Lexus GS300/400 (2000 year). Service manual — part 85
I04035
From Back Side
11
I01200
2
1
3
5
2
5
1
3
BE–54
–
BODY ELECTRICAL
FOG LIGHT SYSTEM
2355
3.
INSPECT FOG LIGHT SWITCH CIRCUIT
Connector connected:
Connect the wire harness side connector to the light control and
dimmer switch and inspect the connector from the back side, as
shown.
Tester connection
Condition
Specified condition
11 – Ground
Light control switch HEAD and headlight dimmer
switch LO and fog light switch ON
No voltage
11 – Ground
Light control switch HEAD and headlight dimmer
switch HI or FLASH and fog light switch ON
Battery positive voltage
If circuit is not as specified, inspect the wire harness.
4.
INSPECT FOG LIGHT RELAY CONTINUITY
Condition
Tester connection
Specified condition
Constant
1 – 2
Continuity
Apply B+ between
terminals 1 and 2.
3 – 5
Continuity
If continuity is not as specified, replace the relay.
5.
INSPECT FOG LIGHT RELAY CIRCUIT
(See page
BE0H0–06
I01353
Turn Signal Lights
Engine Room No.1
Junction Block
TURN HAZ Fuse
Ignition Switch
Combination Switch
Turn Signal Switch
Hazard Warning Switch
Turn Signal Lights
Turn Signal Lights
Driver Side Junction Block
GAUGE Fuse
Cowl Side No.5
Junction Block
Turn Signal Flaher
–
BODY ELECTRICAL
TURN SIGNAL AND HAZARD WARNING SYSTEM
BE–55
2356
TURN SIGNAL AND HAZARD WARNING 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”.
BE0H1–02
I04043
Right turn
Left turn
I04034
Wire Harness Side
2
BE–56
–
BODY ELECTRICAL
TURN SIGNAL AND HAZARD WARNING SYSTEM
2357
INSPECTION
1.
INSPECT TURN SIGNAL SWITCH CONTINUITY
Switch position
Tester connection
Specified condition
Left turn
1 – 2
Continuity
Neutral
–
No continuity
Right turn
2 – 3
Continuity
If continuity is not as specified, replace the switch.
2.
INSPECT TURN SIGNAL SWITCH CIRCUIT
Connector disconnected:
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
If circuit is not as specified, inspect the wire harness.
I04035
From Back Side
1
2
3
I04044
I04045
Wire Harness Side
–
BODY ELECTRICAL
TURN SIGNAL AND HAZARD WARNING SYSTEM
BE–57
2358
3.
INSPECT TURN SIGNAL SWITCH CIRCUIT
Connector connected:
Connect the wire harness side connector to the combination
switch and inspect the connector form the back side, as shown.
Tester connection
Condition
Specified condition
2 – Ground
Ignition switch ON and turn signal switch Neutral
No voltage
1 – Ground
Ignition switch ON and turn signal switch Left
Battery positive voltage
↔
0 V
3 – Ground
Ignition switch ON and turn signal switch Right
Battery positive voltage
↔
0 V
If circuit is not as specified, inspect the circuits connected to oth-
er parts.
4.
INSPECT HAZARD WARNING SWITCH CONTINUITY
Switch position
Tester connection
Specified condition
Switch OFF
7 – 10
Continuity
Switch ON
7 – 8
Continuity
Illumination circuit
2 – 3
Continuity
If continuity is not as specified, replace the switch.
5.
INSPECT HAZARD WARNING SWITCH CIRCUIT
(See page
Disconnect the switch connector and inspect the connection on
the wire harness side, as shown.
Tester connection
Condition
Specified condition
8 – Ground
Constant
Continuity
If circuit is not as specified, inspect the circuits connected to oth-
er parts.
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