Content .. 334 335 336 337 ..

Jeep Wrangler TJ. Manual - part 336

(5) Disconnect the body wire harness connector for

the front wiper motor from the motor pigtail wire
connector (Fig. 18).

(6) Remove the three screws that secure the front

wiper module mounting bracket to the cowl plenum
panel.

(7) Remove the front wiper module from the cowl

plenum panel as a unit.

DISASSEMBLY

The front wiper motor and its rubber boot are

available for service replacement. Following are the
procedures for disassembling these components from
the front wiper module unit.

(1) Remove the front wiper module from the cowl

plenum. (Refer to 8 - ELECTRICAL/FRONT WIP-
ERS/WASHERS/FRONT

WIPER

MODULE

REMOVAL).

(2) Release the retainer that secures the wiper

motor pigtail wire connector to the front wiper mod-
ule bracket.

(3) Turn the front wiper module over and remove

the nut that secures the wiper motor crank arm to
the wiper motor output shaft.

(4) Remove the three screws that secure the wiper

motor to the front wiper module mounting bracket.

(5) Remove the wiper motor from the front wiper

module bracket.

ASSEMBLY

The front wiper motor and its rubber boot are

available for service replacement. Following are the
procedures for reassembling these components onto
the front wiper module unit.

(1) Position the wiper motor onto the front wiper

module bracket.

(2) Install and tighten the three screws that secure

the wiper motor to the front wiper module bracket.
Tighten the screws to 8 N·m (70 in. lbs.).

(3) Position the wiper motor crank arm onto the

front wiper motor output shaft.

(4) Install and tighten the nut that secures the

wiper motor crank arm to the front wiper motor out-
put shaft. Tighten the nut to 12 N·m (101 in. lbs.).

(5) Engage the wiper motor pigtail wire connector

retainer in the locating hole on the front wiper mod-
ule bracket.

(6) Reinstall the front wiper module into the cowl

plenum. (Refer to 8 - ELECTRICAL/FRONT WIP-
ERS/WASHERS/FRONT

WIPER

MODULE

INSTALLATION).

INSTALLATION

(1) Position the front wiper module into the cowl

plenum as a unit (Fig. 18).

(2) Install and tighten the three screws that secure

the front wiper module mounting bracket to the cowl
plenum panel. Tighten the screws to 12 N·m (105 in.
lbs.).

(3) Reconnect the body wire harness connector for

the front wiper motor to the motor pigtail wire con-
nector.

(4) Reinstall the cowl plenum cover/grille panel

over the cowl plenum. (Refer to 23 - BODY/EXTERI-
OR/COWL GRILLE AND SCREEN - INSTALLA-
TION).

(5) Reconnect the battery negative cable.
(6) Close and latch the hood.
(7) Reinstall the front wiper arms onto the wiper

pivots. (Refer to 8 - ELECTRICAL/FRONT WIPERS/
WASHERS/FRONT WIPER ARM - INSTALLATION).

Fig. 18 Front Wiper Module Remove/Install

1 - SCREW (3)
2 - MODULE BRACKET
3 - WIRE HARNESS CONNECTOR
4 - WIPER MOTOR

FRONT WIPERS/WASHERS

8R - 17

FRONT WIPER MODULE (Continued)

RIGHT MULTI-FUNCTION
SWITCH

DESCRIPTION

The right multi-function switch is located on the

right side of the steering column (Fig. 19). The only
visible components of the right multi-function switch
are the control stalk and control knob that extend
through dedicated openings in the right side of the
steering column shrouds, just below the steering
wheel. The remainder of the switch, its mounting
provisions, and its electrical connections are all con-
cealed beneath the steering column shrouds. The
switch housing and controls are constructed of
molded black plastic. The right multi-function switch
is secured by two screws to a mounting housing that
is integral to the left multi-function switch.

The right multi-function switch control stalk has

both white nomenclature and International Control
and Display Symbols graphics applied to it, which
clearly identify its many functions. On the end of the
control stalk is a plastic control knob with a rounded
end and a flattened face to allow it to be easily
rotated. A single connector receptacle containing six
terminal pins is integral to the back of the switch
housing and connects the switch to the vehicle elec-
trical system through a dedicated take out and con-
nector of the body wire harness. The right multi-

function switch cannot be adjusted or repaired and, if
faulty or damaged, it must be replaced.

The right multi-function switch is the primary con-

trol for the front wiper and washer system, and con-
tains switches, circuitry, an intermittent wipe logic
circuit, and an internal wiper motor relay to provide
the following functions and features:

• Continuous Front Wipe Modes - The internal

circuitry and hardware of the right multi-function
switch control stalk provide two continuous front
wipe switch positions, low speed or high speed.

• Front Washer Mode - The internal circuitry

and hardware of the right multi-function switch con-
trol stalk provide front washer system operation.

• Front Wipe-After-Wash Mode - The internal

circuitry and hardware of the right multi-function
switch control stalk provide a wipe-after-wash mode.

• Front Wiper Mist Mode - The internal cir-

cuitry and hardware of the right multi-function
switch control stalk provide a front wiper system
mist mode.

• Intermittent Front Wipe Mode - The internal

circuitry and hardware of the right multi-function
switch control stalk and control knob provide an
intermittent front wipe mode with adjustable delay
interval positions.

Fig. 19 Multi-Function Switch

1 - LEFT MULTI-FUNCTION SWITCH CONTROL STALK
2 - HAZARD WARNING SWITCH BUTTON
3 - RIGHT MULTI-FUNCTION SWITCH CONTROL STALK
4 - SCREW (2)

5 - TURN SIGNAL CANCEL ACTUATOR
6 - LEFT MULTI-FUNCTION SWITCH CONTROL RING
7 - LEFT MULTI-FUNCTION SWITCH CONTROL KNOB

8R - 18

FRONT WIPERS/WASHERS

OPERATION

The right multi-function switch uses an internal

logic circuit, an internal relay and conventionally
switched outputs to control the many functions and
features it provides. The switch receives battery cur-
rent on a fused ignition switch output (run-acc) cir-
cuit from a fuse in the Power Distribution Center
(PDC) and the wiper and washer system fuse in the
fuse block whenever the ignition switch is in the On
or Accessory positions. The electronic intermittent
wipe logic circuit within the switch receives a logic
ground at all times through the body wire harness
from a take out with an eyelet terminal connector
secured under a ground screw on the left inner cowl
side panel, below the left end of the instrument
panel.

Following are descriptions of how the right multi-

function switch control stalk and control knob are
operated to control the functions and features they
provide. Refer to the owner’s manual in the vehicle
glove box for more information on the features, use
and operation of the right multi-function switch.

• Front Wash Mode - Pulling the control stalk of

the right multi-function switch towards the steering
wheel actuates the momentary single pole, single
throw front washer switch and operates the front
washer pump/motor.

• Front Wipe Modes - Moving the control stalk

of the right multi-function switch up or down to one
of four detent positions actuates the triple pole, qua-
druple throw front wiper switch and selects the Off,
Low, High, or Delay front wiper operating mode.
Moving the control stalk downward from the Off
position actuates a momentary single pole, single
throw switch that selects the Mist operating mode.

• Intermittent Front Wipe Delay Intervals -

Rotating the control knob on the end of the control
stalk actuates the front wiper delay variable resistor
and selects the wiper delay interval when the Delay
mode is selected with the front wiper switch control
stalk.

The intermittent wipe logic circuit within the right

multi-function switch monitors inputs from the front
wiper switch circuitry, the front washer switch cir-
cuitry, the front wiper delay variable resistor, and the
front wiper motor park switch. The programming of
the logic circuit then determines the proper outputs
to the front wiper motor. The low current logic circuit
controls the high current front wiper motor by pull-
ing the control coil of the integral wiper motor relay
to ground. The wiper motor relay switches a circuit
that feeds battery current to the low speed or high
speed brush of the front wiper motor through the
appropriate right multi-function switch circuits.

DIAGNOSIS AND TESTING - RIGHT MULTI-
FUNCTION SWITCH

Be certain to perform the diagnosis for the front

wiper system and/or front washer system before test-
ing the right multi-function switch. (Refer to 8 -
ELECTRICAL/FRONT WIPERS/WASHERS - DIAG-
NOSIS AND TESTING). Refer to the appropriate
wiring information. The wiring information includes
wiring diagrams, proper wire and connector repair
procedures, details of wire harness routing and
retention, connector pin-out information and location
views for the various wire harness connectors, splices
and grounds.

WARNING:

AVOID

PERSONAL

INJURY

DEATH, ON VEHICLES EQUIPPED WITH AIRBAGS,
DISABLE THE SUPPLEMENTAL RESTRAINT SYS-
TEM

BEFORE

ATTEMPTING

ANY

STEERING

WHEEL, STEERING COLUMN, AIRBAG, OR INSTRU-
MENT PANEL COMPONENT DIAGNOSIS OR SER-
VICE. DISCONNECT AND ISOLATE THE BATTERY
NEGATIVE (GROUND) CABLE, THEN WAIT TWO
MINUTES FOR THE SYSTEM CAPACITOR TO DIS-
CHARGE BEFORE PERFORMING FURTHER DIAG-
NOSIS OR SERVICE. THIS IS THE ONLY SURE WAY
TO DISABLE THE SUPPLEMENTAL RESTRAINT
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT.

(1) Disconnect and isolate the battery negative

cable.

(2) Remove the right multi-function switch from

the steering column and disconnect the body wire
harness connector for the switch from the switch con-
nector receptacle.

(3) Using an ohmmeter, check the right multi-func-

tion switch continuity at the terminals (Fig. 20) in
the switch connector receptacle as shown in the
Right Multi-Function Switch Tests table.

Fig. 20 Right Multi-Function Switch Connector

Receptacle

FRONT WIPERS/WASHERS

8R - 19

RIGHT MULTI-FUNCTION SWITCH (Continued)

RIGHT MULTI-FUNCTION SWITCH TESTS

SWITCH POSITION

CONTINUITY BETWEEN

PINS

OFF

1 & 6

*LOW

4 & 6

*MIST

4 & 6

HIGH

4 & 5

WASH

3 & 4

*DELAY

1 & 6

*The intermittent wipe logic circuit within the right
multi-function switch contains active electronic
elements, which cannot be tested using conventional
diagnostic tools. In addition, the function of the
normally open contacts of the wiper relay internal to
the switch cannot be tested properly unless the switch
is connected to battery current (Pin 4) and ground
(Pin 2). If all circuits and functions of the front wiper
system and the right multi-function switch are
operative except for the intermittent wipe, wipe-after-
wash feature, and/or the front wipers will not park,
replace the right multi-function switch with a known
good unit and test system operation again.

(4) If the right multi-function switch fails any of

the continuity checks, replace the faulty switch. If
the switch is OK, test and repair the front wiper and
washer system circuits between the right multi-func-
tion switch and the front wiper motor or the front
washer pump/motor as required.

REMOVAL

WARNING:

AVOID

PERSONAL

INJURY

DEATH, ON VEHICLES EQUIPPED WITH AIRBAGS,
DISABLE THE SUPPLEMENTAL RESTRAINT SYS-
TEM

BEFORE

ATTEMPTING

ANY

STEERING

(1) Disconnect and isolate the battery negative

cable.

(2) Remove the steering column opening cover

from the instrument panel. (Refer to 23 - BODY/IN-
STRUMENT PANEL/STEERING COLUMN OPEN-
ING COVER - REMOVAL).

(3) From below the steering column, remove the

two screws that secure the lower steering column
shroud to the upper shroud (Fig. 21).

(4) If the vehicle is equipped with the optional tilt

steering column, move the tilt steering column to the
fully lowered position and leave the tilt release lever
in the released (down) position.

(5) Remove both the upper and lower shrouds from

the steering column.

(6) Disconnect the body wire harness connector for

the left multi-function switch from the connector
receptacle on the back of the switch.

(7) Disconnect the body wire harness connector for

the right multi-function switch from the connector
receptacle on the back of the switch.

(8) Remove the two screws that secure the multi-

function switch assembly to the upper steering col-
umn housing (Fig. 22).

(9) Remove the multi-function switch assembly

from the upper steering column housing.

(10) Remove the two small screws that secure the

right multi-function switch to the left multi-function
switch mounting housing.

(11) Grasp the right multi-function switch control

stalk firmly and pull the switch toward the right far
enough to disengage the alignment pins on the top (1

Fig. 21 Steering Column Shrouds Remove/Install

1 - LEFT MULTI-FUNCTION SWITCH
2 - UPPER SHROUD
3 - RIGHT MULTI-FUNCTION SWITCH
4 - CLOCKSPRING
5 - IGNITION LOCK CYLINDER HOUSING
6 - LOWER SHROUD
7 - SCREW (2)

8R - 20

FRONT WIPERS/WASHERS

RIGHT MULTI-FUNCTION SWITCH (Continued)

Content .. 334 335 336 337 ..