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Home >> Lexus >> 2008 >> SC 430 >> Repair and Diagnosis >> Body & Frame >> Windows >> Windshield/WINDOWGLASS >> Window Defogger System >> System Description
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System Description

  1. GENERAL 

    The rear window defogger system's thin heater wires are attached to the inside of the rear window and defog the window surface. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.

  2. FUNCTION OF MAIN COMPONENT 
    FUNCTION OF MAIN COMPONENT

    Component Outline
    Defogger switch Located on A/C control, detects defogger switch operation and transmits signals to luggage room junction block ECU through BEAN line
    DEFOG relay Receives rear defogger activation request signals from A/C control and supplies power to rear window defogger
    Rear window defogger wire Receives power from DEFOG relay and heats defogger wire
  3. DESCRIPTION 
    FUNCTION DESCRIPTION

    Function Outline
    Defogs the rear window surface
    • Receives rear defogger activation request signals from A/C control and supplies power to rear window defogger
    • Receives power from DEFOG relay and heats defogger wire