Subaru Legacy III (2000-2003 year). Manual - part 917

LI-2

LIGHTING SYSTEM

GENERAL DESCRIPTION

1. General Description

A: SPECIFICATIONS

B: PRECAUTIONS

• Before disassembling or reassembling parts, always disconnect battery ground cable. When replacing ra-
dio, control module, and other parts provided with memory functions, record memory contents before discon-
necting the battery ground cable. Otherwise, the memory will be erased.
• Reassemble in reverse order of disassembly, unless otherwise indicated.
• Adjust parts to the given specifications.
• Connect connectors and hoses securely during reassembly.
• After reassembly, make sure functional parts operate smoothly.

WARNING:
• Airbag system wiring harness is routed near electrical parts and switches. All airbag system wiring
harnesses and connectors are yellow. Do not use electric test equipment on these circuits.
• Be careful not to damage the airbag system wiring harness when servicing electrical parts and
switches.

C: PREPARATION TOOL

1. GENERAL TOOLS

Headlight

12 V — 55 W/55 W (Halogen)

Front turn signal light

12 V — 21 W

Side turn signal light

12 V — 5 W

Parking light

12 V — 5 W

Front fog light

12 V — 55 W

Rear fog light

12 V — 21 W

Rear combination light

Tail/Stop light

12 V — 5/21 W

Turn signal light

12 V — 21 W

Back-up light

12 V — 21 W

License plate light

12 V — 5 W

High-mounted stop light

Sedan

12 V — 21 W

Wagon

12 V — 10 W

Room light

12 V — 8 W

Spot  light

12 V — 8 W

Door step light

12 V — 3.4 W

Luggage room light

12 V — 13 W

Trunk room light

12 V — 5 W

Glove box light

12 V — 1.4 W

TOOL NAME

REMARKS

Circuit Tester

Used for measuring resistance and voltage.

LI-3

LIGHTING SYSTEM

HEADLIGHT AND TAIL LIGHT SYSTEM

2. Headlight and Tail Light Sys-

tem

A: SCHEMATIC

1. HEADLIGHT LHD MODEL

<Ref. to WI-264, LHD MODEL, SCHEMATIC,
Headlight System.>

2. HEADLIGHT RHD MODEL

<Ref. to WI-265, RHD MODEL, SCHEMATIC,
Headlight System.>

3. CLEARANCE LIGHT AND ILLUMINA-
TION LIGHT LHD MODEL

<Ref. to WI-248, LHD 4-CYLINDER ENGINE
MODEL, SCHEMATIC, Clearance Light and Illumi-
nation Light System.>
<Ref. to WI-251, LHD 6-CYLINDER ENGINE
MODEL, SCHEMATIC, Clearance Light and Illumi-
nation Light System.>

4. CLEARANCE LIGHT AND ILLUMINA-
TION LIGHT RHD MODEL

<Ref. to WI-254, RHD 4-CYLINDER NON-TURBO
ENGINE MODEL, SCHEMATIC, Clearance Light
and Illumination Light System.>
<Ref. to WI-257, RHD 6-CYLINDER ENGINE AND
TURBO ENGINE MODEL, SCHEMATIC, Clear-
ance Light and Illumination Light System.>

B: INSPECTION

1. HEADLIGHT RELAY

Measure headlight relay resistance between termi-
nals while connecting terminal No. 4 to battery pos-
itive terminal No. 3 to battery ground terminal.

2. TAIL AND ILLUMINATION RELAY

Measure tail and illumination relay resistance be-
tween terminals while connecting terminal No. 4 to
battery positive terminal No. 3 to battery ground ter-
minal.

Current

Terminal No.

Standard

Flow

1 and 2

Less than 1 

Ω

No flow

More than 1 M

Ω

Current

Terminal No.

Standard

Flow

1 and 2

Less than 1 

Ω

No flow

More than 1 M

Ω

LI-00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

LI-00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

LI-4

LIGHTING SYSTEM

FRONT FOG LIGHT SYSTEM

3. Front Fog Light System

A: SCHEMATIC

1. FRONT FOG LIGHT 4 CYLINDER EN-
GINE MODEL

<Ref. to WI-260, 4-CYLINDER ENGINE MODEL,
SCHEMATIC, Front Fog Light System.> 

2. FRONT FOG LIGHT LHD 6 CYLINDER 
ENGINE MODEL

<Ref. to WI-261, LHD 6-CYLINDER ENGINE
MODEL, SCHEMATIC, Front Fog Light System.> 

3. FRONT FOG LIGHT RHD 6 CYLINDER 
ENGINE MODEL

<Ref. to WI-262, RHD 6-CYLINDER ENGINE
MODEL, SCHEMATIC, Front Fog Light System.>

B: INSPECTION

1. FRONT FOG LIGHT SWITCH

Measure front fog light switch resistance.

2. FRONT FOG LIGHT RELAY

Measure front fog light relay resistance between
terminals while connecting terminal No. 4 to battery
positive terminal and terminal No. 3 to battery
ground terminal.

Switch position

Terminal No.

Standard

OFF

—

More than 1 M

Ω

ON

3 and 5

Less than 1 

Ω

LI-00051

1

2

3

6 5 4

Current

Terminal No.

Standard

Flow

1 and 2

Less than 1 

Ω

No flow

More than 1 M

Ω

LI-00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)

LI-5

LIGHTING SYSTEM

REAR FOG LIGHT SYSTEM

4. Rear Fog Light System

A: SCHEMATIC

1. REAR FOG LIGHT

<Ref. to WI-294, SCHEMATIC, Rear Fog Light
System.>

B: INSPECTION

1. REAR FOG LIGHT SWITCH

1) Turn ignition switch ON.
2) Turn on the headlight or front fog light.
3) Push the rear fog light switch and check if the
rear fog light turns on.

2. REAR FOG LIGHT RELAY

Measure rear fog light relay resistance between
terminals while connecting terminal No. 4 to battery
positive terminal and No. 3 to battery ground termi-
nal.

Current

Terminal No.

Standard

Flow

1 and 2

Less than 1 

Ω

No flow

More than 1 M

Ω

LI-00001

(1)

(2)

(1)

(4)

(2)

(3)

(3)

(4)