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Home >> Chevrolet >> 2013 >> Corvette Base, 2D Convertible, Standard Trans, Trans Mfr CD 6L85M/MM6 >> Repair and Diagnosis >> Body & Frame >> Windows >> Fixed And MOVEABLE Window System >> Diagnostic Information and Procedures >> Rear Window Defogger Malfunction >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON, observe the operation of the rear window defogger grid while pressing the rear defog switch. The rear window defogger grid should turn ON or OFF each time the rear window defogger switch is pressed.
  2. Observe the operation of the rear window defogger indicator while pressing the rear window defogger switch. The indicator should turn ON or OFF each time the rear window defogger switch is pressed.
    • If the indicator does not turn ON or OFF with each switch press, replace the HVAC control module.
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