Subaru Legacy (2005 year). Manual - part 1053

WI-5

WIRING SYSTEM

Basic Diagnostic Procedure

• The number of poles or pins, presence of a lock are indicated in the sketch of each connector. In the
sketch, the highest pole number refers to the number of poles which the connector has. For example, the
sketch of the connector shown in figure indicates the connector has 9 poles.

• When one set of connectors is viewed from the
front side, the pole numbers of one connector are
symmetrical to those of the other. When these two
connectors are connected as a unit, the poles
which have the same number are joined.

• WIRING DIAGRAM:
The connectors are numbered along with the num-
ber of poles, external colors, and mating connec-
tions in the accompanying list.
• The sketch of each connector in the wiring dia-
gram usually shows the (A) side of the connector.
The relationship between the wire color, terminal
number and connector is described in the figure.

NOTE:
A wire which runs in one direction from a connector
terminal sometimes may have a different color from
that which runs in the other direction from that ter-
minal.

WI-02747

Connector used in  vehicle

Sketch

Symbol

Number of poles

Numbered in order from upper
right to lower left.

Numbered in order from upper
left to lower right

Connector shown in wiring diagram

Double frames

Indicates a lock 
is included.

Indicates the number of poles.

4

3

2

1

9

8

7

6

5

Indicates a lock is included.

Single frame

1

2

3

4

5

6

7

8

9

WI-00107

1

1

2

2

3

3

4

4

5

5

6

6

WI-02748

Wire color :

BR (No. 1 terminal)
RW (No. 3 terminal)

i2

3 4

1 2

BR

RW

i2

F4

1
3

(A)

WI-6

WIRING SYSTEM

Basic Diagnostic Procedure

• In the wiring diagram, connectors which have no
terminal number refer to one-pole types. Sketches
of these connectors are omitted intentionally.

• The following color codes are used to indicate
the colors of the wires.

• The wire color code, which consists of two letters
(or three letters including Br or Lg), indicates the
standard color (base color of the wire covering) by
its first letter and the stripe marking by its second
letter.

• The table lists the nominal sectional areas and
allowable currents of the wires.

CAUTION:
When replacing or repairing a wire, be sure to 
use the same size and type of the wire which 
was originally used.

NOTE:
• The allowable current in the table indicates the
tolerable amperage of each wire at an ambient
temperature of 40

°C (104°F).

• The allowable current changes with ambient
temperature. Also, it changes if a bundle of more
than two wires is used.

Color code

Color

L

Blue

B

Black

Y

Yellow

G

Green

R

Red

W

White

Br

Brown

Lg

Light green

Gr

Gray

P

Pink

Or

Orange

Sb

Light blue

V

Purple

SA

Sealed (Inner)

SB

Sealed (Outer)

WI-00109

B

B

B15

F10

WI-00110

YL

2

YG

1

SB

10

YL

9

YG

8

SA

1

SB

22

SA

20

YG

YL

SB

SB

SA

Nominal sec-
tional area

No. of 
strands/
strand diam-
eter

Outside 
diameter of 
wiring

Allowable 
current
Amps/
40

°C (104°F)

mm

2

mm

0.3

7/0.26

1.8

7

0.5

7/0.32

2.2 (or 2.0)

12

0.75

30/0.18

2.6 (or 2.4)

16

0.85

11/0.32

2.4 (or 2.2)

16

1.25

16/0.32

2.7 (or 2.5)

21

2

26/0.32

3.1 (or 2.9)

28

3

41/0.32

3.8 (or 3.6)

38

5

65/0.32

4.6 (or 4.4)

51

8

50/0.45

5.5

67

WI-03797

Y B

Black

Marking color :
Reference color :

Yellow

WI-7

WIRING SYSTEM

Basic Diagnostic Procedure

• Each unit is either directly grounded to the body
or indirectly grounds through a harness ground ter-
minal. Different symbols are used in the wiring dia-
gram to identify the two grounding systems.

• The ground points shown in the wiring diagram
refer to the following:

NOTE:
All wiring harnesses are provided with a ground
point which should be securely connected.

WI-02750

Direct ground

Indirect terminal
ground

B

WI-03791

: ABS GROUND

GA

: AIRBAG GROUND

GAB

: BODY GROUND

GB

: ENGINE GROUND

GE

: RADIO GROUND

GR

: VDC GROUND

GV

: REAR DEFOGGER GROUND

GD

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WI-8

WIRING SYSTEM

Basic Diagnostic Procedure

• Relays are classified as normally-open or normally-closed.
The normally-closed relay has one or more contacts. The wiring diagram shows the relay mode when the en-
ergizing circuit is OFF.

Relay type

4-pole

6-pole

4-pole

6-pole

Normally-open type

Normally-closed type

Mixed type

Key to symbols:

:  Current flows.

:  Current does not flow.

Energizing circuit OFF

Energizing circuit ON

WI-02752