Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
System Description
- GENERAL
The defogger system's thin heater wires are attached to the inside of the rear window and defog the window surface quickly. The indicator light illuminates while the system is operating. The system automatically turns off after approximately 15 minutes.
HINT:
The rear window defogger is linked with the mirror defogger.
- FUNCTION OF MAIN COMPONENT FUNCTION OF MAIN COMPONENT
Component Outline RR DEF Relay Receives rear defogger activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to rear window defogger. Rear Window Defogger Receives power from RR DEF relay and heats defogger wire. with Deicer Relay Receives front deicer activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to front window deicer. with Deicer Front Window Deicer Receives power from DEICER relay and heats deicer wire. - DESCRIPTION COMPONENT FUNCTION
Function Outline Defogs the rear window surface - Receives rear defogger activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to rear window defogger.
- Receives power from RR DEF relay and heats defogger wire.
Defogs the front window surface - Receives front deicer activation request signals from A/C amplifier assembly (A/C ECU) and supplies power to front window deicer.
- Receives power from DEICER relay and heats deicer wire.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.