Lexus GS300/400 (2000 year). Service manual - part 86

I04046

Wire Harness Side

BE–58

–

BODY ELECTRICAL

TURN SIGNAL AND HAZARD WARNING SYSTEM

2359

6.

INSPECT TURN SIGNAL FLASHER CIRCUIT

Disconnect the connector from the combination switch and in-
spect the connector on the wire harness side, as shown.

Tester connection

Condition

Specified condition

2 – Ground

Constant

Continuity

3 – Ground

Constant

Continuity

5 – Ground

Turn signal switch RIGHT or OFF

No continuity

5 – Ground

Turn signal switch LEFT

Continuity

6 – Ground

Turn signal switch LEFT or OFF

No continuity

6 – Ground

Turn signal switch RIGHT

Continuity

7 – Ground

Constant

Continuity

8 – Ground

Hazard warning switch OFF

No continuity

8 – Ground

Hazard warning switch ON

Continuity

1 – Ground

Ignition switch LOCK or ACC

No voltage

1 – Ground

Ignition switch ON

Battery positive voltage

4 – Ground

Constant

Battery positive voltage

If circuit is as specified, replace the relay.
If circuit is not as specified, inspect the circuits connected to oth-
er parts.

BE0GY–05

I01354

Front Personal Light

Rear Personal Light

Door Courtesy Light

Licence Plate Light

Luggage Compartment Light

Door Courtesy Lights

Luggage Compartment
Courtesy Switch

Door Courtesy Light

Vanity Light

Vanity Light

Rheostat Light Control

Glove Compartment
Door Courtesy Light

Glove Compartment
Door Courtesy Switch

Passenger Side Junction Block

 DOME Fuse

 Body ECU No.1

Driver Side Junction Block

 Body ECU No.2

Luggage
Compartment
Key Lock and
Unlock Switch

Rear Personal Light

Rear Personal Light

–

BODY ELECTRICAL

INTERIOR LIGHT SYSTEM

BE–59

2360

INTERIOR LIGHT SYSTEM

LOCATION

I04047

DOOR

OFF

ON

DOOR

OFF

ON

w/ Sliding Roof

w/o Sliding Roof

BE0GZ–03

I04048

Wire Harness Side

BE–60

–

BODY ELECTRICAL

INTERIOR LIGHT SYSTEM

2361

INSPECTION

1.

INSPECT FRONT PERSONAL LIGHT SWITCH CONTI-
NUITY

Switch position

Tester connection

Specified condition

Interior light switch

OFF (Lever switch)

–

No continuity

Interior light switch

DOOR (Lever switch)

1 – 3

Continuity

Interior light switch

ON (Lever switch)

1 – 2

Continuity

*Personal light OFF

(Push switch)

–

No continuity

*Personal light ON

(Push switch)

1 – 2

Continuity

*: Set the interior light switch to OFF or DOOR.
If continuity is not as specified, replace the light assembly or
bulb.

2.

INSPECT FRONT PERSONAL LIGHT SWITCH CIR-
CUIT
(See page 

DI–843

)

Disconnect the connector from the switch and inspect the con-
nector on the wire harness side, as shown.

Tester connection

Condition

Specified condition

2 – Ground

Constant

Continuity

1 – Ground

Constant

Battery positive voltage

If circuit is not as specified, inspect power source or wire har-
ness.

I04049

I04048

Wire Harness Side

I04050

2 1

OFF

ON

–

BODY ELECTRICAL

INTERIOR LIGHT SYSTEM

BE–61

2362

3.

INSPECT REAR PERSONAL LIGHT SWITCH CONTI-
NUITY

Switch position

Tester connection

Specified condition

Room light switch

OFF and door closed

–

No continuity

Room light switch

ON and door closed

1 – 2

Continuity

Room light switch OFF or

ON and door opened

1 – 3

Continuity

If continuity is not as specified, replace the light assembly or
bulb.

4.

INSPECT REAR PERSONAL LIGHT SWITCH CIRCUIT

Disconnect the connector from the switch and inspect the con-
nector on the wire harness side, as shown.

Tester connection

Condition

Specified condition

2 – Ground

Constant

Continuity

1 – Ground

Constant

Battery positive voltage

If circuit is not as specified, inspect power source or wire har-
ness.

5.

INSPECT VANITY LIGHT CONTINUITY

Switch position

Tester connection

Specified condition

OFF (closed)

–

No continuity

ON (opened)

1 – 2

Continuity

If continuity is not as specified, replace the vanity light assembly
or bulb.