger w/ window antenna
• Red
• Right front bass speaker
• Right front midrange speaker
• Right rear bass speaker
• Right rear midrange speaker
• Right rear side window
• Steering column electronic systems control module (at top of steering column)
• Steering wheel control unit
• T10i
• T16a
• T18
• T20d
• T20e
• T32
• T32a
• T8a
• Telephone circuit
• W/ alarm system
• W/ telephone

Radio Wiring Diagram, without Convertilbe, without Amplifier for Audi A4 Quattro 2003

List of elements for Radio Wiring Diagram, without Convertilbe, without Amplifier for Audi A4 Quattro 2003:

• (left rear of engine compt) control module for navigation w/ cd-mechanism
• 39a
• Antenna
• Avant
• Cd changer unit
• Comfort system central control module (near base of left front seat, in e-box)
• Computer data lines system
• Except avant
• Fuse 20a
• Fuse holder
• G610 (under front center console)
• Hot at all times
• Instrument cluster system
• Left antenna module
• Left front bass speaker
• Left front midrange speaker
• Left rear bass speaker
• Left rear midrange speaker
• Left rear side window
• Nca
• Operating electronics & telephone control module
• Radio
• Rear window defogger w/ window antenna
• Red
• Right front bass speaker
• Right front midrange speaker
• Right rear bass speaker
• Right rear midrange speaker
• Right rear side window
• T10i
• T18
• T20d
• T20e
• T8a
• Telephone circuit
• W/ alarm system
• W/ telephone

SHIFT INTERLOCK

Shift Interlock Wiring Diagram, with CVT for Audi A4 Quattro 2003

List of elements for Shift Interlock Wiring Diagram, with CVT for Audi A4 Quattro 2003:

• (on shift lever assembly) shift lock solenoid
• After-run auto transmission fuse
• Fuse s286 15a
• G43 (lower right "a" pillar)
• Hot w/ ecm relay energized
• Tiptronic switch
• Transmission control module (tcm) (in plenum chamber e-box, at left rear of engine compt)

Shift Interlock Wiring Diagram, with Tiptronic, without CVT for Audi A4 Quattro 2003

List of elements for Shift Interlock Wiring Diagram, with Tiptronic, without CVT for Audi A4 Quattro 2003:

• 31a
• Fuse 15a
• Fuse holder (left end of dash)
• Hot in run or start
• Shift lock solenoid (on shift lever assembly)
• Tiptronic switch
• Transmission control module (tcm) (in plenum chamber e-box, at left rear of eng compt)

STARTING/CHARGING

Charging Wiring Diagram for Audi A4 Quattro 2003

List of elements for Charging Wiring Diagram for Audi A4 Quattro 2003:

• 1.8l only
• Acc
• Battery
• Fuse 150a
• Fuse strip (main fuse)
• G11 (at rear of engine compt, at base of windshield)
• Generator
• Generator warning light
• Ignition/ starter switch
• Instrument cluster
• Motronic engine control module (in plenum chamber e-box, at left rear of eng compt)
• Nca
• Off
• Red
• Run
• Start
• Starter
• T32a

Starting Wiring Diagram, 5 Speed A/T for Audi A4 Quattro 2003

List of elements for Starting Wiring Diagram, 5 Speed A/T for Audi A4 Quattro 2003:

• 50z
• Acc
• Battery
• Charging circuit
• Fuse 150a
• Fuse strip (main fuse)
• G11 (at rear of eng compt, near base of windshield)
• G12 (on left center of firewall, near coolant reservoir)
• Ignition/ starter switch
• Multi-function transmission range (tr) switch
• Nca
• Off
• Red
• Run
• Start
• Starter
• Starter interlock alarm system relay

Starting Wiring Diagram, M/T for Audi A4 Quattro 2003

List of elements for Starting Wiring Diagram, M/T for Audi A4 Quattro 2003:

• (behind right kick panel) g43 (w/ conv) g33 (w/o conv) (behind right side of dash)
• Acc
• Battery
• Charging circuit
• Clutch vacuum vent valve switch
• Fuse 150a
• Fuse strip (main fuse)
• G11 (at rear of eng compt, near base of windshield)
• Ignition/ starter switch
• Nca
• Off
• Red
• Run
• Start
• Starter
• Starter locking relay (clutch pedal switch)

Starting Wiring Diagram, with CVT for Audi A4 Quattro 2003

List of elements for Starting Wiring Diagram, with CVT for Audi A4 Quattro 2003:

• 50a
• 50z
• Acc
• Battery
• Charging circuit
• Fuse 150a
• Fuse strip (main fuse)
• G11 (at rear of eng compt, near base of windshield)
• Ignition/ starter switch
• Nca
• Off
• P/n
• Park/ neutral position (pnp) relay
• Red
• Run
• Start
• Starter
• Transmission control module (tcm) (in plenum chamber e-box, at left rear of eng compt)

SUPPLEMENTAL RESTRAINTS

Supplemental Restraints Wiring Diagram, with Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Supplemental Restraints Wiring Diagram, with Convertible (1 of 2) for Audi A4 Quattro 2003:

• Acc
• Air bag control module (below center console)
• Air bag spiral spring/return spring w/slip ring
• Comfort system central control module (near base of left front seat, in e box)
• Driver's side air bag igniter
• Driver's side side air bag igniter
• G109
• High bus
• Hot at all times
• Ignition starter/ switch
• Left rear seat belt tensioner igniter
• Low bus
• Motronic engine control module (ecm) (in plenum chamber e box, at left rear of eng compt)
• Nca
• Off
• Passenger's side air bag igniter 1
• Passenger's side side air bag igniter
• Red
• Right rear seat belt tensioner igniter
• Run
• Shorting contact
• Solid state
• Start
• Telephone/telematic control module (near base of right front seat, in e box)

Supplemental Restraints Wiring Diagram, with Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Supplemental Restraints Wiring Diagram, with Convertible (2 of 2) for Audi A4 Quattro 2003:

• Air bag control module (below center console)
• Air bag malfunction indicator lamp (mil)
• Data link connector (dlc) (under left side of dash)
• Driver's front air bag crash sensor (near left headlight)
• Driver's seat belt tensioner igniter 1
• Driver's side side air bag crash sensor (inside left "b" pillar)
• G109
• Instrument cluster
• Left rollover solenoid
• Left seat belt switch
• Nca
• Pass side air bag off ind
• Passenger's front air bag crash sensor (near right headlight)
• Passenger's seat belt tensioner igniter 2
• Passenger's side side air bag crash sensor (inside right "b" pillar)
• Red
• Right rollover solenoid
• Right seat belt switch
• Shorting contact
• Solid state
• T32a

Supplemental Restraints Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003

List of elements for Supplemental Restraints Wiring Diagram, without Convertible (1 of 2) for Audi A4 Quattro 2003:

• (at base of right "b" pillar) g78
• (at base of left "b" pillar) g77
• Acc
• Air bag control module (below center console)
• Air bag spiral spring/return spring w/slip ring
• Comfort system central control module (near base of left front seat, in e box)
• Driver's side air bag igniter
• Driver's side head air bag igniter (if equipped)
• Driver's side side air bag igniter
• Driver's side side rear air bag igniter
• G109
• High bus
• Hot at all times
• Ignition starter/ switch
• Left rear seat belt tensioner igniter
• Low bus
• Motronic engine control module (ecm) (in plenum chamber e box, at left rear of eng compt)
• Nca
• Off
• Passenger's side air bag igniter 1
• Passenger's side head air bag igniter (if equipped)
• Passenger's side side air bag igniter
• Passenger's side side rear air bag igniter
• Red
• Right rear seat belt tensioner igniter
• Run
• Sedan only
• Shorting contact
• Solid state
• Start
• Telephone/telematic control module (near base of right front seat, in e box)

Supplemental Restraints Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003

List of elements for Supplemental Restraints Wiring Diagram, without Convertible (2 of 2) for Audi A4 Quattro 2003:

• Air bag control module (below center console)
• Air bag malfunction indicator lamp (mil)
• Center rear seat belt tensioner igniter
• Data link connector (dlc) (under left side of dash)
• Driver's front air bag crash sensor (near left headlight)
• Driver's seat belt tensioner igniter 1
• Driver's side side air bag crash sensor (inside left "b" pillar)
• Driver's side side rear air bag crash sensor (behind left outer bolster of rear seat)
• Front interior light
• G109
• Instrument cluster
• Left seat belt switch
• Nca
• Pass side air bag off ind
• Passenger's front air bag crash sensor (near right headlight)
• Passenger's seat belt tensioner igniter 2
• Passenger's side side air bag crash sensor (inside right "b" pillar)
• Passenger's side side rear air bag crash sensor (behind right outer bolster of rear seat)
• Red
• Right seat belt switch
• Shorting contact
• Solid state
• T32a

TRANSMISSION

A/T Wiring Diagram, with CVT for Audi A4 Quattro 2003

List of elements for A/T Wiring Diagram, with CVT for Audi A4 Quattro 2003:

• (left side of engine compt)
• (lower right "a" pillar) g43
• 31a
• 50b
• Computer data lines system
• Data link connector (below
• Engine control module
• Exterior lights system (backup lights)
• Fuse 10a
• Fuse 15a
• Fuse for automatic transmission
• Fuse holder (left kick panel)
• G12
• Hot at all times
• Hot w/ ecm relay energized
• Ignition switch
• Instrument cluster
• Interior lights system
• Left side of dash)
• Off
• Park/ neutral position (pnp) relay (in e-box plenum chamber)
• Run
• Shift lock solenoid (under center console)
• Start
• Starting system (starter)
• T32a
• Tiptronic switch (in shift mechanism cover)
• Transmission control module (tcm) (back end of transmission)

A/T Wiring Diagram, without CVT for Audi A4 Quattro 2003

List of elements for A/T Wiring Diagram, without CVT for Audi A4 Quattro 2003:

• (in shift meachanism cover) tiptronic switch
• (lower
• (pins 56-84 not used)
• (under center console) shift lock solenoid
• 31a
• Computer data lines system
• Data link connector (below left side of dash)
• Engine compt)
• Engine control module (left plenum chamber, in e-box)
• Exterior lights system (backup)
• Fuse 10a
• Fuse 15a
• Fuse holder (left kick panel)
• G12 (left side
• G12 (left side of
• G43
• Hot at all times
• If equipped
• Ignition switch
• Instrument cluster
• Interior lights system
• Multifunction transmission range switch (left side of transmission)
• Of engine compt)
• Off
• Pressure control valves
• Red
• Right "a" pillar)
• Run
• Solenoid valves
• Start
• Starting system (interlock relay)
• T32a
• Transmission control module (tcm) (left plenum chamber, in e-box)
• Transmission fluid temperature sensor
• Transmission output speed sensor (on trans housing)
• Transmission speed sensor (on trans housing)
• Valve body

TRUNK, TAILGATE, FUEL DOOR

Trunk & Fuel Door Release Wiring Diagram for Audi A4 Quattro 2003

List of elements for Trunk & Fuel Door Release Wiring Diagram for Audi A4 Quattro 2003:

• (w/o convertible) g50 (left side of luggage compt)
• Comfort system central control module (near base of left front seat, in electronics box)
• Fuel tank lid unlock motor
• G662 (w/ convertible)
• Rear lid unlock motor
• Remote power trunk lid release/ fuel tank lid release switches info not available

WARNING SYSTEMS

Warning Systems Wiring Diagram for Audi A4 Quattro 2003

List of elements for Warning Systems Wiring Diagram for Audi A4 Quattro 2003:

• (w/o convertible) g33 (behind right side of dash)
• 15a
• Acc
• Buzzer
• Fuse 10a
• Fuse holder (left end of dash)
• G12 (on left center of firewall, near coolant reservoir)
• G49 (w/ convertible) (behind left side of dash)
• Hot at all times
• Ignition switch
• Instrument cluster
• Key switch
• Left front brake pad wear sensor
• Nca
• Off
• Red
• Right front brake pad wear sensor
• Run
• Start
• T32
• T32a

WIPER/WASHER

Jet Heater Wiring Diagram for Audi A4 Quattro 2003

List of elements for Jet Heater Wiring Diagram for Audi A4 Quattro 2003:

• (w/ convertible) g49 (behind left side of dash)
• Fuse 5a
• Fuse holder (left end of dash)
• G33 (w/o convertible) (behind right side of dash)
• Hot in run
• Left washer nozzle heater
• Right washer nozzle heater

Wiper/Washer Wiring Diagram for Audi A4 Quattro 2003

List of elements for Wiper/Washer Wiring Diagram for Audi A4 Quattro 2003:

• (avant)
• (behind left side of dash) (w/ convertible) g49
• (w/ convertible)
• (w/o convertible)
• (w/o convertible) g43 (behind right kick panel)
• 13a
• 36a
• 37a
• Acc
• Acc run
• Computer data lines system
• Fuse 10a
• Fuse 150a
• Fuse 25a
• Fuse holder
• Fuse strip (main fuse)
• G44 (behind left kick panel)
• G49 (w/ convertible) (behind left side of dash)
• G53 (right rear trunk lid)
• Headlight washer pump
• Hot at all times
• Hot with load reduction relay energized
• Ignition/ starter switch
• Nca
• Off
• Rear windshield wiper motor (avant)
• Red
• Run
• Start
• Steering column electronic systems control module (top of steering column)
• T10b
• T16a
• T23
• T32b
• Vehicle electrical system control module (behind left side of dash, below 9 pin relay carrier)
• W/ avant
• Windshield washer pump
• Windshield wiper motor
• Windshield wiper/washer switch