Auto-Dimming Mirrors Inoperative
- Check Mirror Operation - Turn ignition on. Place transmission in Park. Set mirror sensitivity to high position (if adjustable). Cover photocell on backside of mirror with a dark cloth. Shine a flashlight on reflective side of mirror. If inside and left side mirrors darken, system is okay. If mirrors do not darken, go to next step.
- Check Fuse - Check fuses. If fuses are okay, go to next step. If automatic dimming mirror fuse is blown, replace fuse. If fuse repeatedly blows check mirror power circuit for short-to-ground. See appropriate WIRING DIAGRAM .
- Check Power At Mirror
- Unplug harness connector from rear of inside mirror. Turn ignition on. Check for battery voltage at power wire(s). See DIMMING MIRRORS POWER CIRCUIT table. If battery voltage is measured, go to next step. If battery voltage is not measured, repair suspect circuit. See appropriate WIRING DIAGRAM
.DIMMING MIRRORS POWER CIRCUIT
Application Wire Color Explorer Red/White & Light Green Yellow - Check Ground Circuit - Measure resistance of Black wire between inside mirror connector and chassis ground. If resistance is less than 5 ohms, go to next step. If resistance is greater than 5 ohms, repair open black wire.
- Check Reverse Signal - Turn ignition on. Check for battery voltage at Black/Pink wire at inside mirror connector in all transmission ranges. Battery voltage should be present only in Reverse. If battery voltage is present only in Reverse, replace inside mirror assembly. If battery voltage is present in other than Reverse, repair back-up lights system.