TSRM/MK4 Supra/Repair Manual
Repair ManualWiring Diagrams
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BE/Body Electrical Systems21 / 203
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TROUBLESHOOTING — MK4 Supra Body Electrical Systems, page 21
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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.