Lexus GS300/400 (2000 year). Manual - part 89

BE0H7–04

I04062

1

2

3

4

Pushed in

Free

I04063

Wire Harness Side

I04064

w/ Rear spoiler type

w/o Rear spoiler

BE–70

–

BODY ELECTRICAL

STOP LIGHT SYSTEM

2371

INSPECTION

1.

INSPECT STOP LIGHT SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

Switch pin free

(Pedal depressed)

–

No continuity

Switch pin pushed in

(Pedal released)

1 – 2

Continuity

Switch pin free

(Pedal depressed)

–

No continuity

Switch pin pushed in

(Pedal released)

3 – 4

Continuity

If continuity is not as specified, replace the switch.

2.

INSPECT STOP LIGHT SWITCH CIRCUIT
(See page 

DI–839

)

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

Battery positive voltage

If circuit is not as specified, inspect the power source or wire
harness.

3.

INSPECT HI–MOUNTED STOP LIGHT CONTINUITY

Using an ohmmeter, check that continuity exists between termi-
nals.
If continuity is not as specified, replace the light assembly or
bulb.

I04053

Wire Harness Side

–

BODY ELECTRICAL

STOP LIGHT SYSTEM

BE–71

2372

4.

INSPECT HI–MOUNTED STOP LIGHT CIRCUIT

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

Tester connection

Condition

Specified condition

2 – Ground

Constant

Continuity

If circuit is not as specified, inspect the power source or wire
harness.

5.

INSPECT LIGHT FAILURE SENSOR
(See page 

DI–841

 and 

BE–92

)

BE023–07

I01357

Headlight Cleaner Relay

Washer Tank

 Headlight Cleaner Motor

Headlight Cleaner Switch

Headlight Cleaner Nozzle

Engine Room No.1
Junction Block

 H–LP CLN H–Fuse

Ignition Switch

Driver Side Junction Block 

 WASHER Fuse

BE–72

–

BODY ELECTRICAL

HEADLIGHT CLEANER SYSTEM

2373

HEADLIGHT CLEANER SYSTEM

LOCATION



The vehicle shown in this illustration is ”GS400”.



All components of ”GS300” other than the ones used for engine are same as ”GS400”.

BE0HM–03

I04065

I01290

1

2

3 4 5

6

Wire Harness Side

e–6–1

I01687

1

2

3

4

5

–

BODY ELECTRICAL

HEADLIGHT CLEANER SYSTEM

BE–73

2374

INSPECTION

1.

INSPECT HEADLIGHT CLEANER SWITCH CONTINU-
ITY

Switch position

Tester connection

Specified  condition

OFF

–

No continuity

ON

2 – 4

Continuity

Illumination circuit

5 – 6

Continuity

If continuity is not as specified, replace the switch.

2.

INSPECT HEADLIGHT CLEANER SWITCH CIRCUIT

Disconnect the switch connector and inspect the connector on
wire harness side, as shown.

Tester connection

Condition

Specified condition

1 – Ground

Headlight ON

Continuity

1 – Ground

Headlight OFF

No continuity

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

3.

INSPECT HEADLIGHT CLEANER RELAY OPERATION

(a)

Check that no continuity exists between terminals 2 and
5.

(b)

Connect the positive (+) lead from the battery to terminals
1 and 5, and the negative (–) lead to terminal 3.

(c)

Connect the negative (–) lead from the battery to terminal
4, and check that continuity exists between terminals 2
and 5 for 0.9 – 1.1 seconds, then no continuity exists.

If operation is not as specified, replace the motor.