TSRM/MK2 Supra/Repair Manual
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BE/Body Electrical System — Lighting Troubleshooting, page 12

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Lighting Troubleshooting — MK2 Supra Body Electrical System, page 12
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Page text (OCR transcript)
LIGHTING
Troubleshooting

Problem | Possible cause | Remedy | Page

Only one light does not light (all exterior) | Light bulb burned out | Replace bulb |
 | Socket, wire or ground faulty | Repair as necessary |

No headlights light | Fusible link blown | Replace fusible link |
 | Headlight control relay faulty | Check relay | BE-14
 | Light control switch faulty | Check switch | BE-13
 | Wiring or ground faulty | Repair as necessary |

High beam headlights or headlight flasher do not operate | Light control switch faulty | Check switch | BE-13
 | Wiring faulty | Repair as necessary |

Tail, parking and license light do not light | TAIL fuse blown | Replace fuse and check for short | BE-4
 | Fusible link blown | Replace fusible link |
 | Taillight control relay faulty | Check relay | BE-14
 | Light control switch faulty | Check switch | BE-13
 | Wiring or ground faulty | Repair as necessary |

Stop lights do not light | STOP fuse blown | Replace fuse and check for short | BE-4
 | Stop light switch faulty | Adjust or replace switch |
 | Wiring or ground faulty | Repair as necessary |

Stop lights stay on | Stop light switch faulty | Adjust or replace switch |

Instrument lights do not light (taillights light) | Light control rheostat faulty | Check rheostat | BE-17
 | Wiring or ground faulty | Repair as necessary | B

Turn signal does not flash on one side | Turn signal switch faulty | Check switch | BE-18
 | Wiring or ground faulty | Repair as necessary |

Turn signals do not operate | TURN fuse blown | Replace fuse and check for short | BE-4
 | Turn signal flasher faulty | Check flasher | BE-19
 | Turn signal/hazard switch faulty | Check switch | BE-18
 | Wiring or ground faulty | Repair as necessary |

Hazard warning lights do not operate | HAZ-HORN fuse blown | Replace fuse and check for short | BE-4
 | Turn signal flasher faulty | Check flasher | BE-19
 | Turn signal/hazard switch faulty | Check switch | BE-18
 | Wiring or ground faulty | Repair as necessary |