Rear Window Defogger Operation

INTRODUCTION
For proper operation of the Rear Window Defogger system refer to the Owner's Manual.

Rear Window Defogger - Typical:

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 timer relay combined into a single assembly is used on all models.

Circuit protection is provided by a maxi fuse, located in the Power Distribution Center, for the heated grid circuit and by a fuse for the relay 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.

CAUTION: Grid lines can be damaged or scraped oft 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.

NOTE: This information covers both Left-Hand Drive (LHD) and Right-Hand Drive (RHD) versions of this model. Whenever required and feasible, the RHD versions of affected vehicle components have been constructed as mirror-Image of the LHD versions. While most of the illustrations used represent only the LHD version, the diagnostic and service procedures outlined can generally be applied to either version. Exceptions to this rule have been clearly identified as LHD, RHD, or Export If a special illustration or procedure is required.

SYSTEM OPERATION
Rear Window Defogger Switch
The rear window defogger switch is a control switch and timer relay integrated into a single panel mounted assembly. 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 lens inlaid in the control switch.