TSRM/MK4 Supra/Repair Manual
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BE/Body Electrical Systems — Troubleshooting, page 21

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Troubleshooting — MK4 Supra Body Electrical Systems, page 21
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Page text (OCR transcript)
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)

"Hazard" and "Turn" 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.

Right Turn

Left Turn

Connector "A"

N08902
N08922
200357

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.