1995 TOYOTA SUPRA Service Repair Manual

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Page 633 of 2543

TOYOTA SUPRA 1995 Service Repair Manual TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each

TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and
replace the part when it is found to be faulty.

Trouble

Parts name (See page)

Back Up Light does not light up

1. GAUGE Fuse (BE±6)
2. Ignition Switch (BE±8)
3. Back±up Light Switch (M/T) (BE±31)
4. Park/ Neutral Position Switch (A/T) (AT1±Section)
5. Wire Harness
6. Bulb
Back Up Light remains always on 1. Wire Harness

Only one light does not light up

1. Wire Harness
2. Bulb
BACK UP LIGHT SWITCH INSPECTION
INSPECT SWITCH CONTINUITY

Switch position

Tester connection to
terminal number

Specified condition
Free 1±2 No continuity
Push 1±2 Continuity
If continuity is not as specified, replace the switch.
PARK/NEUTRAL POSITION SWITCH
INSPECTION
See AT section
± BODY ELECTRICAL SYSTEMBACK±UP LIGHT SYSTEMBE±31

Page 634 of 2543

TOYOTA SUPRA 1995 Service Repair Manual STOP LIGHT SYSTEM
PARTS LOCATION
BE±32± BODY ELECTRICAL SYSTEMSTOP LIGHT SYSTEM

Page 635 of 2543

Page 636 of 2543

TOYOTA SUPRA 1995 Service Repair Manual WIPER AND WASHER SYSTEM
PARTS LOCATION
BE±34± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEM

Page 637 of 2543

TROUBLESHOOTING
The table below will be useful for you in troubleshooting these electrical problems. The most likely causes
of the malfunction are shown in the order of their probability. Inspect each part in the order shown, and
replace the part when it is found to be faulty.
Trouble Parts name (See page)

Wipers and washers do not operate.

1. ALT Fuse (BE±5)
2. AM1 Fuse (BE±5)
3. WIPER Fuse (BE±6)
4. Ignition Switch (BE±8)
5. Wiper and Washer Switch (BE±36)
6. Wire Harness

Front wiper does not operate.

1. Front Wiper and Washer Switch (BE±36)
2. Front Wiper Motor (BE±38)
3. Wire Harness

Rear wiper does not operate.

1. Rear Wiper and Washer Switch (BE±37)
2. Rear Wiper Motor and Relay (BE±39)
3. Wire Harness

Front washer does not operate.

1. Front Wiper and Washer Switch (BE±36)
2. Washer Motor (BE±39)
3. Wire Harness

Rear washer does not operate.

1. Rear Wiper and Washer Switch (BE±37)
2. Washer Motor (BE±39)
3. Wire Harness
± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEMBE±35

Page 638 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INT time control
switch positionVoltage
Approx. 1±3 sec.
SLOW
FAST
Approx. 10 ±15 sec.
Battery positive voltage
0 volt
Battery positive voltage
0 volt
WIPER AND WASHER SWITCH
INSPECTION
1. INSPECT F

INT time control
switch positionVoltage
Approx. 1±3 sec.
SLOW
FAST
Approx. 10 ±15 sec.
Battery positive voltage
0 volt
Battery positive voltage
0 volt
WIPER AND WASHER SWITCH
INSPECTION
1. INSPECT FRONT WIPER AND WASHER SWITCH
CONTINUITY

Switch position

Tester connection to
terminal number
Specified condition
Wiper OFF B4±B7 Continuity
Wiper OFF and
MIST
B7±B18

Continuity
Wiper INT B4±B7 Continuity Wiper INT and MIST B7±B18 Continuity Wiper LO B7±B18 Continuity Wiper LO and MIST B7±B18 Continuity
Wiper HI

B13±B18

Continuity
Wiper HI and MIST

B7±B13
B13±B18

Continuity

Washer ON

B8±B16

Continuity
If continuity is not as specified, replace the switch.
Intermittent Operation
(a) Turn the wiper switch to INT position.
(b) Turn the intermittent time control switch to FAST position.
(c) Connect the positive (+) lead from the battery to terminal B18
and the negative (±) lead to terminal B16.
(d) Connect the positive (+) lead from the voltmeter to terminal
B7 and the negative (±) lead to terminal B16, check that the
meter needle indicates battery voltage.
(e) After connecting terminal B4 to terminal B18, connect it to
terminal B16.
Then, check that the voltage rises from O V to battery positive
voltage within the times, as shown in the table.
If operation is not as specified, replace the wiper and washer
switch. BE±36
± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEM

Page 639 of 2543

TOYOTA SUPRA 1995 Service Repair Manual Washer Linked Operation
(a) Connect the positive (+) lead from the battery to terminal B18
and the negative (±) lead to terminal B16.
(b) Connect the positive (+) lead from the voltmeter to termina

Page 640 of 2543

TOYOTA SUPRA 1995 Service Repair Manual WIPER MOTOR INSPECTION
1. INSPECT FRONT WIPER MOTOR OPERATION
Low Speed
Connect the positive (+) lead from the battery to terminal 3
and the negative (±) lead to terminal 1, check that the motor
op

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