Headlight Dimmer Switch: Inspection

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester connection	Switch operation	Specified resistance
   10 - 11 11 - 12 10 - 13	OFF	10 kΩ or higher
   10 - 13	TAIL	Below 1 Ω
   10 - 13 11 - 12	HEAD	Below 1 Ω

   Fig 1: Identifying (C12) Headlight Dimmer Switch Assembly Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester connection	Switch operation	Specified resistance
   8 - 11 9 - 11	FLASH	Below 1 Ω
   8 - 11	LOW BEAM	Below 1 Ω
   9 - 11	HI BEAM	Below 1 Ω

   HINT:

   Turn light control switch to the HEAD position when checking "LOW BEAM" and "HI BEAM".

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester connection	Switch operation	Specified resistance
   6 - 7	Right turn	Below 1 Ω
   5 - 6 6 - 7	Neutral	10 kΩ or higher
   5 - 6	Left turn	Below 1 Ω

Inspect front fog light switch continuity.

1. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE SPECIFICATION
   
   

   Tester connection	Switch operation	Switch operation
   2 - 4	OFF	10 kΩ or higher
   2 - 4	ON	Below 1 Ω