TSRM/MK3 Supra/Repair Manual
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BE/Body Electrical System — Mirror Heater, page 54

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p.055
Mirror Heater — MK3 Supra Body Electrical System, page 54
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Page text (OCR transcript)
MIRROR HEATER
Rear Window Defogger and Mirror
Heater Switch
INSPECTION OF SWITCH
(See page BE-47)

Mirror Heater
INSPECTION OF MIRROR HEATER
MEASURE HEATER RESISTANCE
Measure the resistance between terminals 1 and 5.
Resistance: 7.6 — 10.2 Ω at 20 °C (68°F)
If resistance value is not specified, replace the mirror.
HINT: The resistance value increases as the temperature
rises.