CHEVROLET PLYMOUTH ACCLAIM 1993 Service Manual

WINDSHIELD WIPER AND WASHER SYSTEMS
CONTENTS
page page
GENERAL WIPER INFORMATION ........... 1
INTERMITTENT WINDSHIELD WIPER MOTOR AND SWITCH SERVICE PROCEDURES .... 12
WINDSHIELD WASHERS ................. 17 WINDSHIELD WIPER BLADE AND ARM SERVICE
PROCEDURES ......................... 1
WINDSHIELD WIPER MOTOR AND LINKAGE ASSEMBLY SERVICE PROCEDURES ....... 3
GENERAL WIPER INFORMATION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAG, SEE GROUP 8M, RESTRAINT SYSTEMS FOR
STEERING WHEEL OR COLUMN REMOVAL PROCE-
DURES.
The windshield wipers can be operated with the
windshield wiper switch only when the ignition
switch is in the ACCESSORY or IGNITION position.
A fuse, located in the fuse block, protects the cir-
cuitry of the wiper system and the vehicle. The wiper motor has permanent magnet fields. The speeds are determined by current flow to the appro-
priate set of brushes. The intermittent wipe system, in addition to low
and high speed, has a delay mode. The delay mode
has a range of 2 to 15 seconds. This is accomplished
by a variable resistor in the wiper switch and is con-
trolled electrically by a relay. The wiper system completes the wipe cycle when
the switch is turned OFF. The blades park in the
lowest portion of the wipe pattern.
WINDSHIELD WIPER BLADE AND ARM SERVICE PROCEDURES
WIPER BLADES
Wiper blades, exposed to the weather for a long pe-
riod of time, tend to lose their wiping effectiveness.
Periodic cleaning of the wiper blade is suggested to
remove the accumulation of salt and road film. The
wiper blades, arms, and windshield should be cleaned
with a sponge or cloth and a mild detergent or nona-
brasive cleaner. If the blades continue to streak or
smear, they should be replaced.
WIPER BLADE ELEMENT CHANGE
(1) Turn wiper switch ON, position blades to a con-
venient place by turning the ignition switch ON and
OFF. (2) Lift wiper arm to raise blade off glass.
(3) Remove blade assembly from arm by inserting
a small screwdriver blade into release slot of wiper
blade and push downward (Fig. 1 and 2), or push re-
lease button (2). (4) To remove wiping element from blade assem-
bly:
² Place blade assembly on a working surface
² Apply pressure backwards to open up the blade as-
sembly (Fig. 3)
² By pushing downward and pulling away remove
the wiping element, or lift tab on one end links and
squeeze link to remove from center bridge.
Fig. 1 Wiper Blade and Element
Fig. 2 Blade Assembly from Arm
Ä WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 1

² Slide end link off element from claws of other link
(Fig. 4), or by grasping the rubber element where the
channel is and pull the element out for replacement. (5) To install reverse above procedures.
(6) Check each bridge claw for positive locking
when installing blade element, and blade assembly
for positive locking.
WIPER ARM REPLACEMENT
AG AND AJ BODIES
REMOVAL
Lift the arm to permit the latch (Fig. 5) to be
pulled out to the holding position then release the
arm. Arm front will remain off windshield in this po-
sition. Remove the arm from the pivot using a rock-
ing motion.
INSTALLATION For proper installation of wiper arm, refer to Wiper
Arm Adjustment.
AA, AC, AP AND AY BODIES
REMOVAL
(1) Lift the wiper arm and place a 3.17mm (1/8
inch) pin into the arm pin hole (Fig. 6).
(3) Remove the wiper arm from the pivot using a
rocking motion.
INSTALLATION
(1) Clean the wiper pivot shaft of any metal filings
using a wire brush. (2) Position wiper arm so that the blade tip is
19.05 mm (3/4 inch) from the top of the cowl screen.
Fig. 3 Wiper Element
Fig. 4 Wiping Element from Blade Assembly
Fig. 5 Removing Wiper ArmÐAG and AJ Bodies
Fig. 6 Removing Wiper ArmÐAA, AC, AP and AY Bodies 16
(2) Lift the head cover (Fig. 7) and remove the
wiper arm attaching nut.
Fig. 7 Wiper Arm Head Cover and NutÐAA, AC, AP and AY Bodies
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(3) Secure arm to pivot with attaching nut and
tighten 17 to 22 N Im (155 to 195 in. lbs.) torque.
(4) Close head cover and remove pin from arm pin
hole.
WIPER ARM ADJUSTMENT
FRONT ARM ADJUSTMENT
(1) Cycle the wiper motor into the PARK position.
(2) Check the tips of the blades in blackout area.
From the bottom edge of the windshield to the blade
should be no closer than 25 mm (1 inch) (Fig. 8). (3) Operate the wipers if the requirements are not
met, check linkage and pivot assembly for worn
parts.
REAR ARM ADJUSTMENT
With the motor in the park position, mount the
arm on the motor shaft. Choose a serration engage-
ment that positions the blade, parallel with the bot-
tom edge of the liftgate glass.
WINDSHIELD WIPER MOTOR AND LINKAGE ASSEMBLY SERVICE PROCEDURES
INDEX
page page
Front Wiper Motor AssemblyÐAG and AJ Bodies . 6
Rear Wiper Motor AssemblyÐAG Body ........ 8
Rear Wiper MotorÐAG Body Test ............ 6 Wiper Motor and Linkage AssemblyÐAA, AC, AY
Bodies ................................ 8
Wiper Motor and Linkage AssemblyÐAP Body . . 10
Wiper Motor System Test Procedures .......... 3
WIPER MOTOR SYSTEM TEST PROCEDURES
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAG, SEE GROUP 8M, RESTRAINT SYSTEMS FOR
STEERING WHEEL OR COLUMN REMOVAL PROCE-
DURES.
Whenever a wiper motor malfunction occurs, first
verify that the wiper motor wire harness is properly
connected to all connectors before starting normal di-
agnosis and repair procedures. Refer to Wiper Motor
Diagnosis Chart (Fig. 9). The following is a list of general wiper motor sys-
tem problems, the tests that are to be performed to
locate the faulty part, and the corrective action to be
taken. These tests will cover both two speed and in-
termittent wipe functions.
TWO SPEED MOTOR FUNCTION TESTS
CONDITION: MOTOR WILL NOT RUN IN ANY SWITCH POSITION
PROCEDURE
(1) Check for a blown fuse in the fuse block. (a) If fuse is good, proceed to step 2.
(b) If fuse is defective, replace and check motor
operation in all switch positions. (c) If motor is still inoperative and the fuse does
not blow, proceed to step 2. (d) If replacement fuse blows, proceed to step 5.
(2) Place switch in LOW speed position.
(3) Listen to motor. If you cannot hear it running,
proceed to Step 4. If you hear it running, check motor
output shaft. If output shaft is not turning, replace
motor assembly. If it is turning, drive link to output
shaft or linkage is not properly connected. Replace
worn parts and/or properly connect drive link to the
motor output shaft. (4) Connect a voltmeter between motor terminal 3
and ground strap (Fig. 10). If there is no voltage or very
little voltage (less than one volt) present, move nega-
tive test lead from the ground strap to negative battery
terminal. (a) If an increase in voltage is noticed, the problem
is a bad ground circuit. Make sure the motor mount-
ing is free of paint and that nuts or bolts are tight. (b) If there is still no indication of voltage, the
problem is an open circuit in the wiring harness or
wiper switch. (c) If no more than 3 volts increase in voltage is
observed, the problem is a faulty motor assembly.
(5) Disconnect motor wiring connector and replace
fuse. (a) If fuse does not blow, motor is defective.
(b) If fuse blows, switch or wiring is at fault.
Fig. 8 Windshield Wiper Arm Adjustment
Ä WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 3

Fig. 9 Windshield Wiper Motor Diagnosis
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CONDITION: MOTOR RUNS SLOWLY AT ALL SPEEDS
PROCEDURE
(1) Disconnect wiring harness connector at motor.
Remove wiper arms and blades. Connect an ammeter
between battery (B+) and terminal 3 on motor (Fig.
11).
(a) If motor runs and average ammeter reading
is more than 6 amps, proceed to step 2. (b) If motor runs and average ammeter reading
is less than 6 amps, proceed to step 3.
(2) Check to see if wiper linkage or pivots are
binding or caught. Disconnect drive link from motor. (a) If motor now runs and draws less than 3
amps, repair linkage system. (b) If motor continues to draw more than 3 amps,
replace motor assembly.
(3) Check motor wiring harness for shorting be-
tween high and low speed wires as follows: (a) Connect a voltmeter or test lamp to motor
ground strap. (b) Set wiper switch to LOW position.
(c) Connect other lead of voltmeter to terminal 4
of the wiring harness. (d) If voltage is present, there is a short in the
wiring or wiper switch. If no voltage is present pro-
ceed to step e. (e) Set wiper switch to HIGH position.
(f) Move voltmeter lead from terminal 4 to termi-
nal 3 of the wiring harness. (g) If voltage is present, there is a short in the
wiring or wiper switch.
CONDITION: MOTOR WILL RUN AT HIGH SPEED, BUT NOT AT LOW SPEED. MOTORWILL RUN AT LOW SPEED, BUT NOT AT HIGHSPEED
PROCEDURE
(1) If motor will not run on high speed, put switch
in HIGH position and connect a test lamp between
motor Terminal 4 and ground (Fig. 12).
(2) If motor will not run on low speed, put switch
in LOW position and connect a test lamp between
motor Terminal 3 and ground. (3) If test lamp does not light at motor terminal,
there is an open in wiring or switch. If test lamp
lights at motor terminal, replace motor assembly.
CONDITION: MOTOR WILL KEEP RUNNING WITH SWITCH IN OFF POSITION
PROCEDURE
Remove wiring harness. Connect jumper from Ter-
minal 1 to Terminal 3 of wiper motor (Fig. 13). Con-
nect second jumper from Terminal 2 to battery (B+).
If motor runs to PARK position and stops, wiper
switch is faulty. If motor keeps running and does not
park, replace motor assembly.
Fig. 10 Voltmeter Between Terminal 3 and Ground
Fig. 11 Ammeter Between Terminal 3 and Battery
Fig. 12 Test Lamp Between Terminal 4 and Ground
Ä WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 5

CONDITION: MOTOR WILL STOP WHEREVER IT IS, WHEN COLUMN SWITCH IS PUT IN OFFPOSITION. THE WIPERS DO NOT CONTINUERUNNING TO PARK POSITION
PROCEDURE
(1) Remove motor wiring connector and clean ter-
minals. Reconnect connector and test motor.If prob-
lem persists, proceed to Step 2. (2) Set wiper switch to OFF position. Disconnect
motor wiring connector. Connect a voltmeter or test
lamp to the motor ground strap. Connect the other
lead to terminal 2 of wiring connector. (a) If voltage is not present, check for an open
circuit in the wiring harness or wiper control
switch. (b) If voltage is present, proceed to step 3.
(3) Connect an ohmmeter or continuity tester be-
tween terminals 3 and 1 (Fig. 14). (a) If there is continuity between these termi-
nals, the problem is a defective motor. (b) If there is no continuity, the problem is an
open circuit in the wiper control switch or wiring
harness.
REAR WIPER MOTORÐAG BODY TEST
The following test is used in order to locate and
then repair liftgate wiper motor defects. Refer to
Group 8W, Wiring Diagrams for liftgate wiper motor
wiring schematic. (1) Remove lower cover on liftgate (Fig. 15).
(2) Disconnect feed connector from wiper motor.
(3) With ignition switch in ON position, check for
battery voltage at blue wire. (4) With ignition switch in ON position and wiper
switch ON, check for battery voltage at blue and
brown wire. If battery voltage is not present in steps
3 and 4, check fuse, liftgate wiper switch and wiring. (5) With ignition switch in ON position, and wiper
switch in OFF position, check for battery voltage be-
tween blue and brown wires. If battery voltage is not
present, check ground wire to liftgate switch. (6) If battery voltage is present in steps 3 and 4,
replace motor.
FRONT WIPER MOTOR ASSEMBLYÐAG and AJ
BODIES
REMOVAL
(1) Park system.
(2) Open the hood assembly.
(3) Remove wiper arms and blades, disconnect
hoses from tee connector (Fig. 16).
Fig. 13 One Jumper Wire Between Terminal 1 and 3. One Jumper Wire Between Terminal 2 and Battery positive
Fig. 14 Ohmmeter Between Terminals 3 and 1
Fig. 15 Liftgate Lower Cover
8K - 6 WINDSHIELD WIPER AND WASHER SYSTEMS Ä

Fig. 16 Windshield Wiper Motor and LinkageÐAG and AJ Bodies
Ä WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 7

(4) Remove the cowl top plastic screen.
(5) Remove pivot screws.
(6) Remove wiper motor cover and disconnect wiring
harness. (7) Remove three motor mounting nuts.
(8) Push pivots down into plenum chamber and pull
motor out until it clears the mounting studs. Then
move it as far to the drivers side or outboard as it will
go. Pull right pivot and link out through opening. Shift
motor to opposite side or inboard of opening and
remove motor, left link and pivot. (9) Clamp motor crank in a vise and remove nut
from end of motor shaft. Do not rotate motor output
shaft from PARK position.
INSTALLATION
(1) Assemble linkage to motor. Make sure crank fits
over D slot on motor shaft. Tighten mounting nut to 10
to 11 N Im (90 to 100 in. lbs.) torque. Be sure motor is
still in park position before assembling to linkage, if
not temporarily connect motor to wiring and operate
switch to position motor in park before assembling
linkage. (2) Place left pivot and link into plenum chamber.(a) Slide it all the way to the left or outboard side
until motor clears studs and crank is behind sheet
metal. (b) Push right pivot and link through opening.
(c) Move assembly right and position motor on
studs.
(3) Install three motor mounting nuts and tighten 7
to8N Im (60 70 in. lbs.) torque.
(4) Position pivots and install pivot screws and
tighten 7 to 8 N Im (60 to 70 in. lbs.) torque.
(5) Connect wiring to motor.
(6) Install motor cover. Tighten screws to 4 N Im (35
in. lbs.) torque. (7) Attach reservoir hose to T-connector through hole
provided in cowl screen. (8) Use plastic fasteners to install cowl screen.
(9) Install arm and blade assemblies. Refer to Wiper
Arm Adjustment. Connect arm washer hoses to
T-connector.
REAR WIPER MOTOR ASSEMBLYÐAG BODY
REMOVAL
(1) Remove arm and blade assembly, refer to Arm
and Blade Removal. (2) Unlock and open liftgate.
(3) Remove trim panel refer to Group 23, Body.
(4) Disconnect feed wire connector from motor.
(5) Remove grommet from liftgate glass (Fig. 17). (6) Remove two screws fastening bracket to liftgate
(Fig. 18).
(7) Remove motor from liftgate.
INSTALLATION
(1) Install new grommet in liftgate glass.
(2) Position motor to liftgate and secure with two
screws. Tighten screws 7 to 8 N Im (60 to 70 in. lbs.)
torque. (3) Connect feed wires to motor.
(4) Install trim panel.
(5) Install and adjust arm and blade assembly re-
fer to Arm Assembly. Tighten nut 17 to 19 N Im (150
to 170 in. lbs.) torque.
WIPER MOTOR AND LINKAGE ASSEMBLYÐAA,
AC, AY BODIES
REMOVAL
(1) Open hood assembly.
(2) Remove wiper arms (Fig. 19 and 20).
Fig. 17 Liftgate Wiper Grommet
Fig. 18 Liftgate Wiper MotorÐAG Body
8K - 8 WINDSHIELD WIPER AND WASHER SYSTEMS Ä

Fig. 19 Windshield Wiper Motor and LinkageÐAC and AY Bodies
Ä WINDSHIELD WIPER AND WASHER SYSTEMS 8K - 9

(3) Remove cowl top plastic cover.
(4) Remove three attaching screws from each pivot.
(5) Disconnect the wiper motor wiring harness.
(6) Remove three bolts that attach motor mounting
bracket to body. (7) Remove wiper motor, bracket, and linkage as-
sembly from cowl plenum. (8) Clamp motor crank in a vise and remove nut
from end of motor shaft. Do not rotate motor out-
put shaft from PARK position.
INSTALLATION
(1) Assemble linkage to motor. Make sure crank
fits over D slot on motor shaft. Tighten mounting nut
10 to 11 N Im (90 to 100 in. lbs.) torque. Be sure mo-
tor is still in park position before assembling to link-
age, if not temporarily connect motor to wiring and
operate switch to position motor in park before as-
sembling linkage. (2) Install wiper motor, bracket, crank and linkage
assembly into cowl plenum. (3) Loosely install pivots and hose connector with
three attaching screws. (4) Secure motor mounting bracket screws to body
and tighten to 7 to 8 N Im (60 to 70 in. lbs.) torque.
(5) Tighten pivot attaching screws to 7 to 8 N Im
(60 to 70 in. lbs.) torque. (6) Attach wiper motor wiring harness. (7) Cycle wiper motor and turn OFF. To ensure
wiper motor is in the park position. (8) Install cowl top plastic cover.
(9) Install and adjust wiper arm assembly tighten
to 17 to 19 N Im (150 to 170 in. lbs.) torque.
WIPER MOTOR AND LINKAGE ASSEMBLYÐAP
BODY
REMOVAL
(1) Open hood assembly.
(2) Remove wiper arms (Fig. 21).
(3) Remove cowl top plastic cover.
(4) Disconnect the wiper motor wiring harness.
(5) Remove retaining nuts from the pivot mount-
ing studs. (6) Remove the three bolts that attach motor
mounting bracket to body. (7) Remove wiper motor, bracket, and linkage as-
sembly from cowl plenum. (8) Clamp motor crank in a vise and remove nut
from end of motor shaft. Do not rotate motor out-
put shaft from PARK position.
INSTALLATION
(1) Assemble linkage to motor. Make sure crank
fits over D slot on motor shaft. Tighten mounting nut
10 to 11 N Im (90 to 100 in. lbs.) torque. Be sure mo-
Fig. 20 Windshield Wiper Motor and LinkageÐAA Body
8K - 10 WINDSHIELD WIPER AND WASHER SYSTEMS Ä