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

The rear window defogger system, also known as
electric backlight (EBL), consists of two vertical bus
bars (1) linked by a series of grid lines (2) fired onto
the inside surface of the rear window (3).

The EBL system is turned On or Off by a switch and a
timing circuit integral to the A/C-heater control located
at the center of the instrument panel.

Circuit protection is provided by two cartridge fuses
located in the integrated power module (IPM). One
fuse is for the control circuit and the other fuse is for
the heated grid circuit.

8G - 6

HEATED GLASS - SERVICE INFORMATION

DR/DH

OPERATION

The electric backlight (EBL) system is controlled by a
momentary switch (1) located in the A/C-heater control
(2) on the instrument panel. When the rear window
defogger switch is pressed to the On position, the
A/C-heater control energizes the rear window defog-
ger (EBL) relay and the heated mirror relay, which
then directs battery current to the rear defogger grid
lines and to the heated side view mirrors. The grid
lines heat the glass to help clear the rear window and
side mirror surfaces of fog or frost.

An amber indicator (3) in the rear window defogger
switch will illuminate to indicate when the EBL system
is turned on. The A/C-heater control contains the EBL
system control circuitry including the timer logic.

NOTE: The EBL system turns off automatically
after approximately ten minutes of operation.

The EBL system will be automatically turned off after a
programmed time interval of about ten minutes each
time the rear window defogger switch is pressed. The EBL system will automatically shut off if the ignition switch is
turned to the Off position, or it can be turned off manually by pressing the rear window defogger switch a second
time.

Repair of the rear window defogger grid lines, bus bars, terminals or pigtail wires can be accomplished using the
Mopar Rear Window Defogger Repair Kit (Part Number 04549275) or equivalent (Refer to 8 - ELECTRICAL/
HEATED GLASS/REAR WINDOW DEFOGGER GRID - STANDARD PROCEDURE - GRID LINE AND TERMINAL
REPAIR).

DIAGNOSIS AND TESTING

ELECTRIC BACKLIGHT (EBL) AND HEATED MIRROR SYSTEM

NOTE: Illumination of the defogger switch indicator lamp does not necessary mean that electrical current is
reaching the rear window glass and/or the outside rear view mirror heating grids.

NOTE: For circuit descriptions and diagrams of the rear window defogger (EBL) and heated mirror systems,
refer to 8W - WIRING DIAGRAM INFORMATION.

Operation of the electrical backlight (EBL) and heated mirror systems can be confirmed by the following:

DR/DH

HEATED GLASS - SERVICE INFORMATION

8G - 7

Content .. 336 337 338 339 ..