What to know about the Rear Window Defogger Switch:
The rear window defogger is a grid of surface-mounted wires on the rear window of your car. Electricity flows through the grid and the wires generate heat that melts snow and ice from the window and removes moisture that fogs up the glass. The power for the rear window defogger is controlled by a switch at the driver’s discretion and by itself turns off after a set time. The rear window defogger switch lights up when in use to show when the system is on. If the rear window defogger switch fails to complete a circuit or gets stuck, the rear window defogger will not function.
Facts to Note:
Always be careful when driving in inclement weather.
It is advisable to clear snow from the rear window before letting the defogger handle the rest.
How to Fix:
The fuses are inspected and dash trim panel is taken out for access to switch
The defective rear window defogger switch is tested and removed
The new rear window defogger switch is fixed
The dash trim panel is reinstalled
The rear window defogger is tested for proper functioning
The window defogger switch doesn’t need attention unless the rear defogger system is not functioning at all. If you suspect the rear window defogger switch is faulty, have it tested and replaced by one of your expert mechanics.
Common symptoms indicating you may need to changethe Rear Window Defogger Switch:
Rear window defogger simply is not clearing the window
Defogger works erratically
Defogger button doesn’t light up
Importance of this service:
The rear window defogger switch is crucial for maintaining visibility through the rear window. If the switch fails, have it changedimmediately.