Subaru Legacy (2005 year). Manual - part 1054

WI-9

WIRING SYSTEM

Basic Diagnostic Procedure

• Each connector number shown in the wiring dia-
gram corresponds to that in the wiring harness. The
location of each connector in the actual vehicle is
determined by reading the first character of the
connector (for example, a “F” for F8, “i” for i16, etc.)
and the type of wiring harness. The first character
of each connector number corresponds to the area
or system of the vehicle.

Symbol

Wiring harness and cord

F

Front wiring harness

B

Bulkhead wiring harness

E

Engine wiring harness

T

Transmission cord

D

Door cord LH & RH, Rear gate cord
Rear door cord LH & RH, Rear defogger cord

i

Instrument panel wiring harness

R

Rear wiring harness,
Fuel tank cord,
Roof cord, Rear gate cord,
Rear defogger ground cord (Sedan model)

AB

Airbag wiring harness

F23

F98

F21

F58

F100

F5

F27

F47

F34

F19

F22

F96

WI-02753

Each connector number 
shown in wiring diagram 
corresponds to that in 
the vehicle.

F19

FRONT TURN  SIGNAL 
LIGHT LH (UPPER)

BG

2

B

1

F22

FRONT TURN  SIGNAL 
LIGHT LH (LOWER)

BG

3

B

2

(GRAY)

F3

(GRAY)

F19

1 2

WI-10

WIRING SYSTEM

Basic Diagnostic Procedure

D: SYMBOLS IN WIRING DIAGRAMS

A number of symbols are used in each wiring diagram to easily identify parts or circuits.

1. RELAY

A symbol used to indicate a relay.

2. CONNECTOR 1

The sketch of the connector indicates the one-pole
types.

3. WIRING CONNECTION

Some wiring diagrams are indicated in foldouts for
convenience. Wiring destinations are indicated
where necessary by corresponding symbols.
(When two pages are needed for clear indication)

4. FUSE No. & RATING

The “FUSE No. & RATING” corresponds with that
used in the fuse box (main fuse box, fuse and joint
box).

5. CONNECTOR 2

• Each connector is indicated by a symbol.
• Each terminal number is indicated in the corre-
sponding wiring diagram in an abbreviated form.
• For example, terminal number “G4” refers to No.
4 terminal of connector (G: F41) shown in the con-
nector sketch.

WI-04721

LR

LW

RL

3

7

2

5

MAIN FUSE BOX (M/B)

MB-11

MB-10

F39

P-SUP-02

B

P-SUP-02

A

P-SUP-02

C

No.3 10A

No.9 15A

No.8 15A

SBF-1 100A

HEAD-
LIGHT
RELAY
RH

HEAD-
LIGHT
RELAY
LH

G

P-SUP-04

D

H/L(2L)-01

RL

LW

GR

LB

TO POWER SUPPLY CIRCUIT

MB-10

M/B FUSE NO. 8

MB-11

M/B FUSE NO. 9

FB-16

F/B FUSE NO. 11

(IG)

MB-5

HEADLIGHT

RELAY

LW

4

R

3

YL

LW

R

YL

2

YB

1

RY

2

LW

2

R

1

YL

3

P

LW

B1

R

A1

F44

F45

F23

F7

B61

B62

B

RL

2

R

1

YL

3

B71

B112

LY

8

RY

7

YB

B

17

16

3

17

16

UP LOW PASS

HF

HU

HL

E

SMJ

LB

H1

B36

SMJ

DIODE

: WITHOUT REAR DEFOGGER

: WITH REAR DEFOGGER

PARKING
BRAKE
SWITCH

R4

OFF

HC

TC

EL

LOW

HIGH

HEADLIGHT RH

HEADLIGHT LH

LIGHTING SWITCH

DIMMER & PASSING
SWITCH

LOW

HIGH

B51

A:

B52

C:

F41

G:

(GRAY)

(BLACK)

(BLACK)

FB-37

D4

D7

BG

D11

A2

WR

G4

BL

G1

BR

D10

FB-35

FB-34

1

2 3

4 5 6 7

1 2

3

4 5 6 7 8

LgB

Or

FUSE &
RELAY
BOX
(F/B)

i5

B:

B51

A:

B152

D:

B52

C:

B158

E:

F41

G:

F40

F:

FB-36

A3

BG

G7

No.5 10A

P-SUP-03

H

P-SUP-03

F

P-SUP-04

K

P-SUP-04

J

No.1 20A

No.2 15A

SBF-6 30A

LR

2

R

3

L

1

R

3

BW

2

W

SBF-2 50A

SBF-3 50A

SBF-4 50A

F36

F38

F68

P-SUP-04

E

P-SUP-04

M

P-SUP-04

L

P-SUP-03

I

P-SUP-04

G

1 2 3 4
5 6 7 8

F44

B112

1 2

F23

1

2

3

F7

SPECIFICATION
CLASSIFICATION

SPECIFICATION
CLASSIFICATION

2

LY

13

13

WR

OR

OR

WR

REF. TO FOG (H4)-01

REF. TO ST (MT)-01

REF. TO ST (AT)-01

REF. TO FOG (H6)-01

REF. TO  GND-02

CONNECTOR-1

FUSE No. & RATING

CONNECTOR-2

CONNECTOR SKETCH

RELAY

WIRE TRACING
ON EXTENDED
WIRING DIAGRAMS

Example

DIODE

GROUND

POWER SUPPLY
CIRCUIT

SMJ

SYMBOLS OF
WIRE
CONNECTION
AND CROSSING

P

P

17

R3

B99

P

P

7

R1

B97

WG

WG

SD

SD

: WAGON

: SEDAN

SD

WG

HR

HARNESS
REPAIR KIT

WI-11

WIRING SYSTEM

Basic Diagnostic Procedure

6. CONNECTOR SKETCH

• Each connector sketch clearly identifies the
shape and color of a connector as well as terminal
locations. Non-colored connectors are indicated in
natural color.
• When more than two types of connector number
are indicated in a connector sketch, it means that
the same type connectors are used.

7. GROUND

Each grounding point can be located easily by re-
ferring to the corresponding wiring harness.

8. DIODE

A symbol is used to indicate a diode.

9. WIRE TRACING ON EXTENDED WIRING 
DIAGRAMS

For a wiring diagram extending over at least two
pages, a symbol (consisting of the same characters
with arrows), facilitates wire tracing from one page
to the next.
A 

←→ A, B ←→ B

10.SYMBOLS OF WIRE CONNECTION AND 
CROSSING

11.POWER SUPPLY CIRCUIT

A symbol is used to indicate the power supply in
each wiring diagram.
“MB-5”, “MB-6”, etc., which are used as power-
supply symbols throughout the text, correspond
with those shown in the “POWER SUPPLY CIR-
CUIT” in the wiring diagram.
Accordingly, using the “POWER SUPPLY CIR-
CUIT” and wiring diagrams permits service person-
nel to understand the entire electrical arrangement
of a system.

12.CLASSIFICATION BY SPECIFICATION

When the wiring diagram differ according to vehicle
specifications, the specification difference is de-
scribed by using abbreviations.

13.HARNESS REPAIR KIT

The connector adapting to Harness repair kit is
shown as “HR” in the right-upper of connector num-
ber.
Refer to “Harness Repair Kit” for harness repair kit.
<Ref. to WI-380, SPECIFICATION, Harness Re-
pair Kit.>

WI-02755

Symbol

Symbol

Refers to wires which are
crossed but not connected.

Refers to wires which are
connected and branched
at the dot point.

WI-12

WIRING SYSTEM

Basic Diagnostic Procedure

E: CONNECTOR SYMBOL IN WIRING HARNESS

A number of connector symbols are used in each wiring diagram to easily identify the wiring harness con-
nectors.

WI-02756

Standard type: Female

Standard type: Male

Water proof type: Female

Water proof type: Male

Pole: From 1 to 8

Pole: From 9 to 20

Pole: More than 21

Pole: From 1 to 8

Pole: From 9 to 20

Pole: More than 21