central timer module DODGE RAM 2001 Service Service Manual

However, these tests may not prove conclusive in the
diagnosis of this system on models equipped with a
high-line or premium Central Timer Module (CTM).
In order to obtain conclusive testing of the wiper sys-
tem on models with a high-line or premium CTM, the
Chrysler Collision Detection (CCD) data bus network
and all of the electronic modules that provide inputs
to or receive outputs from the wiper system compo-
nents must be checked. The most reliable, efficient,
and accurate means to diagnose the wiper system on
models with a high-line or premium CTM requires
the use of a DRBIIItscan tool. Refer to the appro-
priate diagnostic information. The DRBIIItscan tool
can provide confirmation that the CCD data bus is
functional, that all of the electronic modules are
sending and receiving the proper messages on the
CCD data bus, and that the wiper relay is being sent
the proper hard wired outputs by the CTM for it to
perform its wiper system functions.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Check the fused ignition switch output (run-
acc) fuse (Fuse6-25ampere) in the Junction Block
(JB). If OK, go to Step 2. If not OK, repair the
shorted circuit or component as required and replace
the faulty fuse.
(2) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (run-acc) fuse (Fuse6-25ampere) in the JB.
If OK, go to Step 3. If not OK, repair the open fused
ignition switch output (run-acc) circuit between the
JB and the ignition switch as required.
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the instrument panel wire harness con-
nector for the multi-function switch from the switch
connector receptacle. Reconnect the battery negative
cable. Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output (run-acc) circuit cavity of the instrument
panel wire harness connector for the multi-function
switch. If OK, go to Step 4. If not OK, repair theopen fused ignition switch output circuit between the
multi-function switch and the JB as required.
(4) If the problem being diagnosed involves only
the intermittent wipe feature, go to Step 5. If the
problem being diagnosed involves all wiper modes, or
only the Low and/or High speed modes, go to Step 7.
(5) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the instrument panel wire harness con-
nector (Connector C1) for the Central Timer Module
(CTM) from the CTM connector receptacle. Check for
continuity between the wiper switch mode sense cir-
cuit cavities of the instrument panel wire harness
connector for the multi-function switch and the
instrument panel wire harness connector (Connector
C1) for the CTM. There should be continuity. If OK,
go to Step 6. If not OK, repair the open wiper switch
mode sense circuit between the multi-function switch
and the CTM as required.
(6) Check for continuity between the wiper switch
mode signal circuit cavities of the instrument panel
wire harness connector for the multi-function switch
and the instrument panel wire harness connector
(Connector C1) for the CTM. There should be conti-
nuity. If OK, proceed to the diagnosis for the wiper
relay. (Refer to 8 - ELECTRICAL/WIPERS/WASH-
ERS/WIPER RELAY - DIAGNOSIS AND TESTING).
If not OK, repair the open wiper switch mode signal
circuit between the multi-function switch and the
CTM as required.
(7) Check for continuity between the two wiper
switch low speed output circuit cavities of the instru-
ment panel wire harness connector for the multi-
function switch. There should be continuity. If OK, go
to Step 8. If not OK, repair the open wiper switch
low speed output circuit between the two cavities of
the instrument panel wire harness connector for the
multi-function switch as required.
(8) Test the multi-function switch continuity.
(Refer to 8 - ELECTRICAL/LAMPS/LIGHTING -
EXTERIOR/MULTI-FUNCTION SWITCH - DIAG-
NOSIS AND TESTING). If the multi-function switch
tests OK, reconnect the instrument panel wire har-
ness connector for the multi-function switch to the
switch connector receptacle and go to Step 9. If not
OK, replace the faulty multi-function switch and test
the wiper system operation again. If still not OK, go
to Step 9.
(9) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Measure the resistance between the headlamp and
dash wire harness ground wire for the wiper motor
and a good ground. The meter should read zero
ohms. If OK, go to Step 10. If not OK, repair the
open ground circuit to ground (G100) as required.
8R - 4 WIPERS/WASHERSBR/BE
WIPERS/WASHERS (Continued)

(10) Disconnect the headlamp and dash wire har-
ness connector for the wiper module from the wiper
motor pigtail wire connector. Reconnect the battery
negative cable. Turn the ignition switch to the On
position. Place the multi-function switch in the posi-
tions indicated in the tests below, and check for bat-
tery voltage at the appropriate cavity of the
headlamp and dash wire harness connector for the
wiper motor.
(a) Check for battery voltage at the fused igni-
tion switch output (run-acc) circuit cavity of the
headlamp and dash wire harness connector for the
wiper module with the multi-function switch in
any position. If OK, go to Step b. If not OK, repair
the open fused ignition switch output (run-acc) cir-
cuit between the wiper module and the JB as
required.
(b) Check for battery voltage at the wiper switch
low speed output circuit cavity of the headlamp
and dash wire harness connector for the wiper
module with the multi-function switch in the Lo
position. If OK, go to Step c. If not OK, repair the
open wiper switch low speed output circuit between
the wiper module and the multi-function switch as
required.
(c) Check for battery voltage at the wiper switch
high speed output circuit cavity of the headlamp
and dash wire harness connector for the wiper
module with the multi-function switch in the Hi
position. If OK, go to Step d. If not OK, repair the
open wiper switch high speed output circuit
between the wiper module and the multi-function
switch as required.
(d) Check for battery voltage at the wiper park
switch sense circuit cavity of the headlamp and
dash wire harness connector for the wiper module
with the multi-function switch in the Lo or Hi posi-
tion, then move the switch to the Off position. The
meter should switch between battery voltage and
zero volts while the wipers are cycling. The meter
should read battery voltage when the switch is
first moved to the Off position until the wipers
park, and then read a steady zero volts. If not OK,
replace the faulty wiper module.
WASHER SYSTEM
The diagnosis found here addresses an electrically
inoperative washer system. If the washer pump/mo-
tor operates, but no washer fluid is emitted from the
washer nozzles, be certain to check the fluid level in
the reservoir. Also inspect the washer system compo-
nents as required. (Refer to 8 - ELECTRICAL/WIP-
ERS/WASHERS - INSPECTION). Refer to the
appropriate wiring information. The wiring informa-
tion includes wiring diagrams, proper wire and con-
nector repair procedures, details of wire harnessrouting and retention, connector pin-out information
and location views for the various wire harness con-
nectors, splices and grounds.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERING
COLUMN, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
(1) Turn the ignition switch to the On position.
Turn the multi-function switch wiper control knob to
the Lo or Hi speed position. Check whether the wip-
ers operate. If OK, go to Step 2. If not OK, repair the
wiper system as required before proceeding with the
following tests. Refer to WIPER SYSTEM .
(2) Turn the multi-function switch wiper control
knob to the Off position. Depress the washer button.
The washer pump should operate and the wipers
should operate for as long as the washer button is
depressed. The wipers should continue to operate for
about three sweep cycles after the button is released
before they park. If the wipers are OK, but the wash-
ers are not, go to Step 3. If the washers are OK, but
the wipers are not, go to Step 5.
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the headlamp and dash wire harness con-
nector for the washer pump/motor from the motor
connector receptacle. Measure the resistance between
the ground circuit cavity of the headlamp and dash
wire harness connector for the washer pump/motor
and a good ground. The meter should read zero
ohms. If OK, go to Step 4. If not OK, repair the open
ground circuit to ground (G100) as required.
(4) Reconnect the battery negative cable. Turn the
ignition switch to the On position. With the washer
button depressed, check for battery voltage at the
washer switch output circuit cavity of the headlamp
and dash wire harness connector for the washer
pump/motor. If OK, replace the faulty washer pump/
motor. If not OK, repair the open washer switch out-
put circuit between the washer pump/motor and the
multi-function switch as required.
(5) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Disconnect the instrument panel wire harness con-
nector (Connector C1) for the Central Timer Module
BR/BEWIPERS/WASHERS 8R - 5
WIPERS/WASHERS (Continued)

(6) Disconnect the headlamp and dash wire har-
ness connector for the wiper motor from the wiper
motor pigtail wire connector.
(7) Disconnect the headlamp and dash wire har-
ness ground connector from the wiper motor ground
terminal.
(8) Remove the wiper module from the cowl ple-
num as a unit.
INSTALLATION
(1) Position the wiper module into the cowl ple-
num as a unit.
(2) Reconnect the headlamp and dash wire harness
ground connector to the wiper motor ground terminal
(Fig. 9).
(3) Reconnect the headlamp and dash wire harness
connector for the wiper motor to the wiper motor pig-
tail wire connector.
(4) Reach into the cowl plenum to align the wiper
module mounting bracket with the locations for the
mounting screws (Fig. 8).
(5) Install and tighten the four screws that secure
the wiper module bracket to the cowl plenum panel
and the dash panel. Tighten the screws to 8 N´m (72
in. lbs.).
(6) Reinstall the cowl plenum cover/grille panel
onto the cowl plenum. (Refer to 23 - BODY/EXTERI-
OR/COWL GRILLE - INSTALLATION).
(7) Reinstall the wiper arms onto the wiper pivots.
(Refer to 8 - ELECTRICAL/WIPERS/WASHERS/
WIPER ARMS - INSTALLATION).
(8) Reconnect the battery negative cable.
WIPER RELAY
DESCRIPTION
The wiper relay (or intermittent wipe relay) is
located in the Power Distribution Center (PDC) near
the battery in the engine compartment. See the fuse
and relay layout label affixed to the inside surface of
the PDC cover for wiper relay identification and loca-
tion. The wiper relay is a conventional International
Standards Organization (ISO) micro relay. Relays
conforming to the ISO specifications have common
physical dimensions, current capacities, terminal pat-
terns, and terminal functions. The relay is contained
within a small, rectangular, molded plastic housing.
The relay is connected to all of the required inputs
and outputs through its PDC receptacle by five male
spade-type terminals that extend from the bottom of
the relay base. The ISO designation for each termi-
nal is molded into the base adjacent to the terminal.
The ISO terminal designations are as follows:
²30 (Common Feed)- This terminal is con-
nected to the movable contact point of the relay.
²85 (Coil Ground)- This terminal is connected
to the ground feed side of the relay control coil.
²86 (Coil Battery)- This terminal is connected
to the battery feed side of the relay control coil.
²87 (Normally Open)- This terminal is con-
nected to the normally open fixed contact point of the
relay.
²87A (Normally Closed)- This terminal is con-
nected to the normally closed fixed contact point of
the relay.
The wiper relay cannot be adjusted or repaired. If
the relay is damaged or faulty, it must be replaced.
OPERATION
The wiper relay (or intermittent wipe relay) is an
electromechanical switch that uses a low current
input from the Central Timer Module (CTM) to con-
trol a high current output to the low speed brush of
the wiper motor. The movable common feed contact
point is held against the fixed normally closed con-
tact point by spring pressure. When the relay coil is
energized, an electromagnetic field is produced by the
coil windings. This electromagnetic field draws the
movable relay contact point away from the fixed nor-
mally closed contact point, and holds it against the
fixed normally open contact point. When the relay
coil is de-energized, spring pressure returns the mov-
able contact point back against the fixed normally
closed contact point. A resistor or diode is connected
in parallel with the relay coil in the relay, and helps
to dissipate voltage spikes and electromagnetic inter-
ference that can be generated as the electromagnetic
field of the relay coil collapses.
Fig. 9 Wiper Module Electrical Connections
1 - GROUND CONNECTOR
2 - WIPER MOTOR CONNECTOR
3 - GROUND TERMINAL
BR/BEWIPERS/WASHERS 8R - 15
WIPER MODULE (Continued)

should be continuity between the receptacle for ter-
minal 87A of the wiper relay in the PDC and the
wiper motor park switch sense circuit cavity of the
headlamp and dash wire harness connector for the
wiper motor at all times. If OK, go to Step 3. If not
OK, repair the open wiper motor park switch sense
circuit between the PDC and the wiper motor as
required.
(3) The relay normally open terminal (87) is con-
nected to a fused ignition switch output (run-acc)
fuse in the Junction Block (JB) through a fused igni-
tion switch output (run-acc) circuit. There should be
battery voltage at the receptacle for terminal 87 of
the wiper relay in the PDC whenever the ignition
switch is in the On or Accessory positions. If OK, go
to Step 4. If not OK, repair the open fused ignition
switch output (run-acc) circuit between the PDC and
the JB as required.
(4) The coil battery terminal (86) is connected to a
fused ignition switch output (run-acc) fuse in the JB
through a fused ignition switch output (run-acc) cir-
cuit. There should be battery voltage at the recepta-
cle for terminal 86 of the wiper relay in the PDC
whenever the ignition switch is in the On or Acces-
sory positions. If OK, go to Step 5. If not OK, repair
the open fused ignition switch output (run-acc) cir-
cuit between the PDC and the JB as required.
(5) The coil ground terminal (85) is connected to
the output of the Central Timer Module (CTM)
through the wiper motor relay control circuit. There
should be continuity between the receptacle for ter-
minal 85 of the wiper relay in the PDC and the wiper
motor relay control circuit cavity of the instrument
panel wire harness connector (Connector C1) for the
CTM at all times. If not OK, repair the open wiper
motor relay control circuit between the PDC and the
CTM as required.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.(2) Remove the cover from the Power Distribution
Center (PDC) (Fig. 11).
(3) See the fuse and relay layout label affixed to
the underside of the PDC cover for wiper relay iden-
tification and location.
(4) Remove the wiper relay by grasping it firmly
and pulling it straight out from the receptacle in the
PDC.
INSTALLATION
(1) See the fuse and relay layout label affixed to
the underside of the PDC cover for the proper wiper
relay location (Fig. 11).
(2) Position the wiper relay in the proper recepta-
cle in the PDC.
(3) Align the wiper relay terminals with the termi-
nal cavities in the PDC receptacle.
(4) Push firmly and evenly on the top of the wiper
relay until the terminals are fully seated in the ter-
minal cavities in the PDC receptacle.
(5) Reinstall the cover onto the PDC.
Fig. 11 Power Distribution Center
1 - COVER
2 - POWER DISTRIBUTION CENTER
BR/BEWIPERS/WASHERS 8R - 17
WIPER MOTOR RELAY (Continued)

WIRING
TABLE OF CONTENTS
page page
WIRING DIAGRAM INFORMATION....... 8W-01-1
COMPONENT INDEX.................. 8W-02-1
POWER DISTRIBUTION............... 8W-10-1
JUNCTION BLOCK.................... 8W-12-1
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
REAR WHEEL ANTILOCK BRAKES....... 8W-34-1
ALL WHEEL 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-43-1INTERIOR LIGHTING.................. 8W-44-1
CENTRAL TIMER MODULE............. 8W-45-1
AUDIO SYSTEM..................... 8W-47-1
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
SPLICE INFORMATION................ 8W-70-1
CONNECTOR PIN-OUTS............... 8W-80-1
CONNECTOR/GROUND LOCATIONS...... 8W-90-1
SPLICE LOCATIONS.................. 8W-95-1
POWER DISTRIBUTION............... 8W-97-1 BR/BEWIRING 8W - 1

8W-02 COMPONENT INDEX
Component Page
4WD Switch.......................... 8W-31
A/C Compressor Clutch Relay............ 8W-42
A/C Compressor Clutch................. 8W-42
A/C-Heater Control.................... 8W-42
A/C Heater Temperature Select........... 8W-42
A/C High Pressure Switch............... 8W-42
A/C Low Pressure Switch................ 8W-42
Accelerator Pedal Position Sensor......... 8W-30
Aftermarket Center High Mounted
Stop Lamp......................... 8W-51
Aftermarket Trailer Tow Connector........ 8W-54
Airbag Control Module.................. 8W-43
Ambient Temperature Sensor............ 8W-49
Ash Receiver Lamp.................... 8W-44
Automatic Day/Night Mirror............. 8W-49
Automatic Shut Down Relay............. 8W-30
Auxiliary Battery...................... 8W-20
Back-Up Lamp Switch.................. 8W-51
Back-Up Lamps....................... 8W-51
Battery Temperature Sensor............. 8W-30
Battery............................. 8W-20
Blend Door Actuator................... 8W-42
Blower Motor Relay.................... 8W-42
Blower Motor Resistor Block............. 8W-42
Blower Motor......................... 8W-42
Brake Lamp Switch.................... 8W-51
Brake Pressure Switch............... 8W-34, 35
Bypass Jumper....................... 8W-21
Camshaft Position Sensor............... 8W-30
Capacitor......................... 8W-10, 30
Cargo Lamps......................... 8W-44
Center High Mounted Stop Lamps........ 8W-51
Center Identification Lamp.............. 8W-50
Central Timer Module.................. 8W-45
Cigar Lighter......................... 8W-41
Circuit Breakers...................... 8W-12
Clockspring.................. 8W-33, 41, 43, 47
Clutch Pedal Position Switch............. 8W-21
Combination Flasher................... 8W-52
Controller Antilock Brake............ 8W-34, 35
Crankshaft Position Sensor.............. 8W-30
Cummins Bus........................ 8W-18
Cup Holder Lamp..................... 8W-44
Cylinder Lock Switches................ 8W-39
Data Link Connector................... 8W-18
Daytime Running Lamp Module.......... 8W-50
Dome Lamp.......................... 8W-44
Door Ajar Switches.................... 8W-45
Door Lock Motors..................... 8W-61
Door Window/Lock Switches.......... 8W-60, 61
Driver Airbag......................... 8W-43
Duty Cycle EVAP/Purge Solenoid......... 8W-30Component Page
Electric Brake Provision................ 8W-54
Engine Control Module.............. 8W-30, 70
Engine Coolant Temperature Sensor....... 8W-30
Engine Oil Pressure Sensor.............. 8W-30
Engine Starter Motor Relay.............. 8W-21
Engine Starter Motor................... 8W-21
Fender Lamp......................... 8W-51
Fog Lamp Indicator.................... 8W-50
Fog Lamp Relay....................... 8W-50
Fog Lamp............................ 8W-50
Fuel Heater Relay..................... 8W-30
Fuel Heater.......................... 8W-30
Fuel Injection Pump................... 8W-30
Fuel Injectors......................... 8W-30
Fuel Transfer Pump.................... 8W-30
Fuses (JB)........................... 8W-12
Fuses (PDC).......................... 8W-10
Fusible Link....................... 8W-20, 30
Generator............................ 8W-20
Glove Box Lamp And Switch............. 8W-44
Grounds............................. 8W-15
Headlamp Beam Select Switch........... 8W-50
Headlamp Switch...................... 8W-50
Headlamp........................... 8W-50
Heated Mirror Relay................... 8W-62
Heated Mirror Switch.................. 8W-62
Heated Seat Cushions.................. 8W-63
Heated Seat Relay..................... 8W-12
Heated Seat Switches.................. 8W-63
High Beam Indicator................... 8W-40
High Note Horn....................... 8W-41
Horn Relay.......................... 8W-41
Horn Switch.......................... 8W-41
Idle Air Control Motor.................. 8W-30
Ignition Coil 4-Pack.................... 8W-30
Ignition Coil 6-Pack.................... 8W-30
Ignition Coil.......................... 8W-30
Ignition Switch....................... 8W-10
Instrument Cluster.................... 8W-40
Intake Air Heater Relays................ 8W-30
Intake Air Heater..................... 8W-30
Intake Air Temperature Sensor........... 8W-30
Intermittent Wiper Switch............... 8W-53
Joint Connectors . . 8W-10, 12, 15, 30, 31, 34, 35, 40,
44, 45, 51, 53, 70
Junction Block........................ 8W-12
Leak Detection Pump.................. 8W-30
License Lamp......................... 8W-51
Low Note Horn....................... 8W-41
Lumbar Motors....................... 8W-63
Manifold Absolute Pressure Sensor........ 8W-30
Manifold Air Pressure Sensor............ 8W-30
BR/BE8W-02 COMPONENT INDEX 8W - 02 - 1

8W-10 POWER DISTRIBUTION
Component Page
A/C Compressor Clutch Relay.......... 8W-10-27
A/C Compressor Clutch............... 8W-10-27
Aftermarket Center High Mounted
Stop Lamp....................... 8W-10-13
Aftermarket Trailer Tow Connector...... 8W-10-21
Automatic Shut Down Relay......... 8W-10-14, 20
Auxiliary Battery..................... 8W-10-8
Battery............................ 8W-10-8
Blower Motor Relay.................. 8W-10-23
Blower Motor....................... 8W-10-23
Brake Lamp Switch.................. 8W-10-13
Capacitor.......................... 8W-10-16
Center High Mounted Stop Lamp No. 1 . . . 8W-10-13
Center High Mounted Stop Lamp No. 2 . . . 8W-10-13
Central Timer Module C1............. 8W-10-22
Central Timer Module C2............. 8W-10-26
Circuit Breaker 2.................... 8W-10-10
Clockspring........................ 8W-10-26
Combination Flasher................. 8W-10-13
Controller Antilock Brake............. 8W-10-23
Daytime Running Lamp Module........ 8W-10-25
Electric Brake Provision............ 8W-10-13, 21
Engine Control Module............... 8W-10-12
Engine Starter Motor Relay............ 8W-10-23
Engine Starter Motor................. 8W-10-23
Fog Lamp Relay..................... 8W-10-25
Fuel Heater Relay................... 8W-10-20
Fuel Heater........................ 8W-10-20
Fuel Injection Pump.................. 8W-10-12
Fuel Injector No. 1................ 8W-10-15, 16
Fuel Injector No. 2................ 8W-10-15, 16
Fuel Injector No. 3................ 8W-10-15, 16
Fuel Injector No. 4................ 8W-10-15, 16
Fuel Injector No. 5................ 8W-10-15, 16
Fuel Injector No. 6................ 8W-10-15, 16
Fuel Injector No. 7................ 8W-10-15, 16
Fuel Injector No. 8................ 8W-10-15, 16
Fuel Injector No. 9................... 8W-10-16
Fuel Injector No. 10.................. 8W-10-16
Fuel Pump Module................... 8W-10-11
Fuel Pump Relay................. 8W-10-11, 12
Fuse 1 (JB)........................ 8W-10-10
Fuse 1 (PDC)..................... 8W-10-10, 8
Fuse 2 (PDC).................. 8W-10-8, 10, 22
Fuse 3 (PDC).................. 8W-10-8, 11, 12
Fuse 4 (JB)........................ 8W-10-10
Fuse 4 (PDC)..................... 8W-10-13, 8
Fuse 5 (PDC)..................... 8W-10-13, 8
Fuse 6 (PDC).................. 8W-10-14, 20, 8
Fuse 7 (PDC)..................... 8W-10-20, 8
Fuse 8 (PDC)..................... 8W-10-21, 8
Fuse 9 (PDC)..................... 8W-10-23, 8
Fuse 10 (PDC).................... 8W-10-22, 8
Fuse 11 (PDC).................... 8W-10-23, 8
Fuse 12 (JB)....................... 8W-10-10
Fuse 12 (PDC).................... 8W-10-23, 8
Fuse 13 (JB)....................... 8W-10-10Component Page
Fuse 14 (JB)....................... 8W-10-10
Fuse B (PDC)..................... 8W-10-24, 9
Fuse C (PDC)..................... 8W-10-24, 9
Fuse E (PDC)..................... 8W-10-24, 9
Fuse F (PDC)..................... 8W-10-24, 9
Fuse G (PDC)..................... 8W-10-25, 9
Fuse GEN (PDC).................. 8W-10-27, 8
Fuse H (PDC).................... 8W-10-26, 9
Fuse I (PDC)..................... 8W-10-26, 9
Fuse J (PDC)..................... 8W-10-27, 9
Fuse K (PDC)..................... 8W-10-14, 9
Fuse L (PDC)..................... 8W-10-27, 9
G201............................. 8W-10-22
Generator......................... 8W-10-27
Headlamp Beam Select Switch.......... 8W-10-25
Headlamp Switch.................... 8W-10-24
High Note Horn..................... 8W-10-26
Horn Relay...................... 8W-10-26, 9
Ignition Coil 4-Pack.................. 8W-10-16
Ignition Coil 6-Pack.................. 8W-10-16
Ignition Coil........................ 8W-10-15
Ignition Switch................... 8W-10-10, 22
Joint Connector No. 1.............. 8W-10-25, 26
Joint Connector No. 2..... 8W-10-11, 12, 14, 20, 21
Joint Connector No. 5................ 8W-10-22
Joint Connector No. 6........... 8W-10-13, 22, 26
Joint Connector No. 8................ 8W-10-22
Junction Block................... 8W-10-10, 13
Left Fog Lamp...................... 8W-10-25
Left Headlamp...................... 8W-10-24
Left Outboard Headlamp........... 8W-10-24, 25
Low Note Horn..................... 8W-10-26
Oxygen Sensor 1/1 Left Bank Up . . 8W-10-17, 18, 19
Oxygen Sensor 1/1 Upstream........... 8W-10-17
Oxygen Sensor 1/2 Downstream......... 8W-10-17
Oxygen Sensor 1/2 Left Bank Down...... 8W-10-19
Oxygen Sensor 1/2 Pre-Catalyst......... 8W-10-18
Oxygen Sensor 1/3 Post-Catalyst........ 8W-10-18
Oxygen Sensor 2/1 Right Bank Up . 8W-10-17, 18, 19
Oxygen Sensor 2/2 Right Bank Down..... 8W-10-19
Oxygen Sensor Downstream Relay.... 8W-10-18, 19
Power Distribution Center . 8W-10-2, 8, 9, 10, 11, 12,
13, 14, 20, 21, 22, 23,
24, 25, 26, 27
Power Outlet....................... 8W-10-27
Powertrain Control Module . 8W-10-11, 12, 15, 16, 20
Quad High Beam Relay............... 8W-10-24
Right Fog Lamp..................... 8W-10-25
Right Headlamp..................... 8W-10-24
Right Outboard Headlamp.......... 8W-10-24, 25
Security Relay...................... 8W-10-25
Trailer Tow Connector................ 8W-10-21
Trailer Tow Relay.................... 8W-10-21
Transmission Control Relay............ 8W-10-26
Transmission Solenoid Assembly........ 8W-10-26
Turn Signal/Hazard Switch............ 8W-10-13
BR/BE8W-10 POWER DISTRIBUTION 8W - 10 - 1

8W-12 JUNCTION BLOCK
Component Page
A/C Compressor Clutch Relay.......... 8W-12-13
A/C-Heater Control................... 8W-12-9
A/C Heater Temperature Select......... 8W-12-8
Airbag Control Module............... 8W-12-17
Ambient Temperature Sensor.......... 8W-12-19
Ash Receiver Lamp................... 8W-12-9
Automatic Day/Night Mirror..... 8W-12-13, 15, 21
Back-Up Lamp Switch............. 8W-12-11, 21
Blend Door Actuator.................. 8W-12-8
Blower Motor Relay.................. 8W-12-8
Cargo Lamp No. 1................... 8W-12-14
Cargo Lamp No. 2................... 8W-12-14
Central Timer Module C1....... 8W-12-10, 13, 15
Central Timer Module C2........... 8W-12-8, 13
Cigar Lighter...................... 8W-12-16
Circuit Breaker 1.................. 8W-12-6, 7
Circuit Breaker 2.................... 8W-12-7
Combination Flasher......... 8W-12-6, 12, 15, 20
Controller Antilock Brake.............. 8W-12-8
Cup Holder Lamp.................... 8W-12-9
Data Link Connector................. 8W-12-14
Daytime Running Lamp Module........ 8W-12-11
Dome Lamp....................... 8W-12-14
Driver Door Window/Lock Switch..... 8W-12-15, 7
Driver Heated Seat Switch........... 8W-12-8, 9
Driver Power Seat Switch.............. 8W-12-7
Duty Cycle EVAP/Purge Solenoid....... 8W-12-13
Engine Control Module............... 8W-12-12
Fuel Heater Relay................... 8W-12-13
Fuel Pump Relay................... 8W-12-12
Fuse 1 (JB)......................... 8W-12-8
Fuse 1 (PDC)...................... 8W-12-16
Fuse 2 (JB)....................... 8W-12-6, 8
Fuse 3 (JB)....................... 8W-12-6, 8
Fuse 4 (JB)........................ 8W-12-10
Fuse 4 (PDC)...................... 8W-12-20
Fuse 5 (JB)......................... 8W-12-9
Fuse 6 (JB)...................... 8W-12-6, 10
Fuse 7 (JB)...................... 8W-12-6, 11
Fuse 8 (JB)...................... 8W-12-6, 11
Fuse 9 (JB)...................... 8W-12-6, 12
Fuse 10 (JB).................. 8W-12-6, 12, 20
Fuse 11 (JB)..................... 8W-12-6, 13
Fuse 12 (JB)....................... 8W-12-14
Fuse 13 (JB)....................... 8W-12-15
Fuse 14 (JB)....................... 8W-12-16Component Page
Fuse 15 (JB)..................... 8W-12-6, 16
Fuse 16 (JB)..................... 8W-12-6, 16
Fuse 17 (JB)..................... 8W-12-6, 17
Fuse 18 (JB)..................... 8W-12-6, 17
Fuse 19 (JB)..................... 8W-12-6, 17
G100............................. 8W-12-18
G200.......................... 8W-12-15, 19
G201....................... 8W-12-15, 18, 20
Glove Box Lamp And Switch........... 8W-12-14
Headlamp Switch.................... 8W-12-9
Heated Mirror Switch................. 8W-12-8
Heated Seat Relay................... 8W-12-8
Ignition Switch................... 8W-12-6, 20
Instrument Cluster.......... 8W-12-9, 16, 17, 18
Intermittent Wiper Switch............ 8W-12-10
Joint Connector No. 1............. 8W-12-11, 21
Joint Connector No. 3................ 8W-12-18
Joint Connector No. 4................ 8W-12-18
Joint Connector No. 5.............. 8W-12-9, 14
Joint Connector No. 6................ 8W-12-10
Joint Connector No. 8........... 8W-12- 8, 9, 17
Junction Block............ 8W-12-2, 3, 6, 7, 8, 9,
10, 11, 12, 13, 14, 15, 16,
17, 18, 19, 20, 21
Left Park/Turn Signal Lamp........... 8W-12-18
Left Visor/Vanity Lamp............ 8W-12-14, 15
Overhead Console.......... 8W-12-13, 14, 19, 21
Park/Neutral Position Switch....... 8W-12-11, 21
Passenger Airbag On/Off Switch........ 8W-12-17
Passenger Door Window/Lock Switch . . 8W-12-7, 15
Passenger Heated Seat Switch........ 8W-12-8, 9
Passenger Power Seat Switch........... 8W-12-7
Power Distribution Center......... 8W-12-16, 20
Power Mirror Switch.............. 8W-12-14, 21
Powertrain Control Module............ 8W-12-12
Radio Choke Relay.................. 8W-12-10
Radio....................... 8W-12-9, 11, 14,
Right Park/Turn Signal Lamp.......... 8W-12-18
Right Visor/Vanity Lamp........... 8W-12-14, 15
Seat Heat Interface Module............ 8W-12-8
Turn Signal/Hazard Switch......... 8W-12-18, 20
Underhood Lamp................... 8W-12-14
Windshield Washer Pump............. 8W-12-10
Wiper Motor Relay.................. 8W-12-10
Wiper Motor....................... 8W-12-10
BR/BE8W-12 JUNCTION BLOCK 8W - 12 - 1

8W-15 GROUND DISTRIBUTION
Component Page
A/C Compressor Clutch............... 8W-15-10, 8
A/C-Heater Control.................... 8W-15-14
A/C Heater Temperature Select........... 8W-15-12
Aftermarket Trailer Tow Connector......... 8W-15-6
Airbag Control Module.................. 8W-15-5
Ash Receiver Lamp.................... 8W-15-14
Automatic Day/Night Mirror............. 8W-15-13
Auxiliary Battery..................... 8W-15-11
Battery............................ 8W-15-11
Blend Door Actuator................... 8W-15-12
Blower Motor Relay.................... 8W-15-2
Brake Lamp Switch................... 8W-15-12
Brake Pressure Switch.................. 8W-15-3
Center High Mounted Stop Lamp No. 1..... 8W-15-17
Center High Mounted Stop Lamp No. 2..... 8W-15-17
Center Identification Lamp.............. 8W-15-18
Central Timer Module C1............... 8W-15-12
Central Timer Module C2............... 8W-15-13
Cigar Lighter........................ 8W-15-14
Clockspring.......................... 8W-15-4
Combination Flasher.................. 8W-15-13
Controller Antilock Brake................ 8W-15-5
Cummins Bus....................... 8W-15-10
Cup Holder Lamp..................... 8W-15-14
Data Link Connector.............. 8W-15-8, 10, 12
Daytime Running Lamp Module......... 8W-15-2, 3
Driver Cylinder Lock Switch............. 8W-15-16
Driver Door Ajar Switch................ 8W-15-16
Driver Door Window/Lock Switch....... 8W-15-16, 17
Driver Heated Seat Cushion............. 8W-15-15
Driver Heated Seat Switch.............. 8W-15-13
Driver Power Seat Switch............ 8W-15-15, 17
Electric Brake Provision................ 8W-15-14
Engine Control Module.................. 8W-15-9
Engine Starter Motor Relay............. 8W-15-8, 9
Fuel Heater Relay..................... 8W-15-2
Fuel Heater......................... 8W-15-10
Fuel Injection Pump.................... 8W-15-9
Fuel Pump Module..................... 8W-15-7
Fuel Pump Relay...................... 8W-15-2
Fuel Transfer Pump................... 8W-15-10
G100.......................... 8W-15-12, 5, 7
G101............................... 8W-15-5
G102............................... 8W-15-2
G105............................... 8W-15-8
G107.............................. 8W-15-10
G113 .............................. 8W-15-11
G114 .............................. 8W-15-11
G115 .............................. 8W-15-11
G116 .............................. 8W-15-11
G117 .............................. 8W-15-11
G118 .............................. 8W-15-11
G120.............................. 8W-15-11
G200......................... 8W-15-7, 12, 14
G201........................... 8W-15-12, 14
G300.............................. 8W-15-16
G301.............................. 8W-15-17
G302.............................. 8W-15-18
Glove Box Lamp And Switch............. 8W-15-14
Headlamp Beam Select Switch............ 8W-15-14
Headlamp Switch.................. 8W-15-13, 14
Heated Mirror Switch.................. 8W-15-13
High Note Horn....................... 8W-15-7
Ignition Switch....................... 8W-15-13
Instrument Cluster................. 8W-15-12, 14
Intake Air Heater Relay No. 1............. 8W-15-9Component Page
Intake Air Heater Relay No. 2............. 8W-15-9
Joint Connector No. 1................... 8W-15-2
Joint Connector No. 2................... 8W-15-9
Joint Connector No. 3................... 8W-15-7
Joint Connector No. 4................... 8W-15-3
Joint Connector No. 5.................. 8W-15-13
Joint Connector No. 6................... 8W-15-4
Joint Connector No. 8................ 8W-15-13, 5
Junction Block.................... 8W-15-12, 13
Left Back-Up Lamp.................... 8W-15-6
Left Front Door Speaker................. 8W-15-4
Left Front Fender Lamp................. 8W-15-6
Left License Lamp..................... 8W-15-6
Left Outboard Clearance Lamp........... 8W-15-18
Left Outboard Identification Lamp......... 8W-15-18
Left Park/Turn Signal Lamp.............. 8W-15-3
Left Power Mirror..................... 8W-15-16
Left Rear Fender Lamp................. 8W-15-6
Left Remote Radio Switch................ 8W-15-4
Left Tail/Stop/Turn Signal Lamp........... 8W-15-6
Left Visor/Vanity Lamp................. 8W-15-13
Low Note Horn....................... 8W-15-7
Overdrive Switch..................... 8W-15-12
Overhead Console..................... 8W-15-12
Oxygen Sensor 1/2 Left Bank Down......... 8W-15-8
Oxygen Sensor 1/2 Pre-Catalyst............ 8W-15-8
Oxygen Sensor 1/3 Post-Catalyst........... 8W-15-8
Oxygen Sensor 2/2 Right Bank Down........ 8W-15-8
Passenger Airbag On/Off Switch........... 8W-15-5
Passenger Cylinder Lock Switch.......... 8W-15-16
Passenger Door Ajar Switch.............. 8W-15-16
Passenger Door Window/Lock Switch....... 8W-15-16
Passenger Heated Seat Cushion........... 8W-15-15
Passenger Heated Seat Switch............ 8W-15-13
Passenger Power Seat Switch............ 8W-15-15
Power Distribution Center............... 8W-15-2
Power Mirror Switch................... 8W-15-16
Power Outlet........................ 8W-15-14
Powertrain Control Module............ 8W-15-8 , 10
Quad High Beam Relay................. 8W-15-2
Radio Choke Relay..................... 8W-15-4
Radio.............................. 8W-15-5
Right Back-Up Lamp................... 8W-15-6
Right Front Door Speaker................ 8W-15-4
Right Front Fender Lamp................ 8W-15-6
Right License Lamp.................... 8W-15-6
Right Outboard Clearance Lamp.......... 8W-15-18
Right Outboard Identification Lamp........ 8W-15-18
Right Park/Turn Signal Lamp............. 8W-15-7
Right Power Mirror................... 8W-15-16
Right Rear Fender Lamp................ 8W-15-6
Right Remote Radio Switch............... 8W-15-4
Right Tail/Stop/Turn Signal Lamp.......... 8W-15-6
Right Visor/Vanity Lamp................ 8W-15-13
Seat Belt Switch................... 8W-15-15, 17
Seat Heat Interface Module.............. 8W-15-15
Security Relay........................ 8W-15-2
Speed Control Servo.................... 8W-15-3
Tailgate Lamp........................ 8W-15-6
Trailer Tow Connector.................. 8W-15-6
Trailer Tow Relay...................... 8W-15-2
Underhood Lamp...................... 8W-15-3
Washer Fluid Level Switch............... 8W-15-3
Windshield Washer Pump................ 8W-15-7
Wiper Motor......................... 8W-15-7
BR/BE8W-15 GROUND DISTRIBUTION 8W - 15 - 1

8W-30 FUEL/IGNITION SYSTEM
Component Page
A/C Compressor Clutch Relay.... 8W-30-14, 38, 39
A/C-Heater Control............... 8W-30-14, 39
A/C High Pressure Switch.......... 8W-30-14, 39
A/C Low Pressure Switch.......... 8W-30-14, 39
Accelerator Pedal Position Sensor....... 8W-30-30
Airbag Control Module............ 8W-30-40, 15
Automatic Shut Down Relay . . . 8W-30-3, 17, 18, 19,
22, 23, 24, 25, 26, 27, 28
Battery Temperature Sensor............ 8W-30-4
Battery........................... 8W-30-35
Brake Lamp Switch.............. 8W-30-7, 8, 37
Camshaft Position Sensor........... 8W-30-5, 32
Capacitor......................... 8W-30-28
Central Timer Module C2.......... 8W-30-15, 40
Clockspring...................... 8W-30-7, 34
Controller Antilock Brake.... 8W-30-13, 15, 38, 40
Crankshaft Position Sensor............ 8W-30-13
Cummins Bus...................... 8W-30-29
Data Link Connector...... 8W-30-2, 15, 16, 40, 41
Duty Cycle EVAP/Purge Solenoid....... 8W-30-13
Engine Control Module . . 8W-30-3, 7, 29, 30, 31, 32,
33, 34, 35, 36, 37, 39, 40, 41
Engine Coolant Temperature Sensor . . . 8W-30-9, 34
Engine Oil Pressure Sensor......... 8W-30-33, 13
Fuel Heater Relay................... 8W-30-36
Fuel Heater........................ 8W-30-36
Fuel Injection Pump.............. 8W-30-31, 37
Fuel Injector No. 1............... 8W-30-23, 26
Fuel Injector No. 2............... 8W-30-24, 27
Fuel Injector No. 3............... 8W-30-23, 26
Fuel Injector No. 4............... 8W-30-24, 27
Fuel Injector No. 5............... 8W-30-23, 26
Fuel Injector No. 6............... 8W-30-24, 27
Fuel Injector No. 7............... 8W-30-23, 26
Fuel Injector No. 8............... 8W-30-24, 27
Fuel Injector No. 9.................. 8W-30-26
Fuel Injector No. 10................. 8W-30-27
Fuel Pump Module.................. 8W-30-12
Fuel Pump Relay......... 8W-30-3, 11, 12, 31, 37
Fuel Tank Module................... 8W-30-42
Fuel Transfer Pump................. 8W-30-34
Fuse 3 (PDC)............... 8W-30-2, 11, 29, 37
Fuse 6 (PDC)....................... 8W-30-3
Fuse 7 (PDC)...................... 8W-30-36
Fuse 9 (JB)................. 8W-30-2, 3, 11, 36
Fuse 11 (JB)................. 8W-30-13, 36, 39
Fuse 12 (JB).................... 8W-30-16, 41
Fuse K (PDC).............. 8W-30-17, 18, 19, 22
Fusible Link....................... 8W-30-35
G100............................. 8W-30-12
G102.......................... 8W-30-36, 37
G105..................... 8W-30-2, 16, 20, 21Component Page
G107.......................... 8W-30-34, 36
G113 .......................... 8W-30-14, 34
G200.......................... 8W-30-16, 37
Generator...................... 8W-30-13, 38
Idle Air Control Motor................ 8W-30-9
Ignition Coil 4-Pack................. 8W-30-28
Ignition Coil 6-Pack................. 8W-30-28
Ignition Coil....................... 8W-30-25
Instrument Cluster............ 8W-30-15, 34, 40
Intake Air Heater Relay No. 1......... 8W-30-35
Intake Air Heater Relay No. 2......... 8W-30-35
Intake Air Heater................... 8W-30-35
Intake Air Temperature Sensor...... 8W-30-10, 32
Joint Connector No. 1 . . . 8W-30-4, 7, 12, 36, 37, 42
Joint Connector No. 2......... 8W-30-2, 3, 11, 17,
18, 19, 22, 23, 24, 25,
26, 27, 28, 29, 35, 37
Joint Connector No. 5............. 8W-30-16, 41
Joint Connector No. 7............. 8W-30-15, 40
Junction Block . . . 8W-30-2, 3, 11, 13, 16, 36, 39, 41
Leak Detection Pump................. 8W-30-8
Left Speed Control Switch............. 8W-30-7
Manifold Absolute Pressure Sensor...... 8W-30-10
Manifold Air Pressure Sensor.......... 8W-30-33
Output Speed Sensor................. 8W-30-5
Overdrive Switch.................... 8W-30-6
Overhead Console................ 8W-30-40, 15
Oxygen Sensor 1/1 Left Bank Up . . . 8W-30-18, 22, 20
Oxygen Sensor 1/1 Upstream.......... 8W-30-17
Oxygen Sensor 1/2 Downstream........ 8W-30-17
Oxygen Sensor 1/2 Left Bank Down..... 8W-30-20
Oxygen Sensor 1/2 Pre-Catalyst........ 8W-30-21
Oxygen Sensor 1/3 Post-Catalyst....... 8W-30-21
Oxygen Sensor 2/1 Right Bank Up . . . 8W-30-18, 22,
20
Oxygen Sensor 2/2 Right Bank Down.... 8W-30-20
Oxygen Sensor Downstream Relay...... 8W-30-19
Park/Neutral Position Switch....... 8W-30-13, 38
Power Distribution Center . . 8W-30-2, 3, 11, 17, 18,
22, 23, 24, 25, 26, 27, 28, 29, 36, 37
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, 22, 23, 24, 25 26, 27,
28, 36, 37,38, 39, 40, 41, 42
PTO Switch..................... 8W-30-14, 34
Radio.......................... 8W-30-15, 40
Right Speed Control Switch............ 8W-30-7
Speed Control Servo.................. 8W-30-5
Throttle Position Sensor.............. 8W-30-14
Transmission Control Relay............ 8W-30-5
Transmission Solenoid Assembly . . . 8W-30-6, 14, 39
Water In Fuel Sensor................ 8W-30-34
BR/BE8W-30 FUEL/IGNITION SYSTEM 8W - 30 - 1