CHEVROLET PLYMOUTH ACCLAIM 1993 Service Manual

(a) With brake pedal released, there should be
continuity:
² Between pin 1 and pin 4
² Between pin 3 and pin 6
² No continuity between pin 2 and pin 5
(b) With brake pedal depressed, there should be
no continuity:
² Between pin 1 and pin 4
² Between pin 3 and pin 6
² Continuity between pin 2 and pin 5
(2) If the above results are not obtained, the stop
lamp switch is defective or out of adjustment. (3) Stop lamp switch adjustment is detailed in
Group 5, Brakes.
VACUUM SUPPLY TEST
(1) Disconnect vacuum hose at the servo and in-
stall a vacuum gauge in the hose (Fig. 17).
(2) Start engine and observe gauge at idle. Vac-
uum gauge should read at least ten inches of mer-
cury. Shut off engine, the vacuum should continue to
hold 10 inches of mercury. (3) If vacuum does not meet this requirement,
check and correct the following vacuum leaks:
² Vacuum lines
² Check valve
² Vacuum reservoir
² Servo, refer to Servo Vacuum Test
² Poor engine performance
SERVO VACUUM TEST
(1) Remove the vehicle speed control cable at the
throttle body end. (2) Disconnect the 4-way electrical connector and
the vacuum harness at the servo (Refer to Fig. 12). (3) Connect battery voltage to pin 2 of the servo.
(4) Ground the remaining three servo pins 1, 3 and
4. (5) Connect a hand held vacuum pump to the servo
vacuum nipple and apply 10 to 15 inches of vacuum. (6) The cable should pull in and hold for as long as
vacuum is applied.
SERVO UNIT
REMOVAL
(1) Remove two nuts attaching vehicle speed con-
trol cable and mounting bracket to servo. (2) Remove screws attaching servo mounting
bracket. (3) Remove servo mounting bracket.
Fig. 15 Vehicle Speed Control Switch Continuity
Fig. 16 Stop Lamp and Vehicle Speed Control Switch Wiring
Fig. 17 Vacuum Gauge Test
Ä VEHICLE SPEED CONTROL 8H - 9

(4) Disconnect electrical connector and vacuum
hose. (5) Pull cable away from servo to expose retaining
clip and remove clip attaching cable to servo.
INSTALLATION
(1) With throttle in full open position align hole in
vehicle speed control cable sleeve with hole in servo
pin and install retaining clip. (2) Connect vacuum hose to servo.
(3) Connect electrical connector.
(4) Position mounting bracket and install screws
attaching bracket and tighten to 12 N Im (105 in.
lbs.) torque. (5) Insert servo studs through holes in vehicle
speed control cable and mounting bracket. (6) Install nuts, tighten to 7 N Im (60 in. lbs.)
torque.
VEHICLE SPEED CONTROL SWITCH REMOVAL
The vehicle speed control switch is mounted in the
steering wheel and wired through the clock spring
device under the steering wheel hub (Fig.1).
WARNING: IF REMOVAL OF AIR BAG MODULE IS
NECESSARY, REFER TO GROUP 8M, RESTRAINT
SYSTEMS.
REMOVAL
(1) Turn off ignition.
(2) Remove two screws from back side of steering
wheel. (3) Rock switch away from air bag or horn pad
while lifting switch out of steering wheel. (4) Disconnect 4-way electrical connector.
INSTALLATION
(1) Turn off ignition.
(2) Connect 4-way electrical connector from clock
spring to switch. (3) Place switch in steering wheel, sliding the for-
ward edge of switch under air bag or horn pad. Line
up locating pins on switch with holes in steering
wheel frame. (4) Attach switch to wheel with two screws start-
ing with the screw at the left end of the switch.
8H - 10 VEHICLE SPEED CONTROL Ä

TURN SIGNALS AND HAZARD WARNING FLASHER
CONTENTS
page page
AG AND AJ BODIES ..................... 1
CHIME FUNCTIONÐAC, AG, AJ AND AY .... 1
DUAL-FUNCTION SWITCHÐAG AND AJ BODIES.5
GENERAL INFORMATION .................. 1
HAZARD WARNING SYSTEM .............. 1
MULTI-FUNCTION SWITCHÐAA, AC, AP AND AY BODIES .............................. 2 REMOTE TURN SIGNAL SWITCH REMOVALÐAG
AND AJ BODIES ....................... 5
TESTING PROCEDURES ................... 2
TURN SIGNAL AND HAZARD WARNING FLASHER LOCATION ............................ 6
TURN SIGNAL RELAYSÐAG AND AJ BODIES . 6
GENERAL INFORMATION
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAG, SEE GROUP 8M, RESTRAINT SYSTEMS FOR
AIRBAG REMOVAL PROCEDURES.
TURN SIGNALSÐAC, AY, AA AND AP BODIES
The turn signals are part of the multi-function switch.
Which contains electrical circuitry for turn signal, cor-
nering lamps, hazard warning, headlamp beam select,
headlamp optical horn, windshield wiper, pulse wipe
and windshield washer switching. The integrated switch
assembly is mounted to the left hand side of the steer-
ing column. When the driver wishes to signal his inten-
tions to change direction of travel, he moves the lever
upward to cause the right signals to flash and down-
ward to cause the left signals to flash. After completion
of a turn the system is deactivated automatically. As
the steering wheel returns to the straight ahead posi-
tion, a canceling cam of two lobes molded to the clock-
spring mechanism comes in contact with the cancel
actuator on the turn signal multi-function switch as-
sembly. Either cam lobe, pushing on the cancel actua-
tor, returns the switch to the off position. If only momentary signaling such as indication of a
lane change is desired, the switch is actuated to a left
or right intermediate detent position. In this position
the signal lamps flash as described above, but the
switch returns to the OFF position as soon as the lever
is released.
When the system is activated, 1 of 2 indicator
lamps mounted in the instrument cluster flashes in
unison with the turn signal lamps, indicating to the
driver that the system is operating.
AG AND AJ BODIES
The turn signals are actuated with lever on the left
side of the instrument panel switch pod. When the
driver wishes to signal his intentions to change di- rection of travel, he moves the lever upward to cause
the right signals to flash and downward to cause the
left signals to flash. After completion of a turn the system is deacti-
vated automatically. The cancellation switch in the
steering column sends a signal to a remote turn sig-
nal switch in the switch pod to cancel the turn signal
function. As the steering wheel returns to the
straight ahead position from a turn, a cancel cam
which is located on the steering wheel contacts a
cancel flipper located on the cancellation switch.
When the flipper is contacted by the cancel cam in
the proper rotational direction, the cancel switch
sends a signal to the remote turn signal switch. If only momentary signaling such as indication of a
lane change is desired, the switch is actuated to a
left or right intermediate detent position. In this po-
sition the signal lamps flash as described above, but
the switch returns to the OFF position as soon as the
lever is released. When the system is activated, 1 of 2 indicator
lamps mounted in the instrument cluster flashes in
unison with the turn signal lamps, indicating to the
driver that the system is operating.
HAZARD WARNING SYSTEM
The hazard warning system is actuated by a push
button located on the top of the steering column be-
tween the steering wheel and the instrument panel.
The hazard switch is identified with a double trian-
gle on top of the button. Push and release the button
to turn the hazard function ON or OFF. The button
will move out from the steering column in the ON
position and will remain in toward the column in the
OFF position.
CHIME FUNCTIONÐAC, AG, AJ AND AY
The chime will sound after the vehicle has traveled
a distance of 0.6 miles at a speed above 15 miles per
hour.
Ä TURN SIGNALS AND HAZARD WARNING FLASHER 8J - 1

TESTING PROCEDURES
MULTI-FUNCTION SWITCH TESTS AA, AC, AP, AND AY BODIES
The multi-function switch contains electrical cir-
cuitry for turn signal, cornering lamps (optional),
hazard warning, headlamp beam select, headlamp
optical horn, windshield wiper, pulse wipe, and wind-
shield washer switching. This integrated switch as-
sembly is mounted to the left hand side of the
steering column. Should any function of the switch
fail, the entire switch assembly must be replaced. Re-
fer to Fig. 1 for diagnosis. To test the switch, first disconnect the negative
battery cable, then remove the upper and lower col-
umn covers to gain access to the switch connector.
Remove switch connector. Using an ohmmeter, test
for continuity (no resistance) between the terminals
of the switch as shown in the following continuity
charts (Fig 2 or 3).
DUAL-FUNCTION SWITCH TESTSÐAG AND AJ BODIES
The dual-function switch contains electrical cir-
cuitry for hazard warning switching, and circuitry
and electronics for turn signal cancellation. The
switch assembly is mounted to the left hand side of
the steering column. To test the hazard warning portion of the switch,
first disconnect the negative battery cable, then re-
move the upper and lower steering column covers to
gain access to the switch connector. Remove switch
connector (Fig. 4). Using an ohmmeter, test for con-
tinuity between the terminals of the switch as shown
in the following continuity chart (Fig. 5). To test the cancellation portion of the switch:
(1) Reconnect battery and switch connector (Fig.
5). (2) Connect voltmeter positive lead (+) to pin 8
and negative lead (-) to ground. (3) Place ignition switch to the ON position. Volt-
meter should read battery voltage. If no voltage is
present, check feed wire to pin 8. If battery voltage is
present continue with switch test.
RIGHT CANCELLATION TEST (1) Connect one side of a jumper wire to pin 3 and
the other end of jumper wire to ground. (2) Connect the positive lead (+) of a voltmeter to
pin 5 and the negative lead (-) to ground.
CAUTION: Do not allow pin 5 to become grounded
during test, switch failure will result.
(3) With the ignition switch in the ON position,
push the cancellation pawl down and read the volt-
meter. (4) The voltmeter should show at least 9 volts. (5) If voltage is 0 to 8 volts the cancellation switch
is defective. If voltage is 9 volts or more the cancel-
lation switch is working correctly.
LEFT CANCELLATION TEST
(1) Connect one side of a jumper wire to pin 4 and
the other end of jumper wire to ground. (2) Connect the positive lead (+) of a voltmeter to
pin 5 and the negative lead (-) to ground.
CAUTION: Do not allow pin 5 to become grounded
during test, switch failure will result.
(3) With the ignition switch in the ON position,
push the cancellation pawl up and read the voltme-
ter. (4) The voltmeter should show at least 9 volts.
(5) If voltage is 0 to 8 volts the cancellation switch
is defective. If voltage is 9 volts or more the cancel-
lation switch is working correctly.
REMOTE TURN SIGNAL SWITCH TESTÐAA AND AJ BODIES
The remote turn signal switch is located on the left
side of the instrument panel switch pod. To test, re-
move switch pod assembly from instrument panel.
Using an ohmmeter, test for continuity between the
terminals of the switch as shown in the following
continuity chart (Fig. 6). The white 7 way connector
next to the 14 way connector must be connected
when performing continuity checks.
CANCELLATION SOLENOID TESTÐAG AND AJ BODIES
To test the turn signal cancellation solenoid:
(1) Remove switch pod from instrument panel.
(2) Connect one end of a jumper wire to the posi-
tive terminal of the battery, the other end to pin 6 of
the turn signal switch 14 way connector. (3) Place turn signal switch in the left turn mode.
(4) Take a second jumper wire and connect one end
to a good ground. Momentarily touch the other end of
the jumper wire to pin 11 or 14. The solenoid should
energize, and return the switch to its center OFF po-
sition. (5) Place turn signal switch in the right turn
mode. (6) Repeat step 4. The solenoid should energize,
and return the switch to its center OFF position. (7) If switch does not return to center in either di-
rection, the switch is defective.
MULTI-FUNCTION SWITCHÐAA, AC, AP AND AY
BODIES
REMOVAL
(1) Disconnect negative battery cable.
(2) Tilt column only remove tilt lever.
8J - 2 TURN SIGNALS AND HAZARD WARNING FLASHER Ä

Fig. 1 Turn Signal and Hazard Warning Flasher Diagnosis
Ä TURN SIGNALS AND HAZARD WARNING FLASHER 8J - 3

(3) Remove both upper and lower steering column
shrouds. (4) Remove multi-function switch tamper proof
mounting screws (Fig.7). (5) Gently pull switch away from column. Loosen
connector screw. The screw will remain in the con-
nector. (6) Remove wiring connector from multi-function
switch.
INSTALLATION
(1) Install wiring connector to switch and tighten
connector retaining screw to 2 N Im (17 in. lbs.)
torque. (2) Mount multi-function switch to column and
tighten retaining screws to 2 N Im (17 in. lbs.) torque. (3) Install steering column covers. Tighten retain-
ing screws to 2 N I(17 in. lbs.) torque.
(4) Tilt column only install tilt lever.
(5) Install negative battery cable.
(6) Check all functions of switch for proper opera-
tion.
Fig. 2 Turn Signal and Hazard Switch Continuity
Fig. 3 Beam Select Switch Continuity
Fig. 4 Dual-Function Switch Connector
Fig. 5 Hazard Warning Switch ContinuityÐAJ Body
8J - 4 TURN SIGNALS AND HAZARD WARNING FLASHER Ä

DUAL-FUNCTION SWITCHÐAG AND AJ BODIES
REMOVAL
(1) Disconnect negative battery cable.
(2) Tilt column only remove tilt lever.
(3) Remove three attaching screws, in the upper
and lower steering column covers and remove covers. (4) Remove two tamper proof mounting screws. (5) Gently pull switch away from column. Release
connector lock on the wiring connector, then remove
the connector from the switch (Fig. 8).
INSTALLATION
(1) Install wiring connector to switch. Make sure
that switch locking tab is fully seated in the wiring
connector. (2) Mount switch to column and tighten screws to
2N I(17 in. lbs.) torque.
(3) Install steering column covers and tighten
screws to 2 N I(17 in. lbs.) torque.
(4) Tilt column only install tilt lever.
(5) Re-install negative battery cable.
(6) Check all functions of switch for proper opera-
tion of the hazard warning and turn signal cancella-
tion.
REMOTE TURN SIGNAL SWITCH REMOVALÐAG
AND AJ BODIES
(1) Disconnect battery ground cable..
(2) Remove turn signal lever by pulling it straight
out of the switch (Fig. 9). (3) Remove two screws from the bottom of the
switch pod that hold turn signal switch. (4) Disconnect turn signal pigtail wire from head-
lamp switch at the 8-way connector.
Fig. 6 Remote Turn Signal Switch ContinuityÐAG and AJ Bodies
Fig. 7 Multi-Function SwitchÐAA, AC, AP and AY Bodies
Fig. 8 Dual-Function SwitchÐAG and AJ Bodies
Ä TURN SIGNALS AND HAZARD WARNING FLASHER 8J - 5

(5) For installation reverse above procedure.
(6) Check for proper operation of all components
which are controlled by the pod mounted switch.
TURN SIGNAL AND HAZARD WARNING FLASHER
LOCATION
AA, AC, AP AND AY BODIES
The turn signal flasher and the hazard warning
flasher are two separate plug-in type units. On AC and AY both flashers are on the relay mod-
ule (Fig. 10).
On AA and AP Bodies the hazard flasher is located
on the relay module (Fig. 11). The turn signal flasher
is on the driver's side of A/C duct for AA Body (Fig.
12) and center A/C duct for AP Body.
AG AND AJ BODIES
The turn signal flasher and the hazard warning
flasher are combined into one unit called a combina-
tion flasher (combo-flasher). The combo-flasher con-
trols the flashing of the hazard warning system and the turn signal system. An inoperative bulb or in-
complete turn signal circuit will result in an increase
in flasher speed. The combo-flasher is located under the instrument
panel, right of the steering column and is clipped on
the A/C distribution duct. The combo-flasher is yel-
low in color for ease of identification.TURN SIGNAL RELAYSÐAG AND AJ BODIES
The AG and AJ models are equipped with four
turn signal relays.
Fig. 9 Remote Turn Signal SwitchÐAG and AJ Bodies
Fig. 10 Turn Signal and Hazard WarningFlasherÐAC and AY Bodies
Fig. 11 Hazard Warning FlasherÐAA and AP Bodies
Fig. 12 Turn Signal FlasherÐAA Body
8J - 6 TURN SIGNALS AND HAZARD WARNING FLASHER Ä

One relay controls the right rear turn signal and
stop lamp. The second relay controls the left rear
turn signal and stop lamp. The third relay controls
the right front turn signal. The fourth relay controls
the left front turn signal. The turn signal relays are located in the relay
bank, underneath the driver's side of the instrument
panel. The four turn signal relays are identical and
can be interchanged. The turn signal relays do not cycle on and off with
the turn signal lamp. Their function is to complete the turn signal circuit when the turn signal is
switched on. Turn signal cycling is done by the com-
bination flasher. To test the relay, remove the suspect relay and
switch it with 1 of the other 3 turn signal relays. If
the problem follows the relay, replace that relay. If
the problem remains in the same circuit, the relay is
not the problem. Refer to Group 8W, Wiring Dia-
grams.
Ä TURN SIGNALS AND HAZARD WARNING FLASHER 8J - 7