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Home >> Lexus >> 2007 >> SC 430 >> Repair and Diagnosis >> Accessories & Equipment >> Headlights >> Lighting >> Headlight Relay >> On-Vehicle Inspection

On-Vehicle Inspection

  1. INSPECT HEADLIGHT RELAY (Marking: HEAD LP) 
    1. Remove the HEAD LP relay from the engine room No. 1 relay block.
    2. Measure the resistance of the relay.
      Fig 1: Identifying Headlight Relay Connector Terminals
      G05292797Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard resistance 

      RESISTANCE SPECIFICATION

      Tester Connection Specified Condition
      1 - 2 10 kΩ or higher
      1 - 2 Below 1 Ω (when battery voltage is applied to terminals 3 and 4)