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61-1
120Ć3
Rear Window Defogger System Components
The rear window defogger system consist of the
following components:
S
HVAC control module
S
Liftgate module (LGM)
S
Rear window defogger grid
Rear Window Defogger Operation
Battery positive voltage is supplied through the LGM 2
fuse to the LGM for the rear window defogger system.
When you turn the ignition to the ON position, and the
rear window defogger switch is depressed. The HVAC
control module illuminates the rear window defogger
indicator and sends a class 2 message to the LGM to
enable the rear window defogger system. The LGM
enable the rear window defogger system by allowing
battery positive voltage to the rear window defogger.
When you turn ON the ignition and press the rear
window defogger switch for the first time, the defogger
cycle lasts 10 minutes. Further operation results in
10 minute defogger cycles.
Circuit Operation
REAR DEFOGGER
61-2
REAR DEFOGGER
(Refer to Section 201 for photographs.)
Component
Photo No.
Fuse Block–Rear
Under the left rear seat
52
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HVAC Control Module
In the IP center trim panel, beneath the radio
75
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liftgate Module (LGM)
Inside the liftgate
113
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connector
C900
Top of the liftgate
107
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
G401
On lower left D–pillar
109
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
63
AIR CONDITIONING: MANUAL
A/C Compressor Clutch Assemby (4.2L)
A/C Compressor Clutch Assemby (5.3L)
A/C Low Pressure Switch
A/C Refrigerant Pressure Sensor (4.2L)
A/C Refrigerant Pressure Sensor (5.3L)
A/C Relay 44
Air Temperature Actuator-Auxiliary
Air Temperature Actuator-Left
Air Temperature Actuator-Right
Blower Motor
Blower Motor Control Processor-Auxiliary
Blower Motor Resistor Assembly
Blower Motor Switch-Front Auxiliary
Blower Motor-Auxiliary
Console Mode Actuator
Coolant Bypass Valve
Defrost Actuator
Fuse Block-Rear
Fuse Block-Underhood
HVAC Control Module
HVAC Control Module-Auxiliary
Mode Actuator
Mode Actuator-Auxiliary
Powertrain Control Module (PCM) (4.2L)
Powertrain Control Module (PCM) (5.3L)
Recirculation Actuator
SP201
Component Index
63-0
AIR CONDITIONING: MANUAL (Blower Controls)
HOT AT ALL TIMES
HVAC
CONTROL
MODULE
Connector
BLOWER
MOTOR
RESISTOR
ASSEMBLY
F
G
FUSE
BLOCK-
REAR
Connector
HOT AT ALL TIMES
FUSE
BLOCK-
UNDERHOOD
Connector
B
BLOWER
Fuse 35
40A
HVAC
Fuse 44
30A
HOT IN RUN
HVAC I
Fuse 39
10A
HVAC-B
Fuse 36
10A
HOT IN RUN
D8
A8
C1
BRN
3
ORN
0.35
BRN
0.35
Ignition
3
voltage
Battery
positive
voltage
Ground
Blower
motor
switch
Off
blower
motor-
control
B
C
H
D
M
RED
5
Blower
motor
relay
See
Ground
Distribution,
page 14.
See
Ground
Distribution,
page 14-5.
BLK
0.5
BLOWER
MOTOR
Connector
OFF
HIGH
ORN
2
LOW
MED3
G
C2
B5
B7
C1
G201
SP201
C
D
A
B
LO
K
BLK/
WHT
0.35
G102
M1
M2
M3
E
C
A
87A
87
86
85
30
E
BLK/
WHT
0.8
PPL
2
LT BLU
2
TAN
2
YEL
2
DK GRN
1
C2
A
F
A11
C6
C1
A8
D
B
C1
RED
3
PPL
A
B
BLK
See Power
Distribution,
page 10-15.
See Power
Distribution,
page 10-15.
M
E
D
2
M
E
D
1
See Power
Distribution,
page 10-7.
BRN
0.35
ORN
0.35
Circuit Schematic
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