8W-48 REAR WINDOW DEFOGGER
INDEX
page
page
DESCRIPTION AND OPERATION
HELPFUL INFORMATION . . . . . . . . . . . . . . . . . . . 3
REAR WINDOW DEFOGGER . . . . . . . . . . . . . . . . 3
DESCRIPTION AND OPERATION
REAR WINDOW DEFOGGER
The rear window defogger system uses a relay
located in the junction block. This relay is protected
by two fuses and controlled by the Body Control
Module (BCM). When the operator pushes the ON
switch for the rear window defogger a signal is sent
to the BCM on circuit C58. The A/C- Heater control
uses resistors internal to the unit and the BCM mea-
sures the voltage drop on the circuit to determine
operator request. Ground for the control is provided
on circuit Z2 and terminates at the instrument panel
left side cowl after passing through the ground joint
in the junction block.
When the signal is processed by the BCM it
grounds circuit C80. This is the coil side of the relay.
Power for the coil side is provided on circuit F13.
This circuit also supplies power for the windshield
wipers and combo flasher. Circuit F13 is protected by
a 10 amp fuse in cavity 15 of the junction block and
is HOT in the ACCESSORY and RUN positions only.
Power for the fuse is provided on circuit A31 from
the ignition switch.
The A31 circuit receives power from the A1 circuit
which originates in the Power Distribution Center
(PDC) and is protected by a 20 amp fuse located in
cavity 8.
As current flows through the relay, contacts in the
relay CLOSE connecting circuits A4 and C15. The A4
circuit is protected by a 40 amp fuse located in cavity
12 of the PDC. Circuit C15 connects from the relay to
the rear window defogger grid and the heated mir-
rors.
The rear window defogger grid consists of two BUS
bars and grid lines that form a parallel circuit. When
current flows through the grid the grid lines heat up
and transfer the heat to the window. Ground for the
grid is provided on circuit Z1 and terminates at the
right rear wheel well.
When the system is in operation a Light Emitting
Diode (LED) located in the A/C-Heater control is illu-
minated.
HELPFUL INFORMATION
•
Check the 10 amp fuse located in the junction
block cavity 15
•
Check the 40 amp fuse located in cavity 12 of
the PDC
•
Check for broken grid lines on the window
•
Check for a broken BUS bar or disconnected
leads at the window
•
Check for a good ground at the right rear wheel
well
JA
8W - 48 REAR WINDOW DEFOGGER
8W - 48 - 3
Summary of Contents for Stratus LHD 1997
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Page 835: ...Fig 7 Body Splices 8W 95 6 8W 95 SPLICE LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
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Page 975: ...Adapter 6887 Camshaft Seal Installer 6863 9 138 2 5L ENGINE JA SPECIAL TOOLS Continued ...
Page 1001: ...13 6 BUMPERS AND FRAME JA SPECIFICATIONS Continued ...
Page 1065: ...Fuel Line Adapter 1 4 14 64 FUEL SYSTEM JA SPECIAL TOOLS Continued ...
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Page 1287: ...SPECIFICATIONS SUNROOF COMPONENTS 23 16 BODY JA ...
Page 1318: ...SPECIAL TOOLS BODY REMOVER MOLDINGS C 4829 STICK TRIM C4755 JA BODY 23 47 ...
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Page 1321: ...Fig 1 Floor Console 23 2 BODY JA REMOVAL AND INSTALLATION Continued ...
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Page 1401: ...FASTENER IDENTIFICATION 6 INTRODUCTION JA GENERAL INFORMATION Continued ...
Page 1404: ...METRIC CONVERSION JA INTRODUCTION 9 GENERAL INFORMATION Continued ...
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