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Rear Defogger Switch

WARNING: This page is about a different car, the 1997 Mercury Mountaineer and 1997 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
  1. Unplug rear defogger switch. Connect switch terminal No. 4 (Black wire on mating connector) to ground. Apply battery voltage to terminal No. 6 (Dark Green/Purple wire on mating connector). Defogger indicator light should come on.
  2. Apply battery voltage to switch terminal No. 5 (Red/Black wire on mating connector). Switch illumination light should come on.
  3. Disconnect jumper wires from switch. Depress and hold switch button while checking for continuity between switch terminals No. 3 (Dark Blue/Orange wire on mating connector) and No. 4 (Black wire on mating connector). Continuity should exist. Continuity should not exist with switch released (OFF position). If operation is not as specified, replace switch.
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