Wiper And Washer Systems - Jeep 1997 Grand Cherokee Service Manual

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GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
BODY CONTROL MODULE . . . . . . . . . . . . . . . . 3
INTERMITTENT WIPE RELAY . . . . . . . . . . . . . . 4
REAR WIPER AND WASHER SYSTEM
WASHER NOZZLE AND PLUMBING
WASHER PUMP . . . . . . . . . . . . . . . . . . . . . . . . . 4
WASHER RESERVOIR . . . . . . . . . . . . . . . . . . . . 4
WINDSHIELD WASHER SYSTEM
WINDSHIELD WIPER SYSTEM . . . . . . . . . . . . . 1
WIPER ARM AND BLADE
WIPER LINKAGE AND PIVOT
WIPER MOTOR . . . . . . . . . . . . . . . . . . . . . . . . . 2
GENERAL INFORMATION
INTRODUCTION
Following are general descriptions of the major
components in the wiper and washer systems. Refer
to 8W-53 - Wipers in Group 8W - Wiring Diagrams
for complete circuit descriptions and diagrams.
NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
model. Whenever required and feasible, the RHD
versions of affected vehicle components have been
constructed as mirror-image of the LHD versions.
While most of the illustrations used in this group
represent only the LHD version, the diagnostic and
service procedures outlined can generally be
applied to either version. Exceptions to this rule
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
DESCRIPTION AND OPERATION
WINDSHIELD WIPER SYSTEM
An intermittent windshield wiper system is stan-
dard equipment. This system lets the driver select
from either of two wiper speeds, or the intermittent
wipe mode. The intermittent wipe mode is provided
by delay logic and relay control circuitry contained
within the Body Control Module (BCM), and an
intermittent wipe relay.
The intermittent wipe mode delay times are speed
sensitive. Above about sixteen kilometers-per-hour

WIPER AND WASHER SYSTEMS

CONTENTS
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WIPER AND WASHER SYSTEMS
page
WIPER SWITCH AND WASHER SWITCH . . . . . . 3
DIAGNOSIS AND TESTING
INTERMITTENT WIPE RELAY . . . . . . . . . . . . . . 8
WASHER SYSTEM
WIPER SWITCH AND WASHER SWITCH . . . . . . 7
WIPER SYSTEM
REMOVAL AND INSTALLATION
INTERMITTENT WIPE RELAY
WASHER PUMP AND RESERVOIR
WIPER ARM . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
WIPER BLADE AND ELEMENT . . . . . . . . . . . . . 9
WIPER LINKAGE AND PIVOT
WIPER MOTOR . . . . . . . . . . . . . . . . . . . . . . . . 11
WIPER SWITCH AND WASHER SWITCH . . . . . 13
(ten miles-per-hour) the delay is driver adjustable
from about one-half second to about eighteen sec-
onds. Below about sixteen kilometers-per-hour (ten
miles-per-hour) the BCM doubles the delay time, or
provides delays of about one second to about thirty-
six seconds.
Models equipped with the optional automatic head-
lamp system have a programmable feature in the
BCM that will energize the headlamps automatically,
whenever the windshield wipers are turned on. Refer
to the proper Diagnostic Procedures manual for more
information on enabling or disabling this feature.
The windshield wipers will operate only when the
ignition switch is in the Accessory or On positions. A
circuit breaker located in the junction block protects
the circuitry of the windshield wiper system. Refer to
the owner's manual for more information on the
windshield wiper system controls and operation.
WINDSHIELD WASHER SYSTEM
A electrically operated windshield washer system is
standard equipment. A reservoir in the engine com-
partment holds the washer fluid, which is pressur-
ized by a pump when the windshield washer (multi-
function) switch is actuated. The windshield washer
pump feeds the pressurized washer fluid through the
washer system plumbing to the windshield washer
nozzles.
Vehicles with the optional Vehicle Information Cen-
ter (VIC) have a low washer fluid warning feature
that will warn the driver when the washer fluid level
needs to be checked. Refer to Group 8E - Instrument
Panel Systems for more information on this feature.
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8K - 1
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