Chrysler 1997 Stratus Convertible RHD Service Manual page 583

JX
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 on the circuit to determine operator
request. Ground for the control is provided on circuit
Z2.
When the signal is processed by the BCM it
grounds circuit C80. This is the coil of the relay.
Power for the coil is provided on circuit F13. This cir-
cuit 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 position 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.
8W - 48 REAR WINDOW DEFOGGER
8W-48 REAR WINDOW DEFOGGER
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
16 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 16 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
8W - 48 - 3