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
GROUP TOPIC
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
DESCRIPTION - CONNECTOR, GROUND AND
SPLICE INFORMATION
CAUTION: Not all connectors are serviced. Some
connectors are serviced only with a harness. A typ-
ical example might be the Supplemental Restraint
System connectors. Always check parts availability
before attempting a repair.
IDENTIFICATION
In-line connectors are identified by a number, as
follows:
²In-line connectors located in the engine compart-
ment are C100 series numbers
²In-line connectors located in the Instrument
Panel area are C200 series numbers.
²In-line connectors located in the body are C300
series numbers.
²Jumper harness connectors are C400 series
numbers.
²Grounds and ground connectors are identified
with a ªGº and follow the same series numbering as
the in-line connectors.
²Splices are identified with an ªSº and follow the
same series numbering as the in-line connectors.
²Component connectors are identified by the com-
ponent name instead of a number. Multiple connec-
tors on a component use a C1, C2, etc. identifier.
LOCATIONS
Section 8W-91 contains connector/ground/splice
location illustrations. The illustrations contain the
connector name (or number)/ground number/splice
number and component identification. Connector/
ground/splice location charts in section 8W-91 refer-
ence the figure numbers of the illustrations.
The abbreviation T/O is used in the component
location section to indicate a point in which the wir-
ing harness branches out to a component. The abbre-
viation N/S means Not Shown in the illustrations
Fig. 4 WIRE CODE IDENTIFICATION
1 - COLOR OF WIRE (LIGHT BLUE WITH YELLOW TRACER
2 - GAGE OF WIRE (18 GAGE)
3 - PART OF MAIN CIRCUIT (VARIES DEPENDING ON
EQUIPMENT)
4 - MAIN CIRCUIT IDENTIFICATION
8W - 01 - 6 8W-01 WIRING DIAGRAM INFORMATIONBR/BE
WIRING DIAGRAM INFORMATION (Continued)
INSTRUMENT CLUSTER C2 - 10 WAY
CAV CIRCUIT FUNCTION
1 E2 22OR PANEL LAMPS FEED
2 G29 22BK/WT WASHER FLUID SWITCH SENSE
3 G10 22LG/RD SEAT BELT SWITCH SENSE
4- -
5 E17 18YL/BK DAY BRIGHTNESS SENSE
6 L61 18LG LEFT TURN SIGNAL
7 G13 22DB/RD CHIME REQUEST SIGNAL
8 L60 18TN RIGHT TURN SIGNAL
9 G34 16RD/GY HIGH BEAM INDICATOR DRIVER
10 G107 22GY 4WD SWITCH SENSE
INTAKE AIR HEATER RELAYS (DIESEL)-4WAY
CAV CIRCUIT FUNCTION
1 S22 18OR/BK AIR INTAKE HEATER RELAY CONTROL NO. 2
2 Z12 18BK/TN GROUND
3 S21 18YL/BK AIR INTAKE HEATER RELAY CONTROL NO. 1
4 Z12 18BK/TN GROUND
INTAKE AIR TEMPERATURE SENSOR (DIESEL)-2WAY
CAV CIRCUIT FUNCTION
A K104 18BK/LB SENSOR GROUND
B K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
INTAKE AIR TEMPERATURE SENSOR (GAS) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 K4 18BK/LB SENSOR GROUND
2 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
JOINT CONNECTOR NO. 1 (IN PDC) - 28 WAY
CAV CIRCUIT FUNCTION
1 V40 20WT/PK BRAKE SWITCH SENSE
2 V40 22WT/PK BRAKE SWITCH SENSE
3 V40 22WT/PK BRAKE SWITCH SENSE
4 L4 18VT/WT DIMMER SWITCH LOW BEAM OUTPUT
5 L4 16VT/WT DIMMER SWITCH LOW BEAM OUTPUT
5 L4 16VT/WT(QUAD) DIMMER SWITCH LOW BEAM OUTPUT
8W - 80 - 50 8W-80 CONNECTOR PIN-OUTSBR/BE
8W-91 CONNECTOR/GROUND/SPLICE LOCATION
TABLE OF CONTENTS
page
CONNECTOR/GROUND/SPLICE LOCATION
DESCRIPTION..........................1
CONNECTOR/GROUND/SPLICE
LOCATION
DESCRIPTION
This section provides illustrations identifying con-
nector, ground, and splice locations in the vehicle.Connector, ground, and splice indexes are provided.
Use the wiring diagrams in each section for connec-
tor, ground, and splice identification. Refer to the
index for the proper figure number. For items that
are not shown in this section N/S is placed in the
Fig. column.
CONNECTORS
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
4WD Switch BK On Front Axle N/S
A/C Compressor Clutch BK Rear of A/C Compressor 7, 8, 11
A/C Heater Control BK Center of Instrument Panel 33
A/C Heater Temperature
SelectNAT Center of Instrument Panel 33
A/C High Pressure Switch BK At A/C Compressor 7, 8, 11
A/C Low Pressure Switch BK Top of A/C Accumulator 1, 3
Accelerator Pedal Position
Sensor (Diesel)Left Front of Engine 13, 14
Aftermarket Trailer Tow
ConnectorRear of Vehicle N/S
Airbag Control Module Center of I.P. at Airbag Control Module 30
Ambient Temperature Sensor BK Radiator Left Support N/S
Ash Receiver Lamp BK Center of Instrument Panel 34
Back-up Lamp Switch (M/T) BK Top of Transmission 16
Battery Temperature Sensor BK Below Battery Tray 21
Blend Door Actuator Center of Instrument Panel N/S
Blower Motor BK Bottom Right of Instrument Panel 30
Blower Motor Resistor Block BK Bottom Right of Instrument Panel 34
Brake Lamp Switch Brake Pedal Arm 30, 32
Brake Pressure Switch BK At Master Cylinder 18
Bypass Jumper (A/T) GN Top Of Clutch Pedal 35
C105 Rear of Front Bumper N/S
C106 BK Rear of Front Bumper 22
C114 BK Radiator Left Support 20
C125 (Diesel) BK Left Rear of Engine Compartment 3
BR/BE8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 1
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
C126 (Diesel) GY Left Rear of Engine Compartment 3
C129 BK Above Left Front Body Cushion 20, 29
C130 At Power Distribution Center 1, 3
C134 BK Left Cowl 30, 33, 35
C203 Left Cowl 30, 33
C205 Instrument Panel Center Support N/S
C206 Left Cowl 25, 30, 33
C237 Bottom Right of Instrument Panel 30, 34
C303 BK Below Driver's Seat 23
C308 Center Rear of Headliner N/S
C329 BK Below Right Tail Lamp 27
C333 BK Below Left Tail Lamp 27
C342 BK Left Rear of Frame 27
C343 BK Left Rear of Frame 27
C344 (Dual Rear Wheels) BK Left Rear of Frame N/S
C345 Right Door N/S
C346 Right Door N/S
C347 Left Door 25
C348 Left Door 25
C352 WT Left A-Pillar 25
C353 WT Right A-Pillar 25
C358 NAT Left Side Instrument Panel 25, 30, 33, 35
C359 Heated Seat To Body Wiring 23
C360 Below Driver's Seat 23
C361 Left Rear Speaker Wiring N/S
C364 Right Rear Speaker Wiring N/S
C365 Under Passenger Power Seat N/S
Camshaft Position Sensor
(V8)GY Near of Distributor 5
Camshaft Position Sensor
(V10)GY Front of Engine 8
Camshaft Position Sensor
(Diesel)Left Front of Engine 13
Cargo Lamp No. 1 BK Rear of Lamp N/S
Cargo Lamp No. 2 BK Rear of Lamp N/S
Center High Mounted Stop
Lamp No. 1BK Rear of Cab 23
Center High Mounted Stop
Lamp No. 2BK Rear of Cab 23
Center Identification Lamp BK Behind Front of Headliner 25
Central Timer Module C1 Left Side Under Instrument Panel 30, 32
Central Timer Module C2 Left Side Under Instrument Panel 30, 32
Cigar Lighter NAT Center of Instrument Panel 33
8W - 91 - 2 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONBR/BE
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Clockspring C1 Steering Column 32
Clockspring C2 Steering Column 32
Clockspring C3 Steering Column 32
Clutch Pedal Position Switch
(M/T)BK Top of Clutch Pedal 35
Controller Anti-Lock Brake C1 BK Left Fender Side Shield 18
Controller Anti-Lock Brake C2
(ABS)BK Left Fender Side Shield 18
Crankshaft Position Sensor
(V8)BK Rear of Engine Block 5
Crankshaft Position Sensor
(V10GY Right Side of Engine Block 8
Cummins Bus (-) Left Front of Engine 13
Cup Holder Lamp BK Center of Instrument Panel 30, 34
Data Link Connector BK Left Bottom of Instrument Panel 30, 32
Day/Night Mirror BK Day/Night Mirror N/S
Daytime Running Lamp
ModuleBK Left Fender Side Shield 18
Dome Lamp BK Rear of Cab 23
Driver Airbag YL Steering Wheel N/S
Driver Cylinder Lock Switch BK In Door 24
Driver Door Ajar Switch NAT Door Jamb N/S
Driver Door Lock Motor BK In Door 24
Driver Door Window/Lock
SwitchBL In Door 24
Driver Heated Seat Cushion BL Under Seat N/S
Driver Heated Seat Switch RD Center of Instrument Panel N/S
Driver Lumbar Motor Under Seat N/S
Driver Power Seat Front
Vertical MotorBK Under Seat N/S
Driver Power Seat Horizontal
MotorBK Under Seat N/S
Driver Power Seat Rear
Vertical MotorBK Under Seat N/S
Driver Power Seat Switch At Seat N/S
Driver Power Window Motor In Door 24
EVAP/Purge Solenoid BK Right Fender Side Shield 22
Electric Brake Provision Bottom Left of Instrument Panel N/S
Engine Control Module
(Diesel)Left Side Engine 15
Engine Coolant Temperature
Sensor (Diesel)BK Left Front of Cylinder Head (Diesel) 13
Engine Coolant Temperature
Sensor (Gas)BK On Thermostat Housing 5, 8
BR/BE8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 3
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Engine Oil Pressure Sensor
(V8)BK Near Distributor 5
Engine Oil Pressure Sensor
(V10)Near Oil Filter 8
Engine Oil Pressure Sensor
(Diesel)Left Side of Engine 15
Fuel Heater (Diesel) Left Side of Engine 13
Fuel Injection Pump (Diesel) Left Side of Engine, Below ECM 13
Fuel Injector No.1 BK At Fuel Injector 7
Fuel Injector No. 2 BK At Fuel Injector 7, 8
Fuel Injector No. 3 BK At Fuel Injector 7, 8
Fuel Injector No. 4 BK At Fuel Injector 7, 8
Fuel Injector No. 5 BK At Fuel Injector 7, 8
Fuel Injector No. 6 BK At Fuel Injector 7, 8
Fuel Injector No. 7 BK At Fuel Injector 7, 8
Fuel Injector No. 8 BK At Fuel Injector 7, 8
Fuel Injector No. 9 BK At Fuel Injector 8
Fuel Injector No. 10 BK At Fuel Injector 8
Fuel Pump Module (Gas) LTGY At Frame Rail 29
Fuel Tank Module (Diesel) LTGY At Frame Rail N/S
Fuel Transfer Pump (Diesel) Left Rear of Engine Bottom of Pump 13
Generator BK Front of Engine 10, 11
Glove Box Lamp At Glove Box 30
Headlamp Switch C1 BK Left Side of Instrument Panel 30, 34
Headlamp Switch C2 Left Side of Instrument Panel 30, 34
Heated Mirror Switch Center of Instrument Panel 33
High Note Horn BK Front Bumper Right Support 22
Idle Air Control Motor BK On Throttle Body 12
Ignition Coil (5.9L) GY Right Front of Engine 7, 12
Ignition Coil 4 Pack (8.0L) BK Right Side of Engine 12
Ignition Coil 6 Pack (8.0L) BK Right Side of Engine 12
Ignition Switch C1 BK Steering Column 32
Ignition Switch C2 GY Steering Column 32
Instrument Cluster C1 Rear of Instrument Cluster 30
Instrument Cluster C2 Rear of Instrument Cluster 30
Intake Air Heater Relay
(Diesel)Left Fender Side Shield 21
Intake Air Temperature
Sensor (Diesel)Left Rear of Engine 13
Intake Air Temperature
Sensor (Gas)BK On Intake Manifold 7, 8
Joint Connector No. 1 In Power Distribution Center N/S
Joint Connector No. 2 In Power Distribution Center N/S
8W - 91 - 4 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONBR/BE
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Joint Connector No. 5 NAT Left Side of Instrument Panel 32
Joint Connector No. 6 NAT Left Side of Instrument Pane 32
Joint Connector No. 7 NAT Left Side of Instrument Pane 32
Joint Connector No. 8 NAT Center of Instrument Panel 30
Junction Block C1 BL Left Cowl 35
Junction Block C2 NAT Left Cowl 35
Junction Block C3 Left Cowl 25
Junction Block C4 BR Left Cowl 33
Junction Block C5 GN Left Cowl 33
Junction Block C6 BK Left Cowl 33
Junction Block C7 LTGY Left Cowl 33
Junction Block C8 OR Left Cowl 33
Junction Block C9 NAT Left Cowl N/S
Leak Detection Pump (Gas) BK Right Fender Side Shield 22
Left Back-Up Lamp GY Rear of Lamp N/S
Left Fog Lamp WT Rear of Fog Lamp N/S
Left Front Door Speaker
(Premium)BK In Door 24
Left Front Door Speaker
(Standard)BK In Door 24
Left Front Fender Lamp BK On Fender N/S
Left Front Wheel Speed
Sensor (ABS)BK Left Fender Side Shield 18
Left Headlamp BL At Headlamp N/S
Left License Lamp BK At Rear Bumper N/S
Left Outboard Clearance
LampBK Behind Front of Headliner 25
Left Outboard Headlamp BL At Headlamp N/S
Left Outboard Identification
LampBK Behind Front of Headliner 25
Left Park/Turn Signal Lamp BK At Lamp N/S
Left Power Mirror BK In Door 24
Left Rear Fender Lamp BK On Fender N/S
Left Rear Speaker (Premium) BK At B Pillar 23
Left Rear Speaker (Standard) At B Pillar 23
Left Rear Door Speaker In Door 23
Left Remote Radio Switch Steering Wheel N/S
Left Speed Control Switch Steering Wheel N/S
Left Tail/Stop Turn Signal
LampBK At Rear Bumper 27
Left Tweeter (Premium) Left A Pillar N/S
Left Visor/Vanity Lamp BK Left A-Pillar 25, 26
License Lamps BK Rear Bumper 27
BR/BE8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 5
CONNECTOR/GROUND/SPLICE LOCATION (Continued)
CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Low Note Horn BK Front Bumper Right Support 22
Manifold Absolute Pressure
Sensor (V8)BK On Throttle Body 7
Manifold Absolute Pressure
Sensor (V10)BK Top of Intake Manifold 12
Manifold Air Pressure Sensor
(Diesel)BK Rear of Intake Manifold 13
Multi-Function Switch On Steering Column 32
Output Speed Sensor DKBL Left Side of Transmission 16
Overdrive Switch On Shift Lever Arm N/S
Overhead Console BK Front of Headliner 25, 26
Oxygen Sensor 1/1 Left Bank
Up (5.9L HD/8.0L)Left Exhaust Manifold Downpipe N/S
Oxygen Sensor 1/1 Upstream
(A/T Except 8.0L)Catalytic Converter Inlet Side N/S
Oxygen Sensor 1/2
Downstream (A/T Except
8.0L)Catalytic Converter Outlet Side N/S
Oxygen Sensor 1/2 Left Bank
Down (California)Catalytic Converter Outlet Side N/S
Oxygen Sensor 1/2
Pre-catalyst (8.0L)Catalytic Converter Inlet Side N/S
Oxygen Sensor 1/3 Post
Catalyst (8.0L)Catalytic Converter Outlet Side N/S
Oxygen Sensor 2/1 Right
Bank Up (5.9L, 5.9HD, 8.0L,
CAL)Right Exhaust Manifold Downpipe N/S
Oxygen Sensor 2/2 Right
Bank Down (California)Catalytic Converter Outlet Side N/S
Oxygen Sensor 1/1 Left Bank
UpLeft Side of Engine N/S
Oxygen Sensor 1/1 Upstream
(M/T Except 8.0L)Catalytic Converter Outlet Side N/S
Park/Neutral Position Switch BK Left Side of Transmission 16
Passenger Airbag At Glove Box 30, 34
Passenger Airbag On/Off
Switch C1Lower Right Side of Instrument Panel 30, 33
Passenger Airbag On/Off
Switch C2Lower Right Side of Instrument Panel 30, 33
Passenger Cylinder Lock
SwitchLTGY In Door N/S
Passenger Door Ajar Switch NAT In Door N/S
Passenger Door Lock Motor BK In Door N/S
Passenger Door Window/
Lock SwitchIn Door N/S
8W - 91 - 6 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONBR/BE
CONNECTOR/GROUND/SPLICE LOCATION (Continued)