Heated Glass Element: Description and Operation

Rear Window Defogger Switch Location:

HEATED WINDOW DEFOGGER
The system consists of a rear glass with two vertical bus bars and a series of electrically connected grid lines fired on the inside surface. A control switch and a timing circuit are combined into a single assembly

A push-button at the center of the instrument panel, below the radio, turns the defroster ON or OFF.

Circuit protection is provided by a cartridge fuse located in the Power Distribution Center (PDC) for the heated grid circuit, and by a fuse in the fuse block for the control circuit.

When the switch is turned to the ON position, current is directed to the rear defogger grid lines. The heated grid lines heat the rear glass to clear the surface of fog or frost. An amber light shows that the defroster is ON.

NOTE: The defroster turns OFF automatically after 10 minutes of operation. Each following activation of the defroster will last for five minutes.

CAUTION: Grid lines can be damaged or scraped off with sharp instruments. Care should be taken in cleaning glass or removing foreign materials, decals or stickers. Normal glass cleaning solvents or hot water used with rags or toweling is recommended.

Rear Window Defogger Switch Location:

DEFOGGER SWITCH
The rear window defogger switch is a control switch and timing circuit integrated into a single panel mounted assembly. The switch is located on the instrument panel center, just below the radio. The rear window defogger switch and the rear window defogger switch LED indicator cannot be repaired and, if faulty or damaged, the entire switch assembly must be replaced.

Actuating the switch energizes the circuit which allows current to flow through the grid lines. Upon initial actuation for approximately eight to ten minutes, or until either the switch or ignition is turned OFF. An indicating lamp illuminates a Light Emitting Diode (LED) inlaid in the control switch.