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.