1995 TOYOTA SUPRA Service Repair Manual

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Page 617 of 2543

TOYOTA SUPRA 1995 Service Repair Manual COMBINATION SWITCH DISASSEMBLY
AND ASSEMBLY
COMBINATION SWITCH INSPECTION
1. INSPECT LIGHT CONTROL SWITCH CONTINUITY
Switch position

Tester connec

Page 618 of 2543

TOYOTA SUPRA 1995 Service Repair Manual HEADLIGHT CONTROL RELAY
INSPECTION
INSPECT RELAY CONTINUITY
Condition

Tester connection to
terminal number
Specified cond

Page 619 of 2543

TOYOTA SUPRA 1995 Service Repair Manual INTEGRATION RELAY INSPECTION
INSPECT RELAY CIRCUIT
Light Auto Turn Off System
Remove the relay from junction block and inspect the con-
nectors on the wire harness and junction block side, as
shown in

INTEGRATION RELAY INSPECTION
INSPECT RELAY CIRCUIT
Light Auto Turn Off System
Remove the relay from junction block and inspect the con-
nectors on the wire harness and junction block side, as
shown in the chart.

Tester connection to
terminal number
Condition
Specified condition
A6±Ground Driver's door courtesy switch OFF No continuity
A6±Ground Driver's door courtesy switch ON Continuity
A10±Ground Constant Continuity
B1±Ground Light control switch position OFF or TAIL No continuity
B1±Ground Light control switch position HEAD Continuity
B4±Ground Light control switch position OFF No continuity B4±Ground Light control switch position TAIL or HEAD Continuity A1±Ground Constant Battery positive voltage
A7±Ground

Ignition switch position LOCK or ACC

No voltage
A7±Ground Ignition switch position ON Battery positive voltage
B2±Ground Constant Battery positive voltage
B3±Ground Constant Battery positive voltage
If the circuit is as specified, try replacing the relay with a new
one.
If the circuit is not as specified, inspect the circuits connected
to other parts.
DOOR COURTESY SWITCH INSPECTION
See page BE±28
± BODY ELECTRICAL SYSTEMHEADLIGHT AND TAILLIGHT SYSTEMBE±17

Page 620 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DAYTIME RUNNING LIGHT MAIN RELAY
INSPECTION
INSPECT RELAY CIRCUIT
Disconnect the connector from relay and inspect the connec-
tor on wire harness side, as shown.

T

DAYTIME RUNNING LIGHT MAIN RELAY
INSPECTION
INSPECT RELAY CIRCUIT
Disconnect the connector from relay and inspect the connec-
tor on wire harness side, as shown.

Tester connection to
terminal number
Condition

Specified condition

5±Ground

Headlight dimmer switch position Low
beam or high beam
No continuity
5±Ground Headlight dimmer switch position Flash Continuity 8±Ground Parking brake switch position OFF No continuity 8±Ground Parking brake switch position ON Continuity
16±Ground

Headlight dimmer switch position Low beam

No continuity
16±Ground Headlight dimmer switch position Flash or
High beam Continuity

13±Ground

Constant

Continuity
18±Ground Constant Continuity
2±Ground Ignition switch position LOCK or ACC No voltage
2±Ground Ignition switch position ON Battery positive voltage
11±Ground Engine Stop No voltage
11±Ground Engine Running Battery positive voltage
15±Ground
15±Ground
17 GroundConstantBattery positive voltage 17±Ground Constant Battery ositive voltage
If the circuit is as specified, trying replacing the relay with a
new one. If the circuit is not as specified, inspect the circuit
connected to other parts.
PARKING BRAKE SWITCH INSPECTION
See page BE±52 BE±18
± BODY ELECTRICAL SYSTEMHEADLIGHT AND TAILLIGHT SYSTEM

Page 621 of 2543

TOYOTA SUPRA 1995 Service Repair Manual DAYTIME RUNNING LIGHT RELAY No.2
INSPECTION
INSPECT RELAY CONTINUITY
Condition

Tester connection to
terminal number
Speci

Page 622 of 2543

TOYOTA SUPRA 1995 Service Repair Manual TURN SIGNAL AND HAZARD
WARNING SYSTEM
PARTS LOCATION
BE±20± BODY ELECTRICAL SYSTEMTURN SIGNAL AND HAZARD WARNING SYSTEM

Page 623 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)

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

Page 624 of 2543

TOYOTA SUPRA 1995 Service Repair Manual HAZARD WARNING SWITCH
INSPECTION
INSPECT SWITCH CONTINUITY

Condition

Tester connection to
terminal number

Specified con

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