CONDITION POSSIBLE CAUSES CORRECTION
WIPER MOTOR WILL NOT
RUN1. BLOWN FUSE. 1. REPLACE FUSE, AND RUN SYSTEM.
2. NEW FUSE BLOWS. 2. CHECK FOR SHORT IN WIRING OR
SWITCH.
3. NEW FUSE BLOWS. 3. REPLACE FUSE, REMOVE MOTOR
CONNECTOR, TURN SWITCH ON, FUSE
DOES NOT BLOW, REPLACE MOTOR.
4. NO VOLTAGE AT MOTOR. 4. CHECK SWITCH AND WIRING
HARNESS. REFER TO WIRING
DIAGRAMS.
5. POOR GROUND. 5. REPAIR GROUND WIRE CONNECTION
AS NECESSARY.
DIAGNOSIS AND TESTING - REAR WIPER
SYSTEM
The rear window wiper system operates in several
modes:
²Continuous wipe (Export and ATC equipped
vehicles only)
²Intermittent wipe
²Wash²Wipe 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 DRB IIItscan tool.
DIAGNOSIS AND TESTING - WASHER SYSTEM
WASHER SYSTEM DIAGNOSIS
CONDITION POSSIBLE CAUSES CORRECTION
WASHER MOTOR 1. IPM FUSE #33 BLOWN OR
DEFECTIVE.1. CHECK FUSE #33 IN THE IPM. REPLACE
IF NOT OK.
2. IPM FUSE #33 LOOSE. 2. PROPERLY INSTALL IPM FUSE #33 IN
SOCKET.
BLOWN FUSE WHEN
IGNITION SWITCH IS IN THE
RUN OR ACCESSORY
POSITION.1. SHORT IN IPM BETWEEN
FUSE #33 AND PIN 11 OR PIN 1.1. REFER TO IPM DIAGNOSTIC
PROCEDURES IN WIRING DIAGRAMS.
2. SHORT IN MOTOR POWER
CIRCUIT.2. SHORT OR DEFECTIVE CIRCUIT
BETWEEN IPM PIN 11 AND WASHER MOTOR
CONNECTOR POSITIVE TERMINAL 2. IF NOT
OK, REPAIR CIRCUIT.
3. SHORT IN WASHER PUMP
MOTOR.3. REPLACE WASHER PUMP MOTOR.
WASHER MOTOR RUNS
WHEN IGNITION SWITCH IN
RUN OR ACCESSORY
POSITION.1. SHORT IN IPM BETWEEN
WASHER PUMP MOTOR LSD
AND PIN 20.1. REFER TO IPM DIAGNOSTIC
PROCEDURES IN WIRING DIAGRAMS.
2. DEFECTIVE FRONT WASHER
LSD IN IPM.2. REFER TO IPM DIAGNOSTIC
PROCEDURES IN WIRING DIAGRAMS.
3. SHORT IN MOTOR GROUND
CIRCUIT.3. SHORT OR DEFECTIVE CIRCUIT
BETWEEN IPM PIN 20 AND MOTOR
CONNECTOR NEGATIVE TERMINAL 1. IF
NOT OK, REPAIR CIRCUIT.
8R - 4 WIPERS/WASHERSRS
WIPERS/WASHERS (Continued)
CONDITION POSSIBLE CAUSES CORRECTION
WASHER SYSTEM WILL NOT
FLOW WASHER FLUID.1. NO WASHER FLUID IN
RESERVOIR.1. FILL WASHER RESERVOIR.
2. IPM FUSE #33 BLOWN. 2. SHORT OR DEFECTIVE CIRCUIT
BETWEEN IPM PIN 11 AND WASHER PUMP
MOTOR CONNECTOR POSITIVE TERMINAL
2. INTERNAL SHORT IN IPM. IF NOT OK,
REPAIR CIRCUIT OR REFER TO IPM
DIAGNOSTIC PROCEDURES IN WIRING
DIAGRAMS.
3. WASHER HOSE NOT
FLOWING WASHER FLUID.3. ASSURE WASHER HOSE IS NOT
PINCHED, LOOSE, BROKEN OR
DISCONNECTED. IF NOT OK, PROPERLY
ROUTE OR REPAIR WASHER HOSE.
4. MOTOR CONNECTOR LOOSE. 4. PROPERLY SEAT AND LOCK CONNECTOR
TO MOTOR.
5. MOTOR CONNECTOR
TERMINALS BENT.5. REPAIR TERMINALS AND PROPERLY
SEAT CONNECTOR TO MOTOR.
6. OPEN CIRCUIT TO OR FROM
WASHER SELECT SWITCH
(EXPORT AND ATC EQUIPPED
VEHICLES ONLY).6. OPEN OR DEFECTIVE CIRCUIT BETWEEN
IPM BODY CONTROLLER PIN 27 AND
WASHER SELECT SWITCH PIN 4, OR OPEN
OR DEFECTIVE CIRCUIT BETWEEN IPM
BODY CONTROLLER PIN 22 AND WASHER
SELECT SWITCH PIN 2. IF NOT OK, REPAIR
CIRCUIT.
7. OPEN OR DEFECTIVE
WASHER SELECT SWITCH.7. REFERO TO THE PROPER BODY
DIAGNOSTIC PROCEDURES INFORMATION
ON MANUAL TEMPERATURE CONTROLS.
8. OPEN POWER CIRCUIT TO
MOTOR.8. OPEN OR DEFECTIVE CIRCUIT BETWEEN
IPM CONNECTOR TERMINAL 11 AND
WASHER MOTOR CONNECTOR POSITIVE
TERMINAL 2. INTERNAL OPEN IN IPM. IF
NOT OK, REPAIR CIRCUIT OR REFER TO
IPM DIAGNOSTIC PROCEDURES IN WIRING
DIAGRAMS.
9. OPEN OR DEFECTIVE MOTOR
GROUND CIRCUIT.9. OPEN OR DEFECTIVE CIRCUIT BETWEEN
IPM CONNECTOR TERMINAL 20 AND
WASHER MOTOR CONNECTOR NEGATIVE
TERMINAL 1. INTERNAL OPEN IN IPM. IF
NOT OK, REPAIR CIRCUIT OR REFER TO
IPM DIAGNOSTIC PROCEDURES IN WIRING
DIAGRAMS.
10. OPEN CIRCUIT IN MOTOR. 10. CHECK FOR OPEN CIRCUIT IN MOTOR
BETWEEN POSITIVE TERMINAL 2 AND
NEGATIVE TERMINAL 1. IF NOT OK,
REPLACE WASHER MOTOR.
11. SEIZED MOTOR BEARINGS. 11. APPLY DIRECT BATTERY VOLTAGE TO
MOTOR TERMINALS. IF MOTOR DOES NOT
RUN, REPLACE MOTOR.
12. NO BUS MESSAGE FROM
MTC CONTROL (MANUAL TEMP.
CONTROL ONLY).12. CHECK FOR CORRECT PCI BUS
MESSAGE WITH DRBIIIT.
RSWIPERS/WASHERS8R-5
WIPERS/WASHERS (Continued)
WIRING
TABLE OF CONTENTS
page page
WIRING DIAGRAM INFORMATION....... 8W-01-1
COMPONENT INDEX.................. 8W-02-1
POWER DISTRIBUTION............... 8W-10-1
GROUND DISTRIBUTION.............. 8W-15-1
BUS COMMUNICATIONS.............. 8W-18-1
CHARGING SYSTEM.................. 8W-20-1
STARTING SYSTEM.................. 8W-21-1
FUEL/IGNITION SYSTEM.............. 8W-30-1
TRANSMISSION CONTROL SYSTEM..... 8W-31-1
VEHICLE SPEED CONTROL............ 8W-33-1
ANTILOCK BRAKES................... 8W-35-1
VEHICLE THEFT SECURITY SYSTEM..... 8W-39-1
INSTRUMENT CLUSTER............... 8W-40-1
HORN/CIGAR LIGHTER/POWER OUTLET . . 8W-41-1
AIR CONDITIONING-HEATER........... 8W-42-1
AIRBAG SYSTEM.................... 8W-43-1
INTERIOR LIGHTING.................. 8W-44-1
BODY CONTROL MODULE............. 8W-45-1
MESSAGE CENTER................... 8W-46-1AUDIO SYSTEM..................... 8W-47-1
REAR WINDOW DEFOGGER............ 8W-48-1
OVERHEAD CONSOLE................. 8W-49-1
FRONT LIGHTING.................... 8W-50-1
REAR LIGHTING..................... 8W-51-1
TURN SIGNALS...................... 8W-52-1
WIPERS............................ 8W-53-1
TRAILER TOW....................... 8W-54-1
POWER WINDOWS................... 8W-60-1
POWER DOOR LOCKS................ 8W-61-1
POWER MIRRORS................... 8W-62-1
POWER SEATS...................... 8W-63-1
POWER SUNROOF................... 8W-64-1
SPLICE INFORMATION................ 8W-70-1
CONNECTOR PIN-OUTS............... 8W-80-1
CONNECTOR/GROUND/SPLICE
LOCATION........................ 8W-91-1
POWER DISTRIBUTION SYSTEM........ 8W-97-1 RSWIRING
8W-1
DESCRIPTION - CIRCUIT FUNCTIONS
All circuits in the diagrams use an alpha/numeric
code to identify the wire and it's function. To identify
which circuit code applies to a system, refer to the
Circuit Identification Code Chart. This chart shows
the main circuits only and does not show the second-
ary codes that may apply to some models.
CIRCUIT IDENTIFICATION CODE CHART
CIRCUIT FUNCTION
A BATTERY FEED
B BRAKE CONTROLS
C CLIMATE CONTROLS
D DIAGNOSTIC CIRCUITS
E DIMMING ILLUMINATION
CIRCUITS
F FUSED CIRCUITS
G MONITORING CIRCUITS
(GAUGES)
H OPEN
I NOT USED
J OPEN
K POWERTRAIN CONTROL
MODULE
L EXTERIOR LIGHTING
M INTERIOR LIGHTING
N NOT USED
O NOT USED
P POWER OPTION (BATTERY
FEED)
Q POWER OPTIONS (IGNITION
FEED)
R PASSIVE RESTRAINT
S SUSPENSION/STEERING
T TRANSMISSION/TRANSAXLE/
TRANSFER CASE
U OPEN
V SPEED CONTROL, WIPER/
WASHER
W OPEN
X AUDIO SYSTEMS
Y OPEN
Z GROUNDS
DESCRIPTION - SECTION IDENTIFICATION AND
INFORMATION
The wiring diagrams are grouped into individual
sections. If a component is most likely found in a par-
ticular group, it will be shown complete (all wires,
connectors, and pins) within that group. For exam-
ple, the Auto Shutdown Relay is most likely to be
found in Group 30, so it is shown there complete. It
can, however, be shown partially in another group if
it contains some associated wiring.
Splice diagrams in Section 8W-70 show the entire
splice and provide references to other sections the
splices serves. Section 8W-70 only contains splice dia-
grams that are not shown in their entirety some-
where else in the wiring diagrams.
Section 8W-80 shows each connector and the cir-
cuits involved with that connector. The connectors
are identified using the name/number on the dia-
gram pages.
WIRING SECTION CHART
GROUP TOPIC
8W-01 thru
8W-09General information and Diagram
Overview
8W-10 thru
8W-19Main Sources of Power and
Vehicle Grounding
8W-20 thru
8W-29Starting and Charging
8W-30 thru
8W-39Powertrain/Drivetrain Systems
8W-40 thru
8W-49Body Electrical items and A/C
8W-50 thru
8W-59Exterior Lighting, Wipers and
Trailer Tow
8W-60 thru
8W-69Power Accessories
8W-70 Splice Information
8W-80 Connector Pin Outs
8W-91 Connector, Ground and Splice
Locations
8W - 01 - 6 8W-01 WIRING DIAGRAM INFORMATIONRS
WIRING DIAGRAM INFORMATION (Continued)
²Ohmmeter - Used to check the resistance
between two points of a circuit. Low or no resistance
in a circuit means good continuity.
CAUTION: Most of the electrical components used
in today's vehicles are Solid State. When checking
resistance in these circuits use a meter with a 10 -
megohm or greater impedance rating. In addition,
make sure the power is disconnected from the cir-
cuit. Circuits that are powered up by the vehicle's
electrical system can cause damage to the equip-
ment and provide false readings.
²Probing Tools - These tools are used for probing
terminals in connectors (Fig. 5). Select the proper
size tool from Special Tool Package 6807, and insert
it into the terminal being tested. Use the other end
of the tool to insert the meter probe.
INTERMITTENT AND POOR CONNECTIONS
Most intermittent electrical problems are caused
by faulty electrical connections or wiring. It is also
possible for a sticking component or relay to cause a
problem. Before condemning a component or wiring
assembly, check the following items.
²Connectors are fully seated
²Spread terminals, or terminal push out
²Terminals in the wiring assembly are fully
seated into the connector/component and locked into
position
²
Dirt or corrosion on the terminals. Any amount of
corrosion or dirt could cause an intermittent problem
²Damaged connector/component casing exposing
the item to dirt or moisture
²Wire insulation that has rubbed through causing
a short to ground
²Some or all of the wiring strands broken inside
of the insulation
²Wiring broken inside of the insulation
TROUBLESHOOTING WIRING PROBLEMS
When troubleshooting wiring problems there are
six steps which can aid in the procedure. The steps
are listed and explained below. Always check for non-factory items added to the vehicle before doing any
diagnosis. If the vehicle is equipped with these items,
disconnect them to verify these add-on items are not
the cause of the problem.
(1) Verify the problem.
(2) Verify any related symptoms. Do this by per-
forming operational checks on components that are
in the same circuit. Refer to the wiring diagrams.
(3) Analyze the symptoms. Use the wiring dia-
grams to determine what the circuit is doing, where
the problem most likely is occurring and where the
diagnosis will continue.
(4) Isolate the problem area.
(5) Repair the problem area.
(6) Verify the proper operation. For this step,
check for proper operation of all items on the
repaired circuit. Refer to the wiring diagrams.
STANDARD PROCEDURE
STANDARD PROCEDURE - ELECTROSTATIC
DISCHARGE (ESD) SENSITIVE DEVICES
All ESD sensitive components are solid state and a
symbol (Fig. 6) is used to indicate this. When han-
dling any component with this symbol, comply with
the following procedures to reduce the possibility of
electrostatic charge build up on the body and inad-
vertent discharge into the component. If it is not
known whether the part is ESD sensitive, assume
that it is.
(1) Always touch a known good ground before han-
dling the part. This should be repeated while han-
dling the part and more frequently after sliding
across a seat, sitting down from a standing position,
or walking a distance.
(2) Avoid touching electrical terminals of the part,
unless instructed to do so by a written procedure.
(3) When using a voltmeter, be sure to connect the
ground lead first.
(4) Do not remove the part form it's protective
packing until it is time to install the part.
(5) Before removing the part from it's pakage,
ground the pakage to a known good ground on the
vehicle.
Fig. 5 PROBING TOOL
1 - SPECIAL TOOL 6801
2 - PROBING END
Fig. 6 ELECTROSTATIC DISCHARGE SYMBOL
8W - 01 - 8 8W-01 WIRING DIAGRAM INFORMATIONRS
WIRING DIAGRAM INFORMATION (Continued)
8W-20 CHARGING SYSTEM
Component Page
Auto Shut Down Relay................ 8W-20-2
Battery.......................... 8W-20-2, 4
Battery Temperature Sensor......... 8W-20-2, 4
Ecm/Pcm Relay..................... 8W-20-4
Engine Control Module................ 8W-20-4
Fuse 16.......................... 8W-20-2, 4
Fuse 17............................ 8W-20-2Component Page
Fuselink......................... 8W-20-2, 4
G100............................ 8W-20-2, 4
G101.......................... 8W-20-2, 3, 4
Generator...................... 8W-20-2, 3, 4
Integrated Power Module............ 8W-20-2, 4
Powertrain Control Module.......... 8W-20-2, 3
Starter Motor..................... 8W-20-2, 4
RS8W-20 CHARGING SYSTEM8W-20-1
8W-21 STARTING SYSTEM
Component Page
Battery.......................... 8W-21-2, 3
Clutch Pedal Interlock Switch........ 8W-21-2, 3
Engine Control Module................ 8W-21-3
Front Control Module................. 8W-21-2
Fuse 9.......................... 8W-21-2, 3
Fuselink......................... 8W-21-2, 3
G101............................ 8W-21-2, 3Component Page
G300.............................. 8W-21-2
Generator........................ 8W-21-2, 3
Ignition Switch.................... 8W-21-2, 3
Integrated Power Module............ 8W-21-2, 3
Powertrain Control Module............ 8W-21-2
Starter Motor..................... 8W-21-2, 3
Starter Motor Relay................ 8W-21-2, 3
RS8W-21 STARTING SYSTEM8W-21-1
8W-30 FUEL/IGNITION SYSTEM
Component Page
A/C Compressor Clutch.............. 8W-30-24
A/C Compressor Clutch Relay........ 8W-30-4, 24
A/C Pressure Sensor........... 8W-30-14, 19, 31
Accelerator Pedal Position Sensor...... 8W-30-38
Adjustable Pedals Module............ 8W-30-23
Adjustable Pedals Motor.............. 8W-30-23
Adjustable Pedals Relay.............. 8W-30-22
Adjustable Pedals Sensor............. 8W-30-23
Adjustable Pedals Switch............. 8W-30-22
Ambient Temperature Sensor........... 8W-30-8
Auto Shut Down Relay.... 8W-30-4, 12, 15, 17, 20
Battery........... 8W-30-2, 6, 10, 16, 21, 24, 32
Battery Temperature Sensor......... 8W-30-8, 31
Body Control Module.............. 8W-30-5, 25
Boost Pressure Sensor............... 8W-30-31
Brake Lamp Switch............ 8W-30-7, 27, 37
Cabin Heater Assist................. 8W-30-28
Camshaft Position Sensor........... 8W-30-8, 30
Clockspring................... 8W-30-5, 29, 36
Clutch Pedal Interlock Switch.......... 8W-30-4
Clutch Pedal Upstop Switch........... 8W-30-36
Crank Case Ventilation Heater......... 8W-30-25
Crankshaft Position Sensor...... 8W-30-13, 18, 30
Data Link Connector.............. 8W-30-3, 28
Dosing Pump...................... 8W-30-28
ECM/PCM Relay........ 8W-30-24, 26, 30, 32, 34
EGR Solenoid................... 8W-30-16, 34
Engine Control Module . . . 8W-30-24, 25, 26, 27, 28,
29, 30, 31, 32, 33, 34, 35, 36, 37, 38
Engine Coolant Temp Sensor.... 8W-30-14, 19, 31
Engine Oil Pressure Sensor........... 8W-30-27
Engine Oil Pressure Switch............ 8W-30-7
EVAP/Purge Solenoid................. 8W-30-4
Front Control Module...... 8W-30-2, 5, 22, 28, 36
Fuel Heater....................... 8W-30-35
Fuel Heater Relay................ 8W-30-25, 35
Fuel Injector No. 1............ 8W-30-15, 20, 33
Fuel Injector No. 2............ 8W-30-15, 20, 33
Fuel Injector No. 3............ 8W-30-15, 20, 33
Fuel Injector No. 4............ 8W-30-15, 20, 33
Fuel Injector No. 5.................. 8W-30-20
Fuel Injector No. 6.................. 8W-30-20
Fuel Pressure Sensor................ 8W-30-37
Fuel Pressure Solenoid............... 8W-30-26
Fuel Pump Module................ 8W-30-5, 25
Fuel Pump Relay.................... 8W-30-5
Fuse 14........................... 8W-30-22
Fuse 15..................... 8W-30-21, 28, 35
Fuse 16 . . 8W-30-4, 12, 15, 17, 20, 24, 26, 30, 32, 34
Fuse 17.................... 8W-30-2, 5, 25, 35
Fuse 18........................ 8W-30-22, 24
Fuse 26........................... 8W-30-37Component Page
Fuselink.......................... 8W-30-32
G100................... 8W-30-2, 6, 16, 21, 25
G101.............. 8W-30-2, 6, 7, 10, 16, 21, 24
G103....................... 8W-30-24, 25, 28
G200............................. 8W-30-22
G300................... 8W-30-4, 7, 23, 27, 36
G302........................ 8W-30-5, 25, 35
Generator....................... 8W-30-4, 25
Glow Plug No. 1.................... 8W-30-32
Glow Plug No. 2.................... 8W-30-32
Glow Plug No. 3.................... 8W-30-32
Glow Plug No. 4.................... 8W-30-32
Glow Plug Relay.................... 8W-30-32
Idle Air Control Motor................ 8W-30-9
Ignition Coil.................... 8W-30-12, 17
Ignition Switch..................... 8W-30-10
Inlet Air Temperature Sensor....... 8W-30-13, 18
Input Speed Sensor................. 8W-30-21
Integrated Power Module . . 8W-30-2, 3, 4, 5, 10, 12,
15, 17, 20, 21, 22, 24, 25,
26, 28, 30, 32, 34, 35, 36, 37
Knock Sensor....................... 8W-30-9
Left Speed Control Switch.......... 8W-30-5, 29
Lift Pump Motor.................... 8W-30-35
Lift Pump Relay.................... 8W-30-35
Manifold Absolute Pressure Sensor . . . 8W-30-14, 19
Mass Air Flow Sensor................ 8W-30-26
Memory Seat/Mirror Module.......... 8W-30-22
Natural Vacuum Leak Detection
Assembly....................... 8W-30-10
Output Speed Sensor................ 8W-30-21
Oxygen Sensor 1/1 Upstream........... 8W-30-6
Oxygen Sensor 1/2 Downstream......... 8W-30-6
Powertrain Control Module . . 8W-30-2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21
Radiator Fan Relay............... 8W-30-12, 17
Radiator Fan Relay No. 1............. 8W-30-37
Radiator Fan Relay No. 2............. 8W-30-37
Radiator Fan Relay No. 3............. 8W-30-37
Right Speed Control Switch......... 8W-30-5, 29
Speed Control Servo.................. 8W-30-7
Starter Motor Relay............... 8W-30-5, 25
Throttle Position Sensor........... 8W-30-13, 18
Transmission Control Relay........... 8W-30-21
Transmission Range Sensor........... 8W-30-11
Transmission Solenoid/Pressure Switch
Assembly..................... 8W-30-11, 21
Vehicle Speed Sensor.............. 8W-30-9, 34
Water In Fuel Sensor................ 8W-30-36
RS8W-30 FUEL/IGNITION SYSTEM8W-30-1