TSRM/MK3 Supra/Repair Manual
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BE/Body Electrical System — Lighting Troubleshooting, page 17

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Lighting Troubleshooting — MK3 Supra Body Electrical System, page 17
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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 |

Headlights do not flip up | Fusible link blown | Replace fusible link | BE-4
 | RTR fuse blown | Replace fuse and check for short |
 | Light retractor control relay faulty | Check relay | BE-23
 | Light retractor motor faulty | Check motor | BE-24
 | Wiring or ground faulty | Repair as necessary |

No headlights light | Fusible link blown | Replace fusible link |
 | Headlight control relay faulty | Check relay | BE-22
 | Light control switch faulty | Check switch | BE-22
 | Wiring or ground faulty | Repair as necessary |

High beam headlights or headlight flasher do not operate | Light control switch faulty | Check switch | BE-22
 | Wiring faulty | Repair as necessary |

Tail and license lights 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-22
 | Light control switch faulty | Check switch | BE-22
 | Light retractor control relay faulty | Check relay | BE-23
 | GRADUAL |
 | 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-28
 | Wiring or ground faulty | Repair as necessary |

Turn signal does not flash on one side | Turn signal switch faulty | Check switch | BE-22
 | 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-26
 | Turn signal switch faulty | Check switch | BE-22
 | 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-26
 | Hazard warning switch faulty | Check switch | BE-26
 | Wiring or ground faulty | Repair as necessary |