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Headlight Dimmer Switch: Inspection

  1. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY 
    1. Inspect the light control switch.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        LIGHT CONTROL SWITCH RESISTANCE

        Tester Connection Condition Specified Condition
        12 - 18 OFF 10 k or higher
        12 - 19
        12 - 20
        12 - 18 TAIL Below 1
        12 - 18
        12 - 20        		 HEAD Below 1
        12 - 19 AUTO Below 1

        If the result is not as specified, replace the switch assembly.

        Fig 1: Identifying Headlight Dimmer Switch Assembly Connector Terminals
        G04475889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Inspect the headlight dimmer switch.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        HEADLIGHT DIMMER SWITCH RESISTANCE

        Tester Connection Condition Specified Condition
        11 - 12 FLASH Below 1
        11 - 17
        12 - 16 LOW BEAM Below 1
        11 - 12 HIGH BEAM Below 1

        If the result is not as specified, replace the switch assembly.

    3. Inspect the turn signal switch.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        TURN SIGNAL SWITCH RESISTANCE

        Tester Connection Condition Specified Condition
        12 - 13 Right turn Below 1
        12 - 13 Neutral 10 k or higher
        12 - 15
        12 - 15 Left turn Below 1

        If the result is not as specified, replace the switch assembly.

    4. Inspect the fog light switch.
      1. Measure the resistance according to the value(s) in the table below.

        Standard resistance 

        FOG LIGHT SWITCH RESISTANCE

        Tester connection Condition Specified condition
        3 - 4 OFF 10 k or higher
        3 - 4 Front fog light switch ON Below 1

        If the result is not as specified, replace the switch assembly.

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