All Wiring Diagrams for Subaru Legacy L 2003

AIR CONDITIONING

Manual A/C Wiring Diagram for Subaru Legacy L 2003

List of elements for Manual A/C Wiring Diagram for Subaru Legacy L 2003:

(at left front of engine compt)
(at right front of engine compt) sub fan motor
(behind right side
(on right side of upper intake unit case) fresh/recirc actuator
A/c pressure switch (on a/c receiver-drier)
A/c relay holder (in main fuse box)
Air conditioning relay
B134
B135
B136
B137
B152
B52
Blower motor (behind right side of dash)
Blower motor resistor (behind right side of dash)
Blower relay (at left kick panel)
Combination meter
Engine control module (behind right side of dash)
Engine controls system
Engine coolant temperature sensor & thermometer (at top front of engine, on water pipe)
Evaporator thermoswitch
F27
F41
Fuse & relay box (f/b)
Fuse 15a
Fuse 20a
Gb-2
Gb-5 (under front of center console)
Gb-7 (at front left side of center console)
Hot at all times
Hot in on or start
I12
I15
I17
Interior lights system
Joint connector shield & sensor ground
Magnet clutch
Main fan relay
Mode actuator (behind center of dash)
Mode control panel
Nca
Of dash, on intake unit case)
Radiator main fan motor (at left front of engine compt)
Rear defogger relay
Red
Sub fan relay

ANTI-LOCK BRAKES

Anti-lock Brakes Wiring Diagram, without Traction Control for Subaru Legacy L 2003

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List of elements for Anti-lock Brakes Wiring Diagram, without Traction Control for Subaru Legacy L 2003:

(w/o cruise)
Abs "g" sensor (below center console)
Abs control module (at right side of engine compartment)
Abs indicator
Abs motor ground
Acc
B152
B158
B54
Check connector (behind center of dash)
Combination meter
Data link connector (under left side of dash)
Diagnosis connector (behind center of dash)
F34
F37
F41
F68
Fl in
Fl out
Fr in
Fr out
Fuse & relay box
Fuse 16 20a
Fuse 18 15a
Fuse 5 15a
Fuse 8 30a
Gb-2 (at left front of engine compartment)
Gb-3 (at rear of engine compt)
Hot at all times
Hot in on or start
I10
I12
Ignition relay (in relay block)
Ignition switch
Left front abs sensor
Left rear abs sensor
Main fuse box (at left side of engine compt, at rear of battery)
Motor relay
Nca
Off
Pnk
Pump motor
Red
Right front abs sensor
Right rear abs sensor
Rl in
Rl out
Rr in
Rr out
Sbf holder (at left side of engine compt)
Sbf-5 fuse 30a
Sbf-7 fuse 30a
Solenoid valve
Start
Stoplight switch (on brake pedal bracket)
Transmission control module (behind left side of dash)
Twisted wire
Valve relay

ANTI-THEFT

Power Door Locks Wiring Diagram, with Keyless Entry for Subaru Legacy L 2003

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List of elements for Power Door Locks Wiring Diagram, with Keyless Entry for Subaru Legacy L 2003:

(behind left side of dash) integrated module
3.0l
Acc
B152
B158
B280
B281
B52
B59
Combination meter
Diode (rear gate) (wagon) (behind right side of dash)
Driver's side door lock switch
Driver's side front door lock actuator
Exterior lights system
F40
F68
Fuse & relay box
Fuse & relay box
Fuse 2 15a
Fuse 3 15a
Fuse 7 20a
Gb-5 (under front of center console)
Gb-7 (at front left side of center console)
Gb-8 (under right front seat)
Horns system
Hot at all times
I10
I12
I73
Ignition relay (in relay block)
Ignition switch
Interior lights system
Interrupt relay (security) (behind left side of dash)
Keyless buzzer
Keyless entry control module (behind right side of dash)
Left front door switch
Left rear door lock actuator
Left rear door switch
Main fuse box
Off
Passenger's side door lock switch
Passenger's side front door lock actuator
Rear gate latch switch (wagon)
Rear gate lock actuator (wagon)
Red
Right front door switch
Right rear door lock actuator
Right rear door switch
Security control module (behind center of dash)
Security horn (at right side of engine compt)
Security horn relay
Security indicator
Start
Starting/ charging system
Trunk room light switch (sedan)
Vehicle interface module (behind lower right side of dash)
W/ onstar
W/o onstar
Warning system

BODY CONTROL MODULES

Body Control Modules Wiring Diagram for Subaru Legacy L 2003

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List of elements for Body Control Modules Wiring Diagram for Subaru Legacy L 2003:

B152
B280
B281
B52
Door locks system
F40
F68
Fuse & relay box (f/b) (behind left side dash)
Fuse 11 15a
Fuse 2 15a
Fuse 3 15a
Fuse 4 20a
Gb-3 (rear of engine compt)
Hot at all times
Hot in acc or on
Hot in on or start
Integrated module (behind left end of dash)
Interior lights system
Main fuse box (m/b) (on left side of engine compt)
Red
Shift interlock system
Warnings system
Wiper/washer system

COMPUTER DATA LINES

2.5L

2.5L, Computer Data Lines Wiring Diagram for Subaru Legacy L 2003

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List of elements for 2.5L, Computer Data Lines Wiring Diagram for Subaru Legacy L 2003:

(behind center of dash)
Abs control module (at right side of engine compt)
Air bag control module
Air bag ind
B135
B136
B137
B54
B55
B56
B75
B76
B94
Check connector (behind center of dash)
Combination meter
Cruise control module (behind right side of dash)
Data link connector (under left
Diagnosis connector
Diagnosis terminal
Engine control module (behind right side of dash)
F37
Fuel pump assembly (on top of fuel tank)
Gb-5 (under front of center console)
Ge (on right rear of engine)
Hot at all times
Hot in on or start
I10
I12
Ignition relay (in relay block)
Line end check connector
M/t
Main fuse box (at left side of engine compartment, at rear of battery)
Neutral position switch (m/t)
Red
Sbf-5 fuse 30a
Shift
Side of dash)
Test mode connector
Transmission control module (a/t) (behind left side of dash)
Vehicle speed sensor (on right side of transmission)
W/ sport
W/o sport

COOLING FAN

Cooling Fan Wiring Diagram for Subaru Legacy L 2003

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List of elements for Cooling Fan Wiring Diagram for Subaru Legacy L 2003:

(at left front of engine compt)
(at right front of engine compt)
(at top front of engine, on water pipe)
A/c relay holder (in main fuse box)
B134
B135
Combination meter
Coolant
Engine control module (behind right side of dash)
Engine controls system
Engine temperature sensor thermometer
F27
F41
Fuse & relay box
Fuse 17 15a
Fuse 18 15a
Fuse 20a
Gb-2 (at left front of engine compt)
Hot at all times
Hot in on or start
I12
Junction connector shield & sensor ground
Main fan
Radiator main fan motor
Relay
Relay
Sub fan motor
Sub-fan

CRUISE CONTROL

Cruise Control Wiring Diagram for Subaru Legacy L 2003

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List of elements for Cruise Control Wiring Diagram for Subaru Legacy L 2003:

(a/t)
A/t
Acc
Anti-theft system
B158
B52
B54
B55
Cancel
Check connector (behind center of dash)
Clutch switch (on clutch pedal bracket)
Cruise control
Cruise control actuator (at right side of engine compt)
Cruise control module (behind right side of dash)
Data link connector (under left side of dash)
F68
Fuse & relay box
Fuse 15a
Fuse 16 20a
Fuse 18 15a
Gb-3 (at rear of engine compt)
Gb-5 (under front of center console)
Ge (on right rear of engine)
Horns system
Hot at all times
Hot in on or start
Ignition relay
Ignition switch
Illum
Inhibitor switch (on right side of transmission case)
Interior lights system
Interrupt relay (behind left side of dash)
M/t
Main fuse box (at rear of battery)
Main switch
Off
P/n
Resume
Set
Short connector
Starting/ charging system
Stoplight & brake switch (on brake pedal bracket)
Sub switch
Transmission control module (a/t) (behind left side of dash)
Vehicle speed sensor (m/t) (on right side of transmission)
W/ security
W/ security control module connector model
W/o security
W/o security control module connector model

DEFOGGERS

Heated Mirrors Wiring Diagram for Subaru Legacy L 2003

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List of elements for Heated Mirrors Wiring Diagram for Subaru Legacy L 2003:

(at rear of engine compartment) gb-3
B52
Fuse & relay box
Fuse 4 20a
Hot in acc or on
Left rearview mirror
Mirror heater
Mirror heater switch
Nca
Off
Remote control rearview mirror switch
Right rearview mirror

Rear Defogger Wiring Diagram for Subaru Legacy L 2003

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List of elements for Rear Defogger Wiring Diagram for Subaru Legacy L 2003:

2.5l
3.0l
A/c auto control module (behind center of dash)
Acc
B134
B137
B152
B158
Engine control module (behind right side of dash)
F40
F68
Fuse & relay box
Fuse 1 20a
Gb-8 (under right front seat)
Gb-8 (w/ choke coil) (under right front seat)
Gd (w/o choke coil) (at top center of trunk)
Hot at all times
I17
I48
Ignition switch
Main fuse box (at left side of engine compartment, at rear of battery)
Mode control panel
Nca
Off
Rear defogger
Rear defogger condenser (at right front corner of trunk)
Rear defogger relay
Red
Sedan
Start
W/ automatic a/c
W/ choke coil
W/ manual a/c
Wagon

Wiper Deicer Wiring Diagram for Subaru Legacy L 2003

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List of elements for Wiper Deicer Wiring Diagram for Subaru Legacy L 2003:

B158
B280
B281
B52
Fuse & relay box
Fuse 15a
Fuse 20a
Gb-3 (at rear of engine compartment)
Gb-7 (at front left side of center console)
Hot at all times
Hot in on or start
Illum
Integrated module (behind left side of dash)
Interior lights system
On ind
On switch
Wiper de-icer relay (in relay block)
Wiper deicer
Wiper deicer switch

ENGINE PERFORMANCE

2.5L

2.5L, Engine Performance Wiring Diagram (1 of 3) for Subaru Legacy L 2003

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List of elements for 2.5L, Engine Performance Wiring Diagram (1 of 3) for Subaru Legacy L 2003:

(behind left side of dash) interrupt relay
(on left side of engine) egr solenoid valve
(right kick panel) main relay
A/c system
A/t
Acc
B135
B136
Camshaft position sensor (on left camshaft support)
Crankshaft position sensor (front of eng, on oil pump)
Day time running light control module & starter motor
Engine control module (behind right side of dash)
Gb-3 (rear of engine compt)
Ge (right rear of eng)
Hot at all times
Ignition switch
Inhibitor switch (right side of transmission case)
Knock sensor (top rear of eng)
M/t
Nca
Neutral position switch (on transfer case)
Off
Pnk
Power steering oil pressure switch (on power steering oil pump)
Red
Shielded
Short connector
Start
Starter interlock relay (behind left side of dash)
Starting system
Starting/ charging system
W/ anti-theft
W/o anti-theft (w/ security conn)
W/o anti-theft (w/o security conn)

2.5L, Engine Performance Wiring Diagram (2 of 3) for Subaru Legacy L 2003

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List of elements for 2.5L, Engine Performance Wiring Diagram (2 of 3) for Subaru Legacy L 2003:

(at center of dash) check connector
(at center of dash) data link connector
(on fuel tank) fuel tank pressure sensor
(or red)
(right rear of eng) ge
(right side of dash) shielded & sensor ground joint connector
(under right front seat) gb-8
A/t
B152
B158
Engine coolant temperature sensor & thermometer (top front or eng, on water pipe)
Front oxygen sensor (a/f) (front of catalytic converter)
Fuel gauge sub module (on top of fuel tank)
Fuel level sensor
Fuel pump assembly (on top of fuel tank)
Fuel pump condenser (sedan)
Fuel pump relay (behind left side of dash)
Fuel sub level sensor
Fuel temp sensor
Fuse & relay box (behind left side of dash)
Fuse 15a
Ge (right rear of eng)
Hot at all times
Hot in on or start
Instru- ment cluster system
Intake air temp- erature sensor (on air cleaner case)
Line end check connector
M/t
Nca
Pnk
Pressure sensor (top rear of engine)
Rear oxygen sensor (rear of catalytic converter)
Red
Shielded
Throttle position sensor (on throttle body)
Vehicle speed sensor (m/t) (right side of transmission)

2.5L, Engine Performance Wiring Diagram (3 of 3) for Subaru Legacy L 2003

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List of elements for 2.5L, Engine Performance Wiring Diagram (3 of 3) for Subaru Legacy L 2003:

(center rear of fuel tank) pressure control solenoid valve
(in relay block) ignition relay
(on intake manifold) air assist injector solenoid valve
(on intake manifold) purge control solenoid valve
(rear center of vehicle) internal pressure solenoid valve
(right rear corner of vehicle) atmospheric pressure solenoid
A/c system
B134
B137
B152
B54
B55
B56
Combination meter
Cooling fans system
Custom cpu
Defogger system
Engine control module (behind right side of dash)
Exterior lights system
F37
F68
Fuel injectors
Fuse & relay box (behind left side of dash)
Fuse 15a
Fuse sbf-5 30a
Gb-3 (rear of engine compt)
Ge (right rear of eng)
Hot at all times
I/f
I10
I11
I12
I15
Idle air control solenoid valve (on throttle body)
Ignition coil & ignitor (top front of eng)
Main fuse box
Mal- function indicator lamp
Op connector (behind center of dash)
Pnk
Shielded
Speedo- meter circuit
Tacho- meter
Test mode connector (behind center of dash)
Transmission control module (behind left side of dash)
W/ sports shift
W/o sports shift

EXTERIOR LIGHTS

Back-up Lamps Wiring Diagram for Subaru Legacy L 2003

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List of elements for Back-up Lamps Wiring Diagram for Subaru Legacy L 2003:

A/t
B52
Back-up light
Back-up light switch (on transfer case)
Connector (behind left center of dash)
Fuse & relay box
Fuse 18 15a
Gb-9 (wagon: at right rear quarterpanel) (sedan: at top center of trunk)
Hot in on or start
Inhibitor switch (on right side of transmission case)
Left finisher light
M/t
Right finisher light

Exterior Lamps Wiring Diagram for Subaru Legacy L 2003

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List of elements for Exterior Lamps Wiring Diagram for Subaru Legacy L 2003:

(behind right side of dash) keyless entry control module
(sedan)
(wagon)
(wagon) (sedan)
(wagon: at right
B152
B158
B52
B69
B71
Combination meter
Combination switch
Control
F36
F37
F40
F41
F68
Fuse & relay box
Fuse 10 15a
Fuse 16 20a
Fuse 5 10a
Fuse 5 15a
Fuse 6 15a
Fuse 7 20a
Gb-1 (at right front of engine compt)
Gb-3 (at rear of engine compt)
Gb-7 (at front left side of center console)
Hazard switch
Head
High mounted stop light
High mounted stop light (sedan w/ rear spoiler)
Hot at all times
Hot in on or start
I10
I11
Ignition relay (in relay block)
Interior lights system
Left front clearance light
Left front turn signal light (lower)
Left front turn signal light (upper)
Left license plate light
Left rear combination lamp
Left rear finisher light
Left turn ind
License plate light
Light switch
Main fuse box (at left side of engine compt, at rear of battery)
Nca
Off
Park
Parking switch
Rear quarterpanel) (sedan: at top center of trunk) gb-9
Right front clearance light
Right front turn signal light (lower)
Right front turn signal light (upper)
Right license plate light
Right rear combination lamp
Right rear finisher light
Right turn ind
Sbf-2 fuse 50a
Security control module (behind center of dash)
Sedan
Stop & brake switch (on brake pedal braket)
Stop- light
Stoplight switch (on brake pedal braket)
Tail & illumination relay
Tail- light
Trailer connector
Turn light
Turn signal & hazard module (behind left side of dash)
Turn signal switch
W/ cruise
W/o cruise
Wagon

GROUND DISTRIBUTION

Ground Distribution Wiring Diagram (1 of 2) for Subaru Legacy L 2003

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List of elements for Ground Distribution Wiring Diagram (1 of 2) for Subaru Legacy L 2003:

(2.5l)
(3.0l)
(w/ vdc, w/ sport shift model)
(w/o vdc, w/o sport shift model)
2.5l
3.0l
Abs control module
B134
B135
B136
B137
B181
B182
B242
B281
B54
B55
B56
B70
B71
Check connector
Clutch switch (m/t)
Combination
Combination meter
Compressor
Data link connector
Daytime running light control module
Daytime running light relay (4 light model)
Engine control module
F49
F73 (abs motor ground) (at right side of engine compt)
Fan ground joint connector (3.0l)
Fan relay (3.0l)
Fuel level sensor
Fuel pump & fuel guage module
Fuel pump relay (3.0l)
Fwd switch
Gb-1 (at right front of engine compt)
Gb-10 (3.ol: at rear of engine compt)
Gb-2 (at left front of engine compt)
Gb-3 (2.5l: at rear of engine compt)
Ge (on right rear of engine)
I12
Idle speed control valve
Ignition coil & ignitor
Ignition relay
Integrated module
Keyless registration connector
Keylock solenoid (a/t)
Left front abs sensor shield nca
Left front clearance light
Left front foglight
Left front turn signal light (lower)
Left front turn signal light (upper)
M/t
Main fan motor
Nca
Neutral position switch (m/t)
Onstar (3.0l)
Option connector
Power window main switch
Power window relay
Relay block
Remote controlled rearview mirror switch
Right front abs sensor shield
Right front clearance light
Right front foglight
Right front turn signal light (lower)
Right front turn signal light (upper)
Secondary & primary pressure sensor shield
Shield & sensor ground joint connector
Shield joint connector (vdc)
Sport shift switch (2.5l, m/t)
Steering angle sensor (vdc)
Sub fan motor
Switch
Test mode connector
To combination meter (diagram 2 of 2)
To ground gb-5 (diagram 2 of 2)
Transmission control module
Turn & hazard module
Vdc module
Vehicle speed sensor (m/t)
Wiper deicer
Yaw rate sensor shield

Ground Distribution Wiring Diagram (2 of 2) for Subaru Legacy L 2003

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List of elements for Ground Distribution Wiring Diagram (2 of 2) for Subaru Legacy L 2003:

(w/ on star) (w/o on star)
(wagon)
(wagon) (at right rear quarterpanel)
(wagon) trailer connector
A/c pressure switch (3.0l)
A/t select lever illumi- nation light
Ab6
Air bag control module
Ashtray illumi- nation light
Auto a/c control module
Blower motor resistor (3.0l)
Brake fluid level warning switch
Coil)
Combination meter
Compass mirror
Cruise control actuator
Cruise control module
Diagnosis terminal
From ground gb-3 (diagram 1 0f 2)
Front fog light switch
Front tilt limit switch
Front wiper motor
Fuel pump assembly (w/o fpc)
Fuel pump con- denser
Fuel pump control module (w/ fpc)
Fuel pump control solenoid (w/ fpc)
Gb-11 (at left rear door sill)
Gb-4 (at rear of engine compt)
Gb-5 (under front of center console)
Gb-6 (under front of center console)
Gb-7 (at front left side of center console)
Gb-8 (under right front seat)
Gb-9
Gb-9 (sedan) (at top center of trunk)
Gd (at top center of trunk)
Glove box illumi- nation light
Gr (under right front of center console)
High mounted stop light
High- mounted stop light
High- mounted stop light (rear spoiler)
I10
I11
I15
I17
I49
Inhibitor switch (a/t)
Keyless entry control module
Left front door switch
Left license plate light
Left rear combination light
Left rear door switch
Left rear finisher light
Left seat heater
Left seat heater switch
Left vanity mirror illumi- nation light
License plate light
Main relay
Manual door lock switch
Mode actuator
Mode control panel (manual a/c)
Module (w/ on star)
Power amplifier (w/ mcintosh)
Power seat
Radio
Rear defogger
Rear defogger (w/ choke
Rear defogger (w/o fpc) (sedan)
Rear defogger condenser
Rear gate latch switch
Rear tilt limit switch
Rear wiper inter- mittent module
Rear wiper motor
Reclining switch
Right front door switch
Right license plate light
Right rear combination light
Right rear door switch
Right rear finisher light
Right seat heater
Right seat heater switch
Right vanity mirror illumi- nation light
Room light
Seat belt switch
Security control module
Sedan
Slide switch
Spot light
Trunk room light switch
Vdc off switch
Vehicle interface
Wagon
Wiper deicer switch
Working light switch

HEADLIGHTS

Headlights Wiring Diagram for Subaru Legacy L 2003

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List of elements for Headlights Wiring Diagram for Subaru Legacy L 2003:

2 light model
2.5l 3.0l
3.0l 2.5l
4 light model
Acc
B152
B242
B71
B96
Combination meter
Combination switch
Daytime running light control module (behind center of dash)
Daytime running light relay (4 light model) (in relay block)
Dimmer & passing switch
Diode (behind right side of dash)
F37
F39
Front foglight relay (in a/c relay holder)
Front foglight switch
Fuse & relay box
Fuse 11 15a
Fuse 7 15a
Fuse 8 15a
Fuse 9 15a
Gb-2 (at left front of engine compt)
Gb-3 (at rear of engine compt)
Head
Hi beam ind
High
Hot at all times
Hot in on or start
I11
Ignition switch
Instrument cluster system
Interior lights system
Left front fog- light
Left headlight
Left headlight relay
Lighting switch
Low
Main fuse box (at left side of engine compt, at rear of battery)
Navigation system
Off
Op connector (behind left center of dash)
Park
Parking brake switch (at base of parking brake lever)
Pass
Pnk
Red
Red/
Right front fog- light
Right headlight
Right headlight relay
Start
Starting/ charging system
W/ onstar
W/o onstar

HORN

Horn Wiring Diagram for Subaru Legacy L 2003

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List of elements for Horn Wiring Diagram for Subaru Legacy L 2003:

F37
F39
Fuse 6 15a
Horn
Horn relay
Horn switch
Hot at all times
Main fuse box (at left side of engine compt, at rear of battery)

INSTRUMENT CLUSTER

Instrument Cluster Wiring Diagram (1 of 2) for Subaru Legacy L 2003

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List of elements for Instrument Cluster Wiring Diagram (1 of 2) for Subaru Legacy L 2003:

(2.5l)
(w/o sport shift model)
+5v
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
Abs warning ind
Air bag warning ind
Anti-lock brakes system
Anti-theft system
B10
B11
B12
B13
B14
B15
B152
B16
Brake fluid park brake/
Buzzer
C10
C11
C12
C13
C14
C7 a5
Charge warning ind
Circuit
Circuit air bag
Clock/ out temp
Clock/ out temp back light
Combination meter
Cpu
Cruise control system
Dimmer
Door warning back light
Door warning sports shift (lcd)
Engine controls system
Exterior lights system
F40
Fuel gauge
Fuse & relay box
Fuse 12 10a
Fwd ind
Headlights system
Hi beam ind
Hot w/ tail & illumination relay energized
I/f
I10
I11
I12
Illum lamps (4)
Illumination circuit
Interior lights system
Left front door warn ind
Left rear door warn ind
Left turn ind
Level warning ind
Low fuel warning ind
Malfunction ind
Nca
Odo meter/ trip meter
Odo/ trip lcd back light
Pnk
Power circuit
Rear gate warn ind
Red
Right front door warn ind
Right rear door warn ind
Right turn ind
Seat belt ind
Security ind
Shift model w/ sports
Speedometer
Sport shift back light
Starting/charging system
Tachometer
Temperature gauge
Transmissions system
Vdc off ind
Vdc operation ind
Vdc warning ind
Vehicle outline
W/ sports shift model
W/o sports shift model
Warning ind a/t oil temp
Warning ind oil pressure
Warning system

Instrument Cluster Wiring Diagram (2 of 2) for Subaru Legacy L 2003

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List of elements for Instrument Cluster Wiring Diagram (2 of 2) for Subaru Legacy L 2003:

(2.5l: at rear of engine compt) gb-3
2.5l
3.0l
Ambient sensor (at left front of vehicle)
B134
B135
B136
B137
Brake fluid level switch (in brake master cylinder)
Connector (behind left center of dash)
Engine control module (behind right side of dash)
Engine coolant temperature sensor & thermometer (3.0l: on left front of engine, 2.5l: at top front of engine, on water pipe)
F68
Fuel level sensor
Fuel sub level sensor
Fuse 2 15a
Fuse 5 15a
Gb-3 (2.5l: at rear of engine compartment)
Gb-7 (at front left side of center console)
Ge (on right rear of engine)
Hot at all times
Hot in on or start
Ignition relay (in relay block)
Main fuse box (at left side of engine compt, at rear of battery)
Oil pressure switch (2.5l: on top front of right cylinder head, 3.ol: on right front of engine)
Parking brake switch (at base of parking brake lever)
Pnk
Shield & sensor ground joint connector

INTERIOR LIGHTS

Courtesy Lamps Wiring Diagram for Subaru Legacy L 2003

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List of elements for Courtesy Lamps Wiring Diagram for Subaru Legacy L 2003:

(at top center of trunk) gb-9
(under right front seat) gb-8
B52
Combination meter
D37
D38
Diode (door warning)
Diode (wagon)
Door
Door warning back light
Door warning sports shifts (lcd)
F40
F68
Fuse & relay box (behind left side of dash)
Fuse 2 15a
Fuse 4 20a
Gb-5 (under front of center console)
Gb-9 (at right rear quarterpanel)
Hot at all times
Hot in acc or on
I/f
I10
I12
Integrated module (behind left side of dash)
Key switch light
Keyless entry control module (behind right side of dash)
Left front door switch
Left rear door switch
Left step light
Left vanity mirror illumi- nation light
Luggage room light (wagon)
Main fuse box (at left side of engine compartment, at rear of battery)
Micro computer
Off
Op connector (behind left center of dash)
R51
R54
Rear gate latch switch (wagon)
Red
Right front door switch
Right rear door switch
Right step light
Right vanity mirror illumi- nation light
Room light
Spot light
Trunk room light (sedan)
Trunk room light switch (sedan)

Instrument Illumination Wiring Diagram for Subaru Legacy L 2003

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List of elements for Instrument Illumination Wiring Diagram for Subaru Legacy L 2003:

(w/ onstar)
(w/o onstar)
2.5l
3.0l
A/t select lever illumination light
Ashtray illumination light
Auto a/c control module illumination
B134
B137
B152
B280
B281
B51
B71
Center of dash)
Combination meter
Combination switch
Cruise control main switch illumination light
Engine control module (behind right side of dash)
F40
F68
Front fog- light switch illumination light
Fuse & relay box
Fuse 12 10a
Fuse 7 20a
Gb-3 (at rear of engine compt)
Gb-7 (at front left side of center console)
Glove box illumi- nation light
Hazard switch illumination light
Head
Hot at all times
Hot in on or start
I10
I49
Illumination light
Integrated module (behind left side of dash)
Left seat heater switch illumination light
Light switch
Main fuse box (at left side of engine compartment, at rear of battery)
Mode control panel illumination light
Off
Op connector (behind left
Park
Power window main switch illumination light
Radio illumination light
Right seat heater switch illumination light
Tail & illumination relay
Vdc off switch
Wiper deicer switch illumination light

POWER DISTRIBUTION

Power Distribution Wiring Diagram (1 of 4) for Subaru Legacy L 2003

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List of elements for Power Distribution Wiring Diagram (1 of 4) for Subaru Legacy L 2003:

(2.5l)
(2.5l: at rear of engine compt) gb-3
(3.0l)
(at left side of engine compartment, at rear of battery) main fuse box
(not used)
Abs
Abs control module
Auto a/c control module
B135
B137
B152
B158
B281
B51
B52
B55
Battery
Blower motor relay
Check connector
Combination meter
Data link connector
Engine control module
F36
F37
F39
F40
F41
F68
Front foglight relay
Fuel pump relay
Fuse & relay box
Fuse 1 15a
Fuse 1 20a
Fuse 13 15a
Fuse 2 15a
Fuse 3 10a
Fuse 3 15a
Fuse 4 10a
Fuse 5 15a
Fuse 6 15a
Fuse 7 15a
Fuse 7 20a
Fuse 8 15a
Fuse 8 30a
Fuse 9 15a
Generator
Hazard switch
Headlights system
Horn relay
I12
I49
Ignition relay
Integrated module
Key switch light
Key warning switch
Keyless buzzer
Keyless entry control module
Left headlight relay
Luggage room light (wagon)
Main relay
Nca
Option connector
Parking switch
Power seat
Power window circuit breaker
Power window relay
Radio
Rear defogger relay
Red
Relay box
Right headlight relay
Room light
Sbf-1 fuse 100a
Sbf-3 fuse 50a
Sbf-5 fuse 30a
Sbf-6 fuse 30a
Security control module
Security horn relay
Spot light
Starter motor
To ignition switch (diagram 2 of 4)
To main fuse box sbf-4 (diagram 2 of 4)
To multiple power socket fuse holder (diagram 4 of 4)
To tail & illumination relay (diagram 3 of 4)
Transmission control module
Trunk room light (sedan)
Valve relay
Vdc
Vehicle speed sensor (m/t)
W/ on star
W/o on star

Power Distribution Wiring Diagram (2 of 4) for Subaru Legacy L 2003

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List of elements for Power Distribution Wiring Diagram (2 of 4) for Subaru Legacy L 2003:

(2.5l) (3.0l)
(not used)
A/t
Acc
B136 b134
B158
Combination switch
Cruise control module (a/t)
Engine control module
F35
F36
F38
F40
From fuse & relay box (diagram 4 of 4)
From ignition relay (diagram 1 of 4)
From main fuse box headlight relays (diagram 1 of 4)
From main fuse box sbf-1 (diagram 1 of 4)
Front washer motor
Front wiper motor
Front wiper switch
Fuse & relay box
Fuse 14 10a
Fuse 15 30a
Fuse 20a
Fuse 9 15a
Gb-3 (2.5l: at rear of engine compt)
Gb-9 (sedan: at top center of trunk) (wagon: at right rear quarterpanel)
Generator
Ignition switch
Inhibitor switch
Interrupt relay
M/t
Main fuse box (at left side of engine compt, at rear of battery)
Nca
Off
Radio
Rear washer motor
Rear wiper intermittent module
Rear wiper motor
Relay block (behind left side of dash)
Sbf-2 fuse 50a
Sbf-4 fuse 50a
Short connector
Start
Starter interlock relay
To air conditioning fuse holder (diagram 4 of 4)
To fuse & relay box (diagram 4 of 4)
To fuse & relay box fuse 18 (diagram 3 of 4)
To fuse & relay box fuse 4 (diagram 4 of 4)
To sbf fuse holder (diagram 4 of 4)
W/ security
W/ security control module connector model
W/o security
W/o security control module connector model

Power Distribution Wiring Diagram (3 of 4) for Subaru Legacy L 2003

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List of elements for Power Distribution Wiring Diagram (3 of 4) for Subaru Legacy L 2003:

(2.5l)
(3.0l)
(3.0l) (2.5l)
(not used)
(w/ on star) (w/o on star)
2.5l
3.0l
A/t select lever illumination light
Ab6
Abs control module
Air conditioning relay
Air conditioning relay holder
Airbag control module
Ashtray illumination light
Auto a/c control module
Auto a/c control module (a/t)
Automatic a/c
B134
B136
B152
B158
B242
B280
B51
B52
B54
B96
Back-up light switch (m/t)
Blower motor relay
Combination meter
Cruise control main switch
Cruise control main switch illumination light
Cruise control module
Daytime running light control module
Daytime running light relay (4 light model)
Engine control module
Exterior lights system
F28 f28
F29
F30
F41
F66
From fuse & relay box f40 pin 9 (diagram 1 of 4)
From ignition switch (diagram 2 of 4)
Front fog light switch illumination light
Fuel pump relay
Fuse & relay box
Fuse 11 15a
Fuse 12 10a
Fuse 17 15a
Fuse 18 15a
Fuse 6 15a
Glove box illumination light
Hazard switch illumination light
I10
I17
I48
I49
Ignition coil & ignitor
Ignition coil 1
Ignition coil 2
Ignition coil 3
Ignition coil 4
Ignition coil 5
Ignition coil 6
Inhibitor switch (a/t)
Integrated module
Left seat heater switch illumination light
Main fan relay (2.5l)
Main fan relay 1 (3.0l)
Main fan relay 2 (3.0l)
Manual a/c
Mode control panel (m/t)
Mode control panel illumination light
Nca
Option connector
Parking switch
Power window main switch illumination light
Power window relay
Pressure switch
Radio illumination light
Rear defogger relay
Red
Right seat heater switch illumination light
Sub fan relay (2.5l)
Sub fan relay 1 (3.0l)
Sub fan relay 2 (3.0l)
Tail & illumination relay
Transmission control module
Vdc off switch
Vehicle dynamic control module
Wiper deicer relay
Wiper deicer switch illumination light

Power Distribution Wiring Diagram (4 of 4) for Subaru Legacy L 2003

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List of elements for Power Distribution Wiring Diagram (4 of 4) for Subaru Legacy L 2003:

(at left side of engine compt)
(not used)
(w/ cruise control module)
(w/ vdc) (w/ abs)
(w/o cruise control module)
2.5l
20a
3.0l
30a
Abs
Abs control module
Air conditioning relay holder
Auto a/c control module
B158
B225
B280
B52
B55
F27
F28
F29
F40
F66
From battery (diagram 1 of 4)
From fuse & relay box (diagram 2 of 4)
From main fuse box (diagram 2 of 4)
From main fuse box sbf-2 (diagram 2 of 4)
Fuse & relay box
Fuse 10 15a
Fuse 16 20a
Fuse 19 20a
Fuse 25a
Fuse 30a
Fuse 4 20a
Fuse 50a 30a
Gb-7 (at front left side of center console)
Integrated module
Left rearview mirror (heater)
Left vanity mirror illumination light
Main fan relay
Main fan relay 1
Motor relay
Multiple power socket
Multiple power socket fuse holder
Multiple power socket relay
Nca
Op2
Op3
Op4
Op5
Option connector
Power amplifier
Red
Relay block (behind left side of dash)
Relay box
Remote controlled rearview mirror switch
Right rearview mirror (heater)
Right vanity mirror illumination light
Sbf holder
Stoplight switch
Sub fan relay
Sub fan relay 1
Sub fan relay 2
Trailer connector
Vdc
Wiper deicer relay

POWER DOOR LOCKS

Power Door Locks Wiring Diagram, without Keyless Entry for Subaru Legacy L 2003

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List of elements for Power Door Locks Wiring Diagram, without Keyless Entry for Subaru Legacy L 2003:

B152
B280
B281
Driver's side door lock switch
Driver's side front door lock actuator
Fuse & relay box
Fuse 3 15a
Gb-5 (under front of center console)
Gb-7 (at front left side of center console)
Hot at all times
Integrated module (behind left side of dash)
Left rear door lock actuator
Passenger's side door lock actuator
Passenger's side door lock switch
Rear gate lock actuator (wagon)
Right rear door lock actuator

POWER MIRRORS

Power Mirrors Wiring Diagram for Subaru Legacy L 2003

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List of elements for Power Mirrors Wiring Diagram for Subaru Legacy L 2003:

B52
Change over switch
Defogger system
Fuse & relay box
Fuse 4 20a
Gb-3 (at rear of engine compt)
Hot in acc or on
Left rearview mirror
Left/ right m
Mirror heater
Mirror heater switch
Motor
Nca
Off
Remote control mirror switch
Right rearview mirror
Up/ down m

POWER SEATS

Heated Seats Wiring Diagram for Subaru Legacy L 2003

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List of elements for Heated Seats Wiring Diagram for Subaru Legacy L 2003:

B52
F36
Fuse & relay box
Fuse 20a
Fuse 4 20a
Gb-3 (at rear of engine compartment)
Gb-9 (sedan) (at top center of trunk)
Gb-9 (wagon) (at right rear quarterpanel)
High
Hot at all times main fuse box (at left side of engine compt, at rear of battery)
Hot in acc or on
Interior lights system
Left seat heater
Left seat heater switch
Low
Off
Red
Relay block (behind left side of dash)
Right seat heater
Right seat heater switch
Sbf-2 fuse 50a

Power Seat Wiring Diagram for Subaru Legacy L 2003

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List of elements for Power Seat Wiring Diagram for Subaru Legacy L 2003:

F36
Front tilt limit switch
Front tilt motor
Front tilt switch
Gb-9 (wagon) (at right rear quarterpanel)
Gb-9 gb-9 (sedan) (at top center of trunk)
Hot at all times
Main fuse box (at left side of engine compartment, at rear of battery)
Power seat
Power window circuit breaker (behind left side of dash)
Rear tilt limit switch
Rear tilt motor
Rear tilt switch
Reclining motor
Reclining switch
Sbf-6 fuse 30a
Slide motor
Slide switch

POWER TOP/SUNROOF

Sunroof Wiring Diagram, Sedan for Subaru Legacy L 2003

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List of elements for Sunroof Wiring Diagram, Sedan for Subaru Legacy L 2003:

B52
Close
F36
Fuse & relay box
Fuse 15a
Gb-3 (at rear of engine compt)
Hot at all times
Hot in on or start
Main fuse box (at left side of engine compt, at rear of battery)
Nca
Open
Power window circuit breaker (behind left side of dash)
Power window relay (in relay block)
Red
Sbf-6 fuse 30a
Sun roof control module & motor (at rear of sun roof opening)
Sun roof switch
Tilt down
Tilt up

Sunroof Wiring Diagram, Wagon for Subaru Legacy L 2003

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List of elements for Sunroof Wiring Diagram, Wagon for Subaru Legacy L 2003:

B52
Close
F36
Fuse & relay box
Fuse 15a
Gb-3 (at rear of engine compt)
Hot at all times
Hot in on or start
Main fuse box (at left side of engine comp, at rear of battery)
Nca
Open
Power window circuit breaker (behind left side of dash)
Power window relay (in relay block)
Red
Sbf-6 fuse 30a
Sun roof control module & motor (at rear of sun roof opening)
Sun roof switch

POWER WINDOWS

Power Windows Wiring Diagram for Subaru Legacy L 2003

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List of elements for Power Windows Wiring Diagram for Subaru Legacy L 2003:

Auto down
Auto up
Auto up/down circuit
B52
Down
Fuse & relay box
Fuse 18 15a
Gb-3 (at rear of engine compt)
Hot at all times
Hot in on or start
Interior lights system
Left front
Left front power window motor
Left rear
Left rear power window motor
Left rear power window sub switch
Power tops system
Power window circuit breaker (behind left side of dash)
Power window main switch
Power window relay (in relay block)
Right front
Right front power window motor
Right front power window sub switch
Right rear
Right rear power window motor
Right rear power window sub switch

RADIO

Radio Wiring Diagram, with Macintosh Audio System for Subaru Legacy L 2003

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List of elements for Radio Wiring Diagram, with Macintosh Audio System for Subaru Legacy L 2003:

(not used)
20a
Antenna
B225
Din cord
F34
F68
Fuse & relay box
Fuse 2 15a
Fuse 9 15a
Gb-9 (wagon: at right rear quarterpanel) (sedan: at top center of trunk)
Gr (under right front of center console)
Hot at all times
Hot in acc or on
Interior lights system
Left front door speaker
Left front door tweeter
Left rear door speaker
Main fuse box (at left side of engine compartment, at rear of battery)
Nca
Pnk
Power amplifier (behind center of dash)
Radio
Radio amplifier
Relay block (behind left side of dash)
Right front door speaker
Right front door tweeter
Right rear door speaker
Sbf holder (at left side of engine compt)
Sbf-8 fuse 30a
Sub woofer
Twisted wire

Radio Wiring Diagram, without Macintosh Audio System for Subaru Legacy L 2003

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List of elements for Radio Wiring Diagram, without Macintosh Audio System for Subaru Legacy L 2003:

Antenna
F68
Fuse & relay box
Fuse 2 15a
Fuse 9 15a
Gr (under right front of center console)
Hot at all times
Hot in acc or on
I64
Interior lights system
Left front door speaker
Left front door tweeter
Left rear door speaker
Left rear tweeter
Left speaker joint connector
Main fuse box (at left side of engine compartment, at rear of battery)
Nca
Radio
Radio amplifier
Right front door speaker
Right front door tweeter
Right rear door speaker
Right rear tweeter
Right speaker joint connector
Sub woofer (w/ premium radio)
Twisted wire
W/ rear tweeter speaker
W/o rear tweeter speaker

SHIFT INTERLOCK

Shift Interlock Wiring Diagram for Subaru Legacy L 2003

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List of elements for Shift Interlock Wiring Diagram for Subaru Legacy L 2003:

"p" position switch
B152
B158
B280
B281
B52
F37
F40
F68
Fuse & relay box
Fuse 11 15a
Fuse 16 20a
Fuse 2 15a
Fuse 4 20a
Fuse 6 15a
Gb-3 (at rear of engine compt)
Hot at all times
Hot in acc or on
Hot in on or start
Inhibitor switch (3.0l: on right side of transmission case)
Integrated module (behind left side of dash)
Key lock solenoid (on ignition key cylinder)
Key warning switch
Main fuse box (at left side of engine compt, at rear of battery)
Red
Shift lock solenoid
Stop & brake switch (on brake pedal bracket)
Stoplight switch (on brake pedal bracket)
W/ cruise control
W/o cruise control

STARTING/CHARGING

Charging Wiring Diagram for Subaru Legacy L 2003

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List of elements for Charging Wiring Diagram for Subaru Legacy L 2003:

(in relay block)
3.0l
B137
B152
Battery
Charge indicator
Combination meter
Engine control module (behind right side of dash)
Exterior lights system
F35
F39
F68
Fuse & relay box
Fuse 3 10a
Fuse 5 15a
Generator
I12
Ignition relay
Main fuse box (at left side of engine compt, at rear of battery)
Nca
Option connector
Sbf-1 fuse 100a
Starter motor

Starting Wiring Diagram for Subaru Legacy L 2003

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List of elements for Starting Wiring Diagram for Subaru Legacy L 2003:

(2.5l)
(3.0l)
(behind left side of dash)
A/t
Acc
B134
B136
Battery
Clutch switch (on clutch pedal bracket)
Connector model
Control module
Daytime running light control module (behind center of dash)
Engine control module (behind right side of dash)
F38
Gb-3 (at rear of engine compt)
Ignition switch
Inhibitor switch (on right side of transmission case)
Interrupt relay
M/t
Main fuse box (at left side of engine compt, at rear of battery)
Nca
Off
Sbf-1 fuse 100a
Sbf-4 fuse 50a
Short connector
Start
Starter interlock relay (behind left side of dash, near power window circuit breaker)
Starter motor
W/ anti-theft
W/o anti-theft, w/ security
W/o anti-theft, w/o security