TSRM/MK4 Supra/Repair Manual
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BE/Body Electrical Systems — Troubleshooting, page 11

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Troubleshooting — MK4 Supra Body Electrical Systems, page 11
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Page text (OCR transcript)
BODY ELECTRICAL SYSTEM – HEADLIGHT AND TAILLIGHT SYSTEM

BE–11

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.

USA:

Trouble | Parts name | (See page)

Headlight does not light
(Taillight is normal)
1. FL MAIN
2. HEAD Fuse (LH, RH) | (BE–5)
3. Headlight Control Relay | (BE–16)
4. Headlight Dimmer Switch | (BE–15)
5. Light Control Switch | (BE–15)
6. Integration Relay | (BE–17)
7. Wire Harness
8. Headlight Bulb

Headlight does not light
(Taillight does not light up)
1. FL MAIN
2. Light Control Switch | (BE–15)
3. Integration Relay | (BE–17)
4. Wire Harness
5. Headlight Bulb

Only one side light does not light
1. HEAD Fuse (LH, RH) | (BE–5)
2. Headlight Bulb
3. Wire Harness

"Lo–Beam" does not light
1. Headlight Dimmer Switch | (BE–15)
2. Wire Harness

"Hi–Beam" does not light
1. Headlight Dimmer Switch | (BE–15)
2. Wire Harness

"Flash" does not light
1. Headlight Dimmer Switch | (BE–15)
2. Wire Harness

CANADA:

Trouble | Parts name | (See page)

Headlight does not light
(Taillight is normal)
1. FL MAIN
2. Headlight Control Relay
3. Daytime Running Light Relay | (BE–18)
4. Daytime Running Light No.2 and No.3 Relay | (BE–19)
5. Headlight Dimmer Switch | (BE–15)
6. Light Control Switch | (BE–15)
7. Integration Relay | (BE–17)
8. Wire Harness
9. Headlight Bulb

Headlight does not light
(Taillight does not light up)
1. FL MAIN
2. Light Control Switch | (BE–15)
3. Daytime Running Light Relay | (BE–18)
4. Daytime Running Light No.2 and No.3 Relay | (BE–19)
5. Integration Relay | (BE–17)
6. Wire Harness