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Headlight Dimmer Switch: Inspection

  1. INSPECT HEADLIGHT DIMMER SWITCH 
    1. Measure the resistance according to the value (s) in the table below.
      Fig 1: Identifying Headlight Dimmer Switch Connector Terminals
      G05243157Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Resistance: Light control switch 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester connection Condition Specified condition
      12 - 16
      13-16
      14-16      		 OFF 10 kΩ or higher
      14 - 16 TAIL Below 1 Ω
      13 - 16
      14-16      		 HEAD Below 1 O
      12 - 16 AUTO Below 1 Ω

      Headlight dimmer switch 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester connection Condition Specified condition
      16 - 17 LOW Below 1 Ω
      7 - 16 HIGH Below 1 Ω
      7 - 16
      8 - 16      		 FLASH Below 1 Ω

      Turn signal switch 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester connection Condition Specified condition
      2 - 3 Right turn Below 1 Ω
      1 - 2
      2 - 3      		 Neutral 10 kΩ or higher
      1 - 2 Left turn Below 1 Ω

      Fog light switch 

      TESTER CONNECTION SPECIFIED CONDITION REFERENCE CHART

      Tester connection Condition Specified condition
      10 - 11 OFF 10 kΩ or higher
      10 - 11 ON Below 1 Ω

      If the result is not as specified, replace the headlight dimmer switch.

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