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Window Defogger Switch: Inspection

  1. INSPECT CENTER CLUSTER MODULE SWITCH (DEFOGGER SWITCH) 
    1. Check operation of the defogger timer.
      1. Connect the battery's positive (+) lead to terminal 3 and the negative (-) lead to terminal 4.
      2. Connect the 1.4 W test bulb, as shown in the illustration.
      3. Push the rear window defogger switch ON, check that the switch and test bulb illuminate for 12 to 18 minutes, and then they go off. If the result is not as specified, replace the switch.
        Fig 1: Identifying Center Cluster Module Switch (Defogger Switch)
        G04159029Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002