Dodge ZB 2005 Service Manual page 270

ZB
HEATED GLASS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
ELECTRIC BACKLIGHT (EBL) SYSTEM
REAR WINDOW DEFOGGER RELAY
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . 2
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
HEATED GLASS
DESCRIPTION
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 recom-
mended.
The rear window defogger system, also known as
electric backlight (EBL), consists of two vertical bus
bars linked by a series of grid lines fired onto the
inside surface of the rear window (Fig. 1).
The EBL system is turned On or Off by a switch
and timing circuit, which are integral to the A/C-
heater control located at the center of the instrument
panel.
Circuit protection is provided by a fuse located in
the power distribution center (PDC).
OPERATION
The electric backlight (EBL) system is controlled
by a momentary switch (Fig. 2) located in the A/C-
heater control 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 defogger (EBL) relay, which then directs
fused battery current through the relay and to the
rear defogger grid lines. The grid lines heat the glass
to help clear the rear window surface of fog or frost.
An amber indicator in the rear window defogger
switch will illuminate to indicate when the EBL sys-
tem 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
ten minutes of initial operation. Each following acti-
HEATED SYSTEMS
TABLE OF CONTENTS
page
REMOVAL
INSTALLATION
REAR WINDOW DEFOGGER SWITCH
DESCRIPTION
. . . . . 2 OPERATION
REAR WINDOW DEFOGGER GRID
STANDARD PROCEDURE
GRID LINE AND TERMINAL REPAIR
1 - VERTICAL BUS BARS
2 - GRID LINES
3 - REAR WINDOW GLASS
vation cycle of the EBL system will last five min-
utes.
The EBL system will be automatically turned off
after an initial programmed time interval of about
ten minutes. After the initial time interval has
expired, if the rear window defogger switch is turned
on again during the same ignition cycle, the EBL sys-
tem will automatically turn off after about five min-
utes. 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 win-
dow 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 -
HEATED SYSTEMS 8G - 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . 3
. . . . . . . . . . . . . . . . . . . . . . . . . . 4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fig. 1 Rear Window Defogger (EBL) Grid
page
. . . . . . . . 4