Lexus ES300 (1997 year). Service manual — part 244

BE054–01

N21576

Right

Left

3

2

1

N21563

Wire Harness Side

1

2 3 4 5

6

7 8

9 10 11

13

12

14 15 16 17

BE–40

–

BODY ELECTRICAL

TURN SIGNAL AND HAZARD WARNING SYSTEM

1424

1997 LEXUS ES300 (RM511U)

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 COMBINATION SWITCH CIRCUIT

Connect the wire harness side connector to the combination
switch and inspect wire harness side connector from the back
side.

Tester connection

Condition

Specified condition

1 – Ground

Constant

*Continuity

3 – Ground

Constant

*Continuity

2 – Ground

Ignition switch ON and turn signal switch position

Neutral

No voltage

2 – Ground

Hazard warning switch ON

Battery positive voltage

2 – Ground

Ignition switch ON and turn signal switch position

Left or Right

Battery positive voltage

*There is resistance because this circuit is grounded through
the bulb.
If the circuit is not as specified, inspect the circuit connected to
other parts.

BE1843

Turn Signal Light Bulbs(21W)

1

2

2

3

N21578

e–10–2

1

2

3

4

5

6

7

8

9

10

N21579

e–10–1

1 2

3 4

5 6 7 8 9 10

Wire Harness Side

–

BODY ELECTRICAL

TURN SIGNAL AND HAZARD WARNING SYSTEM

BE–41

1425

1997 LEXUS ES300 (RM511U)

3.

INSPECT TURN SIGNAL FLASHER OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
2 and the negative (–) lead to terminal 3.

(b)

Connect the 2 turn signal light bulbs in parallel to each
other to terminals 1 and 3, check that the bulbs flash.

HINT:
The turn signal lights should flash 60 to 120 times per minute.
If one of the front or rear turn signal lights has an open circuit,
the number of flashes will be more than 140 per minute.
If operation is not as specified, replace the flasher.
4.

INSPECT HAZARD WARNING SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

Switch OFF

5 – 7

Continuity

Switch ON

1 – 2 – 3 – 4

5 – 6

Continuity

Illumination circuit

8 – 9

Continuity

If continuity is not as specified, replace the switch.

5.

INSPECT HAZARD WARNING SWITCH CIRCUIT

Disconnect the switch connector and inspect the connection on
the wire harness side.

Tester connection

Condition

Specified condition

1 – Ground

Constant

*

2

Continuity

2 – Ground

Constant

*

2

Continuity

*

1

9 – Ground

Constant

Continuity

6 – Ground

Constant

Battery positive voltage

7 – Ground

Ignition switch position LOCK or ACC

No voltage

7 – Ground

Ignition switch position ON

Battery positive voltage

*

1

8 – Ground

Light control switch position OFF

No voltage

*

1

8 – Ground

Light control switch position TAIL or HEAD

Battery positive voltage

*

1

: Illumination

*

2

: There is resistance because this circuit is grounded through

the bulb.
If the circuit is not as specified, inspect the circuits connected
to other parts.

N21591

Rheostat Light
Control Volume

Glove Box
LIght Switch

BE055–01

BE–42

–

BODY ELECTRICAL

ILLUMINATION LIGHT SYSTEM

1426

1997 LEXUS ES300 (RM511U)

ILLUMINATION LIGHT SYSTEM

LOCATION

BE056–01

N21592

1

3

5

N21593

1

2

5

7

N21594

7 6

Z08889

OFF

ON

2

1

–

BODY ELECTRICAL

ILLUMINATION LIGHT SYSTEM

BE–43

1427

1997 LEXUS ES300 (RM511U)

INSPECTION

1.

Combination Meter Adjustment:
INSPECT RHEOSTAT LIGHT CONTROL VOLUME

(a)

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

(b)

Connect the positive (+) lead from the voltmeter to termi-
nal 5 and negative (–) lead to terminal 3.

(c)

Turn the rheostat knob and check that the voltage
changes.

2.

Illumination Adjustment:
INSPECT RHEOSTAT LIGHT CONTROL VOLUME

(a)

Connect the positive (+) lead from the battery to terminal
5 and 7 and negative (–) lead to terminal 1.

(b)

Connect the positive (+) lead from the voltmeter to termi-
nal 7 and negative (–) lead to terminal 2.

(c)

Turn the rheostat knob and check that the voltage
changes.

3.

Tail Cancel:
INSPECT RHEOSTAT LIGHT CONTROL VOLUME

(a)

Connect the ohmmeter to terminals 6 and 7.

(b)

Turn the rheostat knob fully clockwise and check that cur-
rent flow stops.

If switch is not as specified, replace the volume.

4.

INSPECT GLOVE BOX LIGHT SWITCH CONTINUITY

Switch position

Tester connection

Specified condition

OFF (Closed)

–

No continuity

ON (Opened)

1 – 2

Continuity

If continuity is not as specified, replace the relay.