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Home >> Lexus >> 2002 >> LX 470 >> Repair and Diagnosis >> Accessories & Equipment >> Steering Column Switches >> Circuit Tests >> Light Control Switch Circuit

Light Control Switch Circuit

  1. Connector Disconnected -  Disconnect the connector from the combination switch and inspect the connector on the wiring harness side. See CONNECTOR IDENTIFICATION . See INSPECTING LIGHT CONTROL SWITCH CIRCUIT (CONNECTOR DISCONNECTED)  table. If the circuit is not as specified, inspect the wiring harness. See HEADLIGHTS under SYSTEM WIRING DIAGRAMS in ELECTRICAL.
    INSPECTING LIGHT CONTROL SWITCH CIRCUIT (CONNECTOR DISCONNECTED)

    Tester Connection Condition Specified Condition
    13 - Ground Constant B+ Voltage
    14 - Ground Constant B+ Voltage
  2. Connector Connected -  Connect the wiring harness side connector to the combination switch and inspect the connector from the back side. See CONNECTOR IDENTIFICATION . See INSPECTING LIGHT CONTROL SWITCH CIRCUIT (CONNECTOR CONNECTED)  table. If the circuit is not as specified, inspect the wiring harness. See HEADLIGHTS under SYSTEM WIRING DIAGRAMS in ELECTRICAL.
    INSPECTING LIGHT CONTROL SWITCH CIRCUIT (CONNECTOR CONNECTED)

    Tester Connection Condition Specified Condition
    16 - Ground Constant Continuity
    13 - Ground Light Control Switch OFF Or TAIL B+ Voltage
    13 - Ground Light Control Switch HEAD No Voltage
    14 - Ground Light Control Switch OFF B+ Voltage
    14 - Ground Light Control Switch TAIL Or HEAD No Voltage