CHARGING SYSTEM RESISTANCE TESTS
These tests will show the amount of voltage drop
across the generator output wire from the generator
output (B+) terminal to the battery positive post.
They will also show the amount of voltage drop from
the ground (-) terminal on the generator or case
ground (Fig. 1) to the battery negative post.
A voltmeter with a 0±18 volt DC scale should be
used for these tests. By repositioning the voltmeter
test leads, the point of high resistance (voltage drop)
can easily be found.
PREPARATION
(1) Before starting test, make sure battery is in
good condition and is fully-charged. See Group 8A,
Battery for more information.
(2) Check condition of battery cables at battery.
Clean if necessary.
(3) Start the engine and allow it to reach normal
operating temperature.
(4) Shut engine off.
(5) Connect an engine tachometer.
(6) Fully engage the parking brake.
TEST
(1) Start engine.
(2) Place heater blower in high position.
(3) Turn on headlamps and place in high-beam
position.
(4) Turn rear window defogger on.
(5) Bring engine speed up to 2400 rpm and hold.
(6) Testing (+ positive) circuitry:
(a) Touch the negative lead of voltmeter directly
to battery positivePOST(Fig. 2).
(b) Touch the positive lead of voltmeter to the
B+ output terminal stud on the generator (not the
terminal mounting nut). Voltage should be no
higher than 0.6 volts. If voltage is higher than 0.6
volts, touch test lead to terminal mounting stud
nut and then to the wiring connector. If voltage is
now below 0.6 volts, look for dirty, loose or poor
connection at this point. Also check condition of the
generator output wire-to-battery bullet connector.
Refer to Group 8, Wiring for connector location. A
voltage drop test may be performed at each (-
ground) connection in this circuit to locate the
excessive resistance.
(7) Testing (- ground) circuitry:
(a) Touch the positive lead of voltmeter directly
to battery negativePOST.
(b) Touch the negative lead of voltmeter to the
generator case. Voltage should be no higher than
0.3 volts. If voltage is higher than 0.3 volts, touch
test lead to generator case and then to the engine
block. If voltage is now below 0.3 volts, look for
dirty, loose or poor connection at this point. A volt-
age drop test may be performed at each connectionin this circuit to locate the excessive resistance.
This test can also be performed between the gener-
ator case and the engine. If test voltage is higher
than 0.3 volts, check for corrosion at generator
mounting points or loose generator mounting.
CURRENT OUTPUT TEST
The current output test will determine if the
charging system can deliver its minimum test cur-
rent (amperage) output. Refer to the Specifications
section at the end of this group for minimum test
current (amperage) requirements.
The first part of this test will determine the com-
bined amperage output of both the generator and the
Electronic Voltage Regulator (EVR) circuitry.
PREPARATION
(1) Determine if any Diagnostic Trouble Codes
(DTC) exist. To determine a DTC, refer to On-Board
Diagnostics in this group. For repair, refer to the
appropriate Powertrain Diagnostic Procedures man-
ual.
(2) Before starting test, make sure battery is in
good condition and is fully-charged. See Group 8A,
Battery for more information.
(3) Check condition of battery cables at battery.
Clean if necessary.
(4) Perform the Voltage Drop Test. This will
ensure clean and tight generator/battery electrical
connections.
(5) Be sure the generator drive belt is properly
tensioned. Refer to Group 7, Cooling System for
information.
(6) A volt/amp tester equipped with both a battery
load control (carbon pile rheostat) and an inductive-
type pickup clamp (ammeter probe) will be used for
this test. Refer to operating instructions supplied
with tester. When using a tester equipped with an
inductive-type clamp, removal of wiring at the gener-
ator will not be necessary.
(7) Start the engine and allow it to reach operating
temperature.
(8) Shut engine off.
(9) Turn off all electrical accessories and all vehicle
lighting.
(10) Connect the volt/amp tester leads to the bat-
tery. Be sure the carbon pile rheostat control is in the
OPEN or OFF position before connecting leads. See
Load Test in Group 8A, Battery for more information.
Also refer to the operating instructions supplied with
test equipment.
(11) Connect the inductive clamp (ammeter probe).
Refer to the operating instructions supplied with test
equipment.
(12) If volt/amp tester is not equipped with an
engine tachometer, connect a separate tachometer to
the engine.
8C - 4 CHARGING SYSTEMNS
DIAGNOSIS AND TESTING (Continued)
The instrument cluster is equipped with the follow-
ing warning lamps.
²Lift Gate Ajar
²Low Fuel Level
²Low Windshield Washer Fluid Level
²Cruise
²Battery Voltage
²Fasten Seat Belt
²Door Ajar
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
NS vehicle instrument clusters are equipped with a
self diagnostic test feature to help identify electronic
problems. Prior to any test, perform Self Diagnostic
Test. The self diagnostic system monitors the CCD
bus messages. If an electronic problem occurs, a
Diagnostic Trouble Code (DTC) will be displayed in
the odometer window of the cluster.
The following CCD bus messages are continuously
monitored by the diagnostic system:
²Body Control Module
²Powertrain Control Module
²Transmission Control Module, if equipped
HEADLAMP SWITCH
Using a Digital Multimeter, equipped with a diode
test to perform the Headlamp Switch Test below (Fig.
1).
Switch position possibilities are open (no continu-
ity), continuity, resistance value in ohms, or diode
test. Use the values in the third column to determine
meter setting. If Headlamp Switch is not within spec-
ifications replace as necessary.
The Chrysler Town and Country is available with
optional Automatic Headlamps. For diagnosis, refer
to the proper Body Diagnostic Procedures Manual.
SELF DIAGNOSTIC TEST
To activate self diagnostic program:
(1) With the ignition switch in the OFF position,
depress the TRIP and RESET buttons.
(2) While holding the TRIP and RESET button
turn the ignition switch to the ON position.
(3) Continue to hold the TRIP and RESET buttons
until the word CODE appears in the odometer win-
dows (about five seconds) then release the buttons. If
a problem exists, the system will display Diagnostic
Trouble Codes (DTC's). If no problem exists, the code
999 (End Test) will momentarily appear.
DIM TEST
When CHEC-0 is displayed in the odometer win-
dow, the cluster's vacuum fluorescent (VF) displayswill dim down. If the VF display brightness does no
change, a problem exists in the cluster.
Fig. 1 Headlamp Switch Test
8E - 2 INSTRUMENT PANEL AND SYSTEMSNS
DESCRIPTION AND OPERATION (Continued)
INSTRUMENT CLUSTER
The mechanical instrument cluster with a tachom-
eter is equipped with a electronic vacuum fluorescent
odometer, and trip odometer display.
The instrument cluster is equipped with the follow-
ing warning lamps (Fig. 2).
²Battery Voltage
²Lift Gate Ajar²Low Coolant
²Low Windshield Washer Fluid Level
²Door Ajar
²Glow Plug Indicator
²Low Fuel Level
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
GS vehicle instrument clusters are equipped with a
self diagnostic test feature to help identify electronic
problems. Prior to any test, perform Self Diagnostic
Test. The self diagnostic system monitors the CCD
bus messages. If an electronic problem occurs, a
Diagnostic Trouble Code (DTC) will be displayed in
the odometer window of the cluster.
The following CCD bus messages are continuously
monitored by the diagnostic system:
²Body Control Module
²Powertrain Control Module
HEADLAMP SWITCH
Using a Digital Multimeter, equipped with a diode
test to perform the Headlamp Switch Test below (Fig.
3).
Switch position possibilities are open (no continu-
ity), continuity, resistance value in ohms, or diode
test. Use the values in the third column to determine
meter setting. If Headlamp Switch is not within spec-
ifications replace as necessary.
Fig. 2 Instrument Cluster
Fig. 1 Headlamp and Mirror Switch Lamps
8E - 2 INSTRUMENT PANEL AND SYSTEMSNS/GS
DESCRIPTION AND OPERATION (Continued)
COMBINATION FLASHER WITH / WITHOUT
DAYTIME RUNNING LAMPS MODULEÐCIRCUIT
DIAGNOSTICS
The battery input (Pin 1), is brought into the Junction
Block through the Electrical Distribution Wiring (EDW)
harness (Fig. 4). It originates under the hood in thePower Distribution Center (PDC) through a 20 ampere
fuse at position 10 (9th position from the upper end) and
labeled HAZARD. This circuit (L09) is the only power
feed to the combination-flasher/DRL.
The ignition input of Pin 6 (refer to Junction Block
Terminal Call-Out and Junction Block Terminal Call-Out
with DRL tables) only senses that the ignition circuit is
ON and does not supply current to the module in a way
that would power the system. This RUN/START circuit is
brought into the junction block to a 10 ampere fuse
labeled TS BU LMP at the bottom right side. The circuit
designation out of the fuse is A22D. This circuit feeds the
combo-flasher and the following systems with Ignition
voltage if the vehicle is so equipped:
²Back-Up Lamps
²Electrochromic Inside Rear view Mirror
²A/C Control Head
²Mini-Trip Computer
²ABS Module
²Front Blower Relay Coil
²Rear Blower Relay Coil
²AWD Solenoids
²Rear Window Defogger (EBL) Relay Coil
The ignition input to the combo-flasher will draw
typically 5 mA of current while active.
For diagnostic test procedures, refer to Combina-
tion Flasher Diagnosis tables.
Fig. 4 Electronic Combination Flasher Circuit
Fig. 3 Turn Signal±Multi-Function Switch Pin
numbers
TURN SIGNAL MULTI-FUNCTION SWITCH
TEST
SWITCH POSITIONCONTINUITY
BETWEEN
LEFT 4 AND 8
RIGHT 3 AND 8
HAZARD 1 AND 8
LO BEAM 9 AND 10
HI BEAM 9 AND 121
NSTURN SIGNAL AND FLASHERS 8J - 3
DIAGNOSIS AND TESTING (Continued)
ule (BCM). If a problem occurs in the electronic com-
ponents, wiring, switch (except integral motor park
switch) and wiper motor a Diagnostic Trouble Code
(DTC) will be stored in the BCM memory. DTC's can
be retrieved using a scan tool (DRB). Refer to proper
Body Diagnostic Procedures manual for DTC descrip-
tions and retrieval information.
The windshield wiper park switch and circuit is
monitored by the BCM. The park switch and circuit
can be tested using the Wiper System Diagnosis
chart.
FAILED PARK SWITCH
If the wiper park switch has failed the windshield
wipers will operate as follows:SWITCH OFFÐWipers stop in current location
regardless of the park signal.
INTERMITTENT MODEÐWipers operate at low
speed for one or more extra wipes or continuously.
LOW SPEEDÐWipers operate at low speed.
HIGH SPEEDÐWipers operate at high speed.
PULSE WIPEÐWipers will not operate.
WIPE AFTER WASHÐWipers operate at low
speed in any mode setting. Wipers operate only while
wash button is depressed with switch in OFF mode,
wipers stop in mid-cycle when button is released.
The windshield wiper park switch and circuit is
monitored by the BCM. The park switch and circuit
can be tested using the Wiper System Diagnosis
table.
WIPER SYSTEM DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
WIPER BLADES DO NOT PARK
PROPERLY1. WIPER ARMS IMPROPERLY
PARKED.
2. WIPER ARMS ARE LOOSE ON
PIVOT SHAFT.
3. MOTOR CRANK LOOSE AT
OUTPUT SHAFT.1. REMOVE WIPER ARMS AND
REPARK. REFER TO WIPER ARM
REMOVAL AND INSTALLATION.
2. REMOVE WIPER ARM AND
REPARK. REFER TO WIPER ARM
REMOVAL AND INSTALLATION.
3. REMOVE WIPER ARM, RUN
WIPER MOTOR TO PARK
POSITION AND REMOVE THE
MODULE. WITHOUT ROTATING
THE MOTOR OUTPUT SHAFT,
REMOVE THE CRANK AND CLEAN
ANY FOREIGN MATTER FROM
THE MOTOR SHAFT. INSTALL THE
MOTOR CRANK IN ITS ORIGINAL
POSITION.
MOTOR STOPS IN ANY
POSITION WHEN THE SWITCH
IS TURNED OFF1. OPEN PARK CIRCUIT. 1. CHECK PARK SWITCH BY
DISCONNECTING THE WIRE
CONNECTOR AND APPLY
BATTERY VOLTAGE TO PIN 4.
PLACE A JUMPER WIRE FROM
PIN 2 TO PIN 3 AND THEN TO AN
EXTERNAL GROUND. REPLACE
MOTOR IF IT DOES NOT PARK.
MOTOR WILL NOT STOP WHEN
THE SWITCH IS TURNED OFF1. FAULTY SWITCH.
2. LOCK OF DYNAMIC BRAKE ON
WET GLASS.1. CHECK SWITCH IN LOW, HIGH
AND INTERMITTENT POSITION.
2. ENSURE PARK SWITCH HAS
CLEAN GROUND.
WIPER BLADES SLAP AGAINST
COWL SCREEN OR WINDOW
MOLDINGS.1. WIPER ARMS ARE PARKED
INCORRECTLY.1. PARK WIPER ARMS. REFER TO
WIPER ARM ADJUSTMENT.
8K - 2 WINDSHIELD WIPERS AND WASHERSNS
DIAGNOSIS AND TESTING (Continued)
MULTI-FUNCTION SWITCH
To test the windshield wiper and washer portion of
the multi-function switch:
(1) Remove the multi-function switch, refer to
removal procedures.
(2) Using an ohmmeter check continuity reading
between switch pins, refer to (Fig. 1) for proper pin
numbers.
REMOVAL AND INSTALLATION
MULTI-FUNCTION SWITCH
WARNING: BEFORE SERVICING A STEERING COL-
UMN EQUIPPED WITH AN AIRBAG REFER TO
GROUP 8M, RESTRAINT SYSTEMS FOR PROPER
AND SAFE SERVICE PROCEDURES.
REMOVAL
(1) Release hood latch and open hood.
(2) Disconnect and isolate battery negative cable.
(3) Remove upper and lower steering column
shrouds, refer to Group 19, Steering for proper pro-
cedures.
(4) Disconnect wire connector from back of turn
signal multi-function switch (Fig. 2).
(5) Remove screws holding turn signal switch to
steering column adapter collar.
(6) Remove turn signal switch.
INSTALLATION
For installation, reverse the above procedures. Ver-
ify switch operation by placing the control stalk ineither the right or left position and turning the steer-
ing wheel to ensure the automatic cancellation of the
switch.
WINDSHIELD WASHER BOTTLE
REMOVAL
(1) Hoist and support vehicle on safety stands.
(2) Remove right front wheel, refer to Group 22,
Wheels and Tires for proper procedures and tighten-
ing sequences.
(3) Remove front wheelhouse splash shield.
(4) Disconnect wire connectors from the windshield
and rear window washer pumps (Fig. 3).
(5) If washer bottle has fluid in it place a suitable
drain pan under the hose connections.
Fig. 1 Windshield Wiper and Washer±Multi-Function
Switch Test
Fig. 2 Turn Signal Multi-Function Switch
Fig. 3 Windshield Washer Bottle
8K - 4 WINDSHIELD WIPERS AND WASHERSNS
DIAGNOSIS AND TESTING (Continued)
REAR WIPER AND WASHER
INDEX
page page
DESCRIPTION AND OPERATION
INTRODUCTION......................... 9
REAR WINDOW WIPER/WASHER SWITCHES . . . 9
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES................ 9
REMOVAL AND INSTALLATION
REAR GLASS RUBBER GROMMET........... 9REAR WINDOW WIPER MOTOR............ 10
REAR WIPER ARM...................... 10
REAR WIPER BLADE ELEMENT............ 10
REAR WIPER BLADE..................... 10
DESCRIPTION AND OPERATION
INTRODUCTION
When continuous rear wiper operation is required,
the Body Control Module (BCM) will provide ignition
ON voltage to the rear wiper motor. When the wiper
switch is turned OFF, the BCM provides circuit
ground to operate the motor until the wipe cycle is
complete and the wiper arm returns to the base of
the rear window.
When intermittent rear wiper mode is selected, the
wiper motor will cycle every 7 seconds. The intermit-
tent delay time is also adjusted based upon vehicle
speed. With the vehicle traveling greater at 50 mph,
the cycle changes to every 5 seconds.
REAR WINDOW WIPER/WASHER SWITCHES
The rear window wiper/washer switches are incor-
porated into the HVAC switch panel. Refer to Group
8E, Instrument Panel for proper service procedures.
DIAGNOSIS AND TESTING
DIAGNOSTIC PROCEDURES
The rear window wiper system operates in several
modes:
²Continuous wipe
²Intermittent wipe
²Wash
²Wipe after wash
The windshield wiper circuits are continuously
monitored and controlled by the Body Control Mod-
ule (BCM). If a problem occurs in the electronic com-
ponents, wiring, switch (except integral motor park
switch) and wiper motor a Diagnostic Trouble Code
(DTC) will be stored in the BCM memory. The
DTC(s) can be retrieved using a scan tool (DRB).
Refer to proper Body Diagnostic Procedures manual
for DTC descriptions and retrieval information.
REMOVAL AND INSTALLATION
REAR GLASS RUBBER GROMMET
REMOVAL
(1) Remove rear window wiper motor.
(2) Peel wiper pivot seal grommet from rear glass.
(3) Remove grommets from vehicle (Fig. 1).
INSTALLATION
For installation, reverse the above procedure.
Fig. 1 Rear Glass Rubber Grommet
Fig. 2 Rear Glass Rubber Grommets
NSWINDSHIELD WIPERS AND WASHERS 8K - 9
REAR WINDOW WIPER MOTOR
REMOVAL
(1) Remove rear wiper arm.
(2) Open liftgate.
(3) Remove liftgate trim panel.
(4) Disconnect wire connector from rear wiper
motor.
(5) Remove screws holding rear wiper motor to lift-
gate (Fig. 3).
(6) Remove wiper motor from liftgate.
INSTALLATION
For installation, reverse the above procedure.
REAR WIPER ARM
REMOVAL
(1) Lift and hold wiper blade away from rear win-
dow.
(2) Lift lock holding wiper arm to wiper pivot
upward.
(3) Allow wiper arm to rest against lock.
(4) Pull wiper from pivot (Fig. 4).
INSTALLATION
For installation, reverse the above procedure.
REAR WIPER BLADE
REMOVAL
(1) Lift wiper blade away from rear window.
(2) Release latch holding blade to wiper arm (Fig.
5).
(3) Remove blade from wiper arm.
INSTALLATION
For installation, reverse the above procedure.
REAR WIPER BLADE ELEMENT
Refer to Windshield Wiper Blade Element in this
section.
Fig. 3 Rear Window Wiper Motor
Fig. 4 Rear Wiper Arm
Fig. 5 Rear Wiper Arm
8K - 10 WINDSHIELD WIPERS AND WASHERSNS
REMOVAL AND INSTALLATION (Continued)