1995 TOYOTA SUPRA wiper

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)
 
 
 
ºHazardº and ºTurnº do not light up
 
 
 
1. Hazard Warning Switch (BE±22)
2. Turn Signal Flasher (BE±22)
3. Wire Harness
 
 
 
The flashing frequency is abnormal
 
 
 
1. Bulb
2. Turn Signal Flasher (BE±22)
3. Wire Harness
 Hazard warning light does not light up
(Turn is normal) 1. HAZ±HORN Fuse (BE±5)
2. Wire Harness
 
 Hazard warning light does not light up in one direction
 
 1. Hazard Warning Switch (BE±22)
2. Wire Harness
 
 
 
 
*1 Turn signal does not light up
 
 
 
 
1. Ignition Switch (BE±8)
2. TURN Fuse (BE±6)
3. Turn Signal Switch (BE±21)
4. Wire Harness
 
 
 
*2 Turn signal does not light up
 
 
 
1. TURN Fuse (BE±6)
2. Turn Signal Switch (BE±21)
3. Wire Harness
 
 Turn signal does not light up in one direction
 
 
1. Turn Signal Switch (BE±21)
2. Wire Harness
 
 Only one bulb does not light up
 
 
1. Bulb
2. Wire Harness
*1: Combination Meter, Wiper and Washer do not operate.
*
2: Combination Meter, Wiper and Washer are normal.
TURN SIGNAL SWITCH INSPECTION
INSPECT SWITCH CONTINUITY 
 Switch position
 
 Tester connection to
terminal number
 
 Specified condition
 
 Left turn
 
 A1 ± A5
 
 Continuity 
 Neutral
 
 ±
 
 No continuity
 Right turn A1 ± A8 Continuity
If continuity is not as specified, replace the switch.
± BODY ELECTRICAL SYSTEMTURN SIGNAL AND HAZARD WARNING SYSTEMBE±21

WIPER AND WASHER SYSTEM
PARTS LOCATION
BE±34± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEM

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

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

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 terminal
B7 and the negative (±) lead to terminal B16.
(c) Push in the washer switch, check that the voltage changes
as shown in the table.
If operation is not as specified, replace the wiper and washer
switch.
2. INSPECT REAR WIPER AND WASHER SWITCH
CONTINUITY
 
 Switch position
 
 Tester connection to
terminal number
 
 Specified condition
 
 Washer ON (Lower)
 
 B2±B16
 
 Continuity
 Wiper OFF ± Continuity
 Wiper INT B10±B16 Continuity
 Wiper ON B1±B16 Continuity 
 

Washer ON (Upper)
 
 

B1±B2
B2±B16
 
 

Continuity
If continuity is not as specified, replace the switch.
± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEMBE±37

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
operates at low speed.
If operation is not as specified, replace the motor.
High Speed
Connect the positive (+) lead from the battery to terminal 2
and the negative (±) lead to terminal 1, check that the motor
operates at high speed.
If operation is not as specified, replace the motor.
Stopping at Stop Position
(a) Operate the motor at low speed and stop the motor operation
anywhere by disconnecting positive (+) lead from terminal 3.
(b) Connect terminals 3 and 5.
(c) Connect the positive (+) lead from the battery to terminal 6
and negative (±) lead to terminal 1, check that the motor
stops running at the stop position after the motor operates
again.
If operation is not as specified, replace the motor. BE±38
± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEM

2. INSPECT REAR WIPER MOTOR AND RELAY
OPERATION
(a) Connect the positive (+) lead from the battery to terminal 1,
and the negative (±) lead to terminal 3 and the motor body,
check that the motor operates.
(b) Disconnect the negative (±) lead from terminal 3, check that
the motor stops running at the stop position.
If operation is not as specified, replace the motor and relay.
Intermittent Operation
Connect the positive (+) lead from the battery to terminal 1,
and the negative (±) lead to terminal 2 and the motor body,
check that the motor operates intermittently for 9±15 se-
conds.
If operation is not as specified, replace the motor and relay.
WASHER MOTOR INSPECTION
INSPECT MOTOR OPERATION
Front Washer
Connect the positive (+) lead from the battery to terminal 2
and the negative (±) lead to terminal 1, check that the motor
operates.
NOTICE: These tests must be performed quickly (within
20 seconds) to prevent the coil from burning out.
If operation is not as specified, replace the motor.
Rear Washer
Connect the positive (+) lead from the battery to terminal 2
and the negative (±) lead to terminal 3, check that the motor
operates.
NOTICE: These tests must be performed quickly (within
20 seconds) to prevent the coil from burning out.
If operation is not as specified, replace the motor.
± BODY ELECTRICAL SYSTEMWIPER AND WASHER SYSTEMBE±39

A/C noise.Whining noise occurs when A/C is operating.
Fuel gauge noise.
NoiseNOISE PRODUCED WHEN ENGINE STARTS
Whistling noise which becomes high±pitched
when accelerator strongly depressed, disap-
pears shortly after engine stops.
Clicking sound heard when horn button is
pressed, then released. Whirring/grating sound
when pushed continuously.
Scratching noise occurs during sudden accelera-
tion, driving on rough roads or when ignition
switch is turned on.
Alternator noise.
Horn noise.
Ignition noise.
Turn signal noise.
Washer noise.
Murmuring sound, stops when engine stops.
Tick±tock noise, occurs in co±ordination with
blinking of flasher.
Noise occurs during window washer operation.
Scraping noise in time with wiper beat.
Scratching noise occurs while engine is running,
continues a while even after engine stops.
Other type of noise.
Engine coolant temp. gauge noise.
Wiper noise.
± BODY ELECTRICAL SYSTEMAUDIO SYSTEMBE±109