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91-2
WINDSHIELD WIPER/WASHER: VARIABLE INTERMITTENT
BLK
0.35
BLK/WHT
0.35
BLK
0.35
BLK
1
B12
Instrument
Cluster
Logic
See Gauges
and Indicator
INSTRUMENT
PANEL
CLUSTER
(IPC)
Connector
WINDSHIELD
WASHER
FLUID
LEVEL
SWITCH
Connector
G103
2
1
BLK/WHT
0.35
J
C105
Connector
YEL
0.35
FUSE
BLOCK-
REAR
Connector
RAIN
Fuse 29
10A
HOT IN ACC AND RUN
C3
F1
FUSE
BLOCK-
REAR
Connector
C1
D10
BLK
0.35
A
To A on
page 91
C3
F4
OUTSIDE
MOISTURE
SENSOR
Connector
3
1
2
Outside
moisture
sensor
signal 1
Ground
See Ground
Distribution,
page 14-6.
BLK
0.35
BLK
5
G302
Accessory
voltage
BLK
1
See Ground
Distribution,
page 14.
Circuit Schematic
91-3
120Ć3
Windshield Wiper/Washer System Components
The windshield wiper/washer system consists of the
following components:
S
Windshield wiper/washer switch
S
Windshield wiper motor
S
Windshield washer pump
S
Windshield washer relay
S
Outside moisture sensor
S
FRT WIPER 25A fuse
S
W/S WASH 15A fuse
Windshield Wiper/Washer System Operation
Accessory voltage and ground is supplied to the
windshield wiper motor and provides the power for
operating the wiper motor and logic power to the wiper
motor module. The WASH, MIST, LOW, and DELAY
modes are controlled by the windshield wiper/washer
switch through a series of internal resistors. The
windshield wiper switch supply voltage circuit is a
12-volt reference from the wiper motor module to the
wiper/washer
switch,
and
the
switch
position
determines the point on the resistor assembly where
the reference voltage is applied. The windshield wiper
switch signal 1 circuit supplies the voltage from the
resistor assembly to the wiper motor module and the
signal voltage determines the operating mode. High
speed operation is controlled by the windshield
wiper/washer switch through the windshield wiper
switch high signal circuit. The windshield wiper switch
high signal circuit is supplied 12 volts by the wiper motor
module and when the wiper/washer switch is turned to
the HIGH position the windshield wiper switch high
signal circuit is grounded through the switch ground
circuit. The windshield washer pump is controlled
through the windshield wash relay. The windshield
wash relay coil and switch is supplied battery positive
voltage, and during WASH mode the wiper motor
module grounds the washer relay control circuit
energizing the relay. When the relay is energized
battery positive voltage to the switch side of the relay is
supplied to the washer pump control circuit. The
windshield wiper switch signal 2 circuit from the wiper
motor module is used by the body control module as a
signal to turn on the low beam headlamps.
Moisture Sensitive Wipers
The outside moisture sensor monitors moisture
accumulation on the windshield and provides an input
to the windshield wiper motor module. If no moisture is
detected, the wipers will not operate in the DELAY
modes. The windshield wiper switch signal 1 circuit is
used to activate the automatic operating mode and to
adjust the level of sensitivity to moisture accumulation
when commanding a wiper motor wipe cycle. The
moisture sensor sends a PWM voltage signal to the
wiper motor module through the moisture sensor signal
1 circuit whenever the ignition is in the accessory or run
positions. If at anytime the moisture sensor signal 1
circuit PWM voltage signal input to the wiper motor
module is lost, the wiper motor module will use the input
from the windshield wiper switch signal 1 circuit to
operate the wiper motor at continuous variable delay
intervals.
Check Washer Fluid Message
The Check Washer Fluid message is controlled by the
instrument panel cluster using an input from the washer
fluid level switch. The washer fluid level signal circuit is
supplied ignition voltage through a resistor then
monitored within the instrument cluster. The washer
fluid level switch is normally open so the instrument
cluster detects ignition voltage on the washer fluid level
signal circuit whenever the washer fluid level is not low.
When the washer fluid reaches the point where the
driver should be informed that the washer fluid is low,
the washer fluid level switch closes. When the washer
fluid level switch is closed the washer fluid level signal
circuit voltage is pulled low, and the instrument panel
displays the Check Washer Fluid message on the
driver information center. In order to prevent the Check
Washer Fluid message from being displayed while
sloshing is occurring in the washer fluid container, the
instrument cluster is programmed with a 1 minute delay
before changing states of the Check Washer Fluid
message during an ignition cycle.
Circuit Operation
WINDSHIELD WIPER/WASHER: VARIABLE INTERMITTENT
91-4
WINDSHIELD WIPER/WASHER: VARIABLE INTERMITTENT
(Refer to Section 201 for photographs.)
Component
Photo No.
Body Control Module
(BCM)
On Rear Fuse Block, under left rear seat
53
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Wiper Motor
Under cowl cover (cover removed)
17
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Rear
Under the left rear seat
52
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuse Block-Underhood
Left side of engine compartment
3
. . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instrument Panel Cluster
(IPC)
On the left side of the IP, above the steering column
59
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
Outside Moisture Sensor
Attached to windshield, near inside rearview mirror
. . . . .
Turn Signal/Multifunction
Switch
On the stalk, on the left side of the steering column
71
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
Windshield Washer Fluid
Level Switch
Attached to the fluid reservoir in the underhood compartment
11
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Windshield Washer Fluid
Pump (Front)
Attached to the fluid reservoir in the underhood compartment
12
. . . . . . . . . . . . .
. . . . . . . . . . . . . . . .
Connector
C105 (17-BLK)
Left side of engine compartment
4
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C201 (17-BLK), (18-BLK),
and (13-GRY)
At base of steering column
120
. . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground
G102
Left side of engine compartment
4
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G103
Right rear of engine compartment
15
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G104
Left Rear of Hood
9
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G105
Left side of engine compartment
4
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G302
On the lower left B-pillar
105
. . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Location Index
92
REAR WIPER/WASHER
Body Control Module (BCM)
Fuse Block-Rear
Fuse Block-Underhood
Liftgate Module (LGM)
Rear Window Wiper/Washer Switch
SP201
Window Washer Fluid Pump-Rear
Window Wiper Motor-Rear
Component Index
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