1998 DODGE RAM 1500 Trailer wiring

CAUTION: If the viscous fan drive is replaced
because of mechanical damage, the cooling fan
blades should also be inspected. Inspect for fatigue
cracks, loose blades, or loose rivets that could
have resulted from excessive vibration. Replace fan
blade assembly if any of these conditions are
found. Also inspect water pump bearing and shaft
assembly for any related damage due to a viscous
fan drive malfunction.
FAN DRIVE VISCOUS CLUTCH
- 5.9L DIESEL
DESCRIPTION
The electronically controlled viscous fan drive (Fig.
34) and (Fig. 33)is attached to the fan drive pulley
mounted to the engine. The coupling allows the fan
to be driven in a normal manner. The fan speed is
controlled by the electronic control module.
OPERATION
The Engine Control Module (ECM) controls the
level of engagement of the electronically controlled
viscous fan clutch by monitoring coolant tempera-
ture, intake manifold temperature, and air condition-
ing status. Based on cooling requirements, the ECMsends a signal to the viscous fan clutch to increase or
decrease the fan speed.
Fan speed is monitored by the ECM. Fan speeds
above or below a calibrated threshold will set a DTC.
Circuit concerns will also set fan clutch DTC's.
DIAGNOSIS AND TESTING - ELECTRONICALLY
CONTROLLED VISCOUS FAN DRIVE
NOISE
NOTE: It is normal for fan noise to be louder (roar-
ing) when:
²Fan duty cycle high. This may occur when ambi-
ent (outside air temperature) is very high.
²Engine loads and temperatures are high such as
when towing a trailer.
²Aggressive engine braking down a steep grade
where transmission temperatures may be high
²Cool silicone fluid within the fan drive unit is
being redistributed back to its normal disengaged
(warm) position. This can occur during the first 15
seconds to one minute after engine start-up on a cold
engine.
Fig. 33 Electronically Controlled Viscous Drive
1 - ELECTRONICALLY CONTROLLED VISCOUS FAN DRIVE
2 - MOUNTING NUT
3 - WIRING SUPPORT BRACKET
4 - ELECTRICAL CONNECTOR
Fig. 34 Fan Blade/Viscous Fan Drive - 5.9L Diesel
Engine
1 - ELECTRICAL CONNECTOR
2 - VISCOUS FAN DRIVE
3 - FAN BLADE
4 - BOLT (6)
5 - RADIATOR FAN PULLEY
7 - 52 ENGINEDR
FAN DRIVE VISCOUS CLUTCH-GAS ENGINES (Continued)

MARKER LAMP UNIT
REMOVAL
REMOVAL - FENDER MARKER LAMP......17
REMOVAL - TAILGATE MARKER LAMP.....18
INSTALLATION
INSTALLATION - FENDER MARKER LAMP . . 18
INSTALLATION - TAILGATE MARKER LAMP . 18
MULTI-FUNCTION SWITCH
DESCRIPTION - TURN SIGNAL SYSTEM.....18
OPERATION - TURN SIGNAL SYSTEM.......18
DIAGNOSIS AND TESTING - MULTI-
FUNCTION SWITCH...................18
REMOVAL.............................19
INSTALLATION.........................19
PARK LAMP RELAY
DESCRIPTION.........................20
OPERATION...........................20
DIAGNOSIS AND TESTING - PARK LAMP
RELAY..............................20
REMOVAL.............................21
INSTALLATION.........................21
PARK/TURN SIGNAL LAMP
REMOVAL.............................21
INSTALLATION.........................21
TAIL LAMP
REMOVAL
REMOVAL - WITH CARGO BOX..........22REMOVAL - WITHOUT CARGO BOX.......22
INSTALLATION
INSTALLATION - WITH CARGO BOX.......22
INSTALLATION - WITHOUT CARGO BOX . . . 22
TAIL LAMP UNIT
REMOVAL
REMOVAL - WITH CARGO BOX..........22
REMOVAL - WITHOUT CARGO BOX.......23
INSTALLATION
INSTALLATION - WITH CARGO BOX.......23
INSTALLATION - WITHOUT CARGO BOX . . . 23
TRAILER TOW WIRING
DESCRIPTION.........................24
TURN LAMP
REMOVAL
REMOVAL - WITH CARGO BOX..........24
REMOVAL - WITHOUT CARGO BOX.......24
INSTALLATION
INSTALLATION - WITH CARGO BOX.......24
INSTALLATION - WITHOUT CARGO BOX . . . 24
UNDERHOOD LAMP
REMOVAL.............................25
INSTALLATION.........................25
UNDERHOOD LAMP UNIT
REMOVAL.............................25
INSTALLATION.........................25
LAMPS/LIGHTING - EXTERIOR
DESCRIPTION
The exterior lighting system for this model include
the following components:
²Backup Lamps
²Brake Lamps
²Daytime Running Lamps
²Front Fog Lamps
²Hazard Warning Lamps
²Headlamps
²Park Lamps
²Turn Signal Lamps
Other components of the exterior lighting system
for this model include:
²Backup Lamp Switch
²Brake Lamp Switch
²Front Control Module
²Front Fog Lamp Relay
²Hazard Switch
²Multi-Function Switch
²Park Lamp Relay
²Trailer Tow Connectors
Some of the interior and exterior lighting functions
are governed by the front control module. The head-
lamp, dome, and door ajar switchs provide signals to
the instrument cluster. The instrument cluster sends
a J1850 message to the front control module to
enable the necessary components for illumination.Hard wired circuitry connects the exterior lighting
system components to the electrical system of the
vehicle. Refer to the appropriate wiring information.OPERATION
DAYTIME RUNNING LAMPS
Power is reduced using pulse-width modulation to
the high beams, where by the power is switched on
and off rapidly instead of remaining on continuously.
The duration and interval of the power pulses is pro-
grammed into the Front Control Module (FCM).
HEADLAMP SYSTEM
The instrument cluster monitors both the multi-
plexed headlamp and multifunction switches. The
instrument cluster transmits a J1850 bus message to
the front control module (FCM) to activate the head-
lamps. The headlamp system will default to head-
lamps ON position when ignition switch is ON and
when an open or short circuit failure occurs on the
headlamp switch input to the instrument cluster. The
system will return to normal operation when the
open or short is repaired. A fault will be reported by
the Instrument Cluster when a failure occurs on the
dimmer or headlamp switch input.
If the exterior lamps are ON, and the headlamp
switch is in any position other than OFF, with the
ignition switch OFF (LOCK) after 5 minutes, the
8L - 2 LAMPS/LIGHTING - EXTERIORDR

TRAILER TOW WIRING
DESCRIPTION
Vehicles equipped with an optional factory-in-
stalled trailer towing package have a rear body wire
harness that includes an integral trailer tow wiring
take out that connects to a heavy duty, sealed, 7-pin
trailer tow connector located in the rear bumper (Fig.
23). This harness includes an adapter harness that
adapts the 7-pin trailer tow connector to a standard,
light-duty, 4-pin trailer tow connector. Refer to the
appropriate wiring information.
TURN LAMP
REMOVAL
REMOVAL - WITH CARGO BOX
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the tail lamp unit (Refer to 8 - ELEC-
TRICAL/LAMPS/LIGHTING - EXTERIOR/TAIL
LAMP UNIT - REMOVAL).
(3) Remove the lamp back plate from the tail lamp
unit.
(4) Release the turn signal bulb locking tabs and
remove the bulb from the back plate.
REMOVAL - WITHOUT CARGO BOX
(1) Disconnect and isolate the negative battery
cable.(2) Remove the four screws that secure the tail
lamp lens to the tail lamp housing (Fig. 24).
(3) Separate the tail lamp lens from the tail lamp
housing.
(4) Push the turn signal bulb inward and rotate it
counter-clockwise.
(5) Remove the turn signal bulb from the tail lamp
socket.
INSTALLATION
INSTALLATION - WITH CARGO BOX
(1) Install the turn signal bulb into the lamp back
plate.
(2) Install the lamp back plate onto the tail lamp
unit.
(3) Install the tail lamp unit (Refer to 8 - ELEC-
TRICAL/LAMPS/LIGHTING - EXTERIOR/TAIL
LAMP UNIT - INSTALLATION).
(4) Reconnect the negative battery cable.
INSTALLATION - WITHOUT CARGO BOX
(1) Install the turn signal bulb into the tail lamp
socket by pushing inward and rotating it clockwise.
NOTE: Install the tail lamp lens with the clear por-
tion (back-up lens) at the top of the housing. Make
sure that the gasket is correctly in place and not
twisted or torn.
(2) Position the tail lamp lens and gasket onto the
tail lamp unit.
NOTE: Do not overtighten the tail lamp lens screws
or damage to the tail lamp lens may result.
(3) Install the four screws that secure the tail
lamp lens to the tail lamp unit. Tighten the screws
securely.
(4) Reconnect the negative battery cable.
Fig. 23 Trailer Tow Wiring
1 - RETAINER CLIP (4)
2 - REAR BODY HARNESS (TRAILER TOW TAKE OUT)
3 - RETAINER CLIP (2)
4 - WIRE HARNESS CONNECTOR
Fig. 24 Tail Lamp Lens
8L - 24 LAMPS/LIGHTING - EXTERIORDR

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
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.................. 8W-42-1
AIRBAG SYSTEM.................... 8W-43-1
INTERIOR LIGHTING.................. 8W-44-1AUDIO 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
NAVIGATION/TELECOMMUNICATION..... 8W-55-1
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/SPLICE
LOCATION........................ 8W-91-1
POWER DISTRIBUTION............... 8W-97-1 DRWIRING 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 INFORMATIONDR
WIRING DIAGRAM INFORMATION (Continued)

HEATED SEAT MODULE - INSTALLATION . . . 8E-7
HEATED SEAT MODULE - INSTALLATION . . 8G-15
HEATED SEAT MODULE - OPERATION.....8E-6
HEATED SEAT MODULE - OPERATION....8G-14
HEATED SEAT MODULE - REMOVAL.......8E-7
HEATED SEAT MODULE - REMOVAL.....8G-15
HEATED SEAT SENSOR - DESCRIPTION . . . 8G-11
HEATED SEAT SENSOR - DIAGNOSIS
AND TESTING.......................8G-11
HEATED SEAT SENSOR - OPERATION....8G-11
HEATED SEAT SENSOR - REMOVAL......8G-11
HEATED SEAT SWITCH - DESCRIPTION . . . 8G-11
HEATED SEAT SWITCH - DIAGNOSIS
AND TESTING.......................8G-12
HEATED SEAT SWITCH - INSTALLATION . . 8G-13
HEATED SEAT SWITCH - OPERATION.....8G-12
HEATED SEAT SWITCH - REMOVAL......8G-13
HEATED SEAT SYSTEM - DESCRIPTION....8G-7
HEATED SEAT SYSTEM - DIAGNOSIS
AND TESTING........................8G-8
HEATED SEAT SYSTEM - OPERATION.....8G-8
HEATER - 5.9L DIESEL - DESCRIPTION,
ENGINE BLOCK.......................7-37
HEATER - 5.9L DIESEL - INSTALLATION,
ENGINE BLOCK.......................7-38
HEATER - 5.9L DIESEL - OPERATION,
ENGINE BLOCK.......................7-38
HEATER - 5.9L DIESEL - REMOVAL,
ENGINE BLOCK.........................7-38
HEATER - DESCRIPTION, ENGINE BLOCK . . . 7-36
HEATER - DESCRIPTION, FUEL..........14-51
HEATER - DESCRIPTION, INTAKE AIR.....14-80
HEATER - DIAGNOSIS AND TESTING,
ENGINE BLOCK.......................7-36
HEATER - DIAGNOSIS AND TESTING,
FUEL..............................14-52
HEATER - INSTALLATION, ENGINE
BLOCK..............................7-37
HEATER - INSTALLATION, INTAKE AIR....14-80
HEATER - OPERATION, ENGINE BLOCK....7-36
HEATER - OPERATION, FUEL............14-51
HEATER - OPERATION, INTAKE AIR......14-80
HEATER - REMOVAL, ENGINE BLOCK......7-37
HEATER - REMOVAL, INTAKE AIR........14-80
HEATER AND AIR CONDITIONER -
DESCRIPTION........................24-1
HEATER AND AIR CONDITIONER -
OPERATION..........................24-1
HEATER CONTROL - DESCRIPTION, A/C . . . 24-14
HEATER CONTROL - INSTALLATION, A/C . . 24-15
HEATER CONTROL - REMOVAL, A/C......24-15
HEATER CORE - DESCRIPTION..........24-63
HEATER CORE - INSTALLATION.........24-63
HEATER CORE - OPERATION............24-63
HEATER CORE - REMOVAL.............24-63
HEATER INLET HOSE - INSTALLATION....24-64
HEATER INLET HOSE - REMOVAL........24-64
HEATER PERFORMANCE TEST -
DIAGNOSIS AND TESTING..............24-6
HEATER RELAY - DESCRIPTION, FUEL....14-52
HEATER RELAY - DESCRIPTION, INTAKE
AIR ...............................14-82
HEATER RELAY - INSTALLATION, FUEL . . . 14-53
HEATER RELAY - INSTALLATION, INTAKE
AIR ...............................14-82
HEATER RELAY - OPERATION, FUEL......14-52
HEATER RELAY - OPERATION, INTAKE
AIR ...............................14-82
HEATER RELAY - REMOVAL, FUEL.......14-52
HEATER RELAY - REMOVAL, INTAKE AIR . . 14-82
HEATER RETURN HOSE - INSTALLATION . . 24-65
HEATER RETURN HOSE - REMOVAL......24-64
HEIGHT ADJUSTMENT - 4WD (LD) -
STANDARD PROCEDURE.................2-3
HEIGHT MEASUREMENT - 4WD (LD) -
STANDARD PROCEDURE.................2-3
HEMI ENGINE - INSTALLATION, 3.7L/4.7L
AND 5.7L......................24-59,24-73
HEMI ENGINE - REMOVAL, 3.7L/4.7L
AND 5.7L......................24-57,24-71
HIGH BEAM INDICATOR - DESCRIPTION
. . 8J-28
HIGH BEAM INDICATOR - OPERATION
....8J-28
HIGH MOUNTED STOP LAMP -
INSTALLATION, CENTER
...............8L-11
HIGH MOUNTED STOP LAMP -
REMOVAL, CENTER
...................8L-11
HIGH MOUNTED STOP LAMP UNIT -
INSTALLATION, CENTER
...............8L-11HIGH MOUNTED STOP LAMP UNIT -
REMOVAL, CENTER...................8L-11
HIGH PRESSURE RELIEF VALVE -
DESCRIPTION.......................24-48
HIGH PRESSURE RELIEF VALVE -
OPERATION.........................24-48
HIGH SPEEDS - DESCRIPTION, TIRE
PRESSURE..........................22-7
HIGH/LOW RELAY - DESCRIPTION,
WIPER.............................8R-20
HIGH/LOW RELAY - DIAGNOSIS AND
TESTING, WIPER.....................8R-21
HIGH/LOW RELAY - INSTALLATION,
WIPER.............................8R-22
HIGH/LOW RELAY - OPERATION, WIPER . . 8R-20
HIGH/LOW RELAY - REMOVAL, WIPER . . . 8R-21
HIGH-PRESSURE FUEL LINE LEAKS -
DIAGNOSIS AND TESTING.............14-58
HINGE - INSTALLATION.....23-16,23-22,23-31,
23-46
HINGE - INSTALLATION, CENTER SEAT
BACK..............................23-79
HINGE - REMOVAL....23-16,23-22,23-31,23-46
HINGE - REMOVAL, CENTER SEAT BACK . . 23-78
HINGE COVER - INSTALLATION, CENTER
SEAT BACK INERTIA..................23-77
HINGE COVER - REMOVAL, CENTER
SEAT BACK INERTIA..................23-77
HITCH - INSTALLATION, TRAILER........13-25
HITCH - REMOVAL, TRAILER...........13-25
HOAT COOLANT - DESCRIPTION..........7-32
HOISTING - STANDARD PROCEDURE......0-20
HOLDDOWN - DESCRIPTION, BATTERY . . . 8F-14
HOLDDOWN - INSTALLATION, BATTERY . . . 8F-14
HOLDDOWN - OPERATION, BATTERY.....8F-14
HOLDDOWN - REMOVAL, BATTERY......8F-14
HOLDER - INSTALLATION, CUP.........23-51
HOLDER - REMOVAL, CUP.............23-51
HOLDING CLUTCHES - DESCRIPTION....21-371
HOLDING CLUTCHES - OPERATION.....21-372
HOLE PLUG - INSTALLATION, CAMSHAFT
CORE..............................9-206
HOLE PLUG - REMOVAL, CAMSHAFT
CORE..............................9-205
HOLE REPAIR - DESCRIPTION,
THREADED........................Intro.-8
HONING - STANDARD PROCEDURE,
CYLINDER BORE.................9-128,9-38
HOOD - INSTALLATION................23-47
HOOD - REMOVAL....................23-46
HOOK - INSTALLATION, COAT...........23-66
HOOK - REMOVAL, COAT..............23-66
HOOK ASSEMBLY - INSTALLATION,
FRONT TOW........................13-23
HOOK ASSEMBLY - REMOVAL, FRONT
TOW ..............................13-23
HORN - DIAGNOSIS AND TESTING.......8H-1
HORN - INSTALLATION.................8H-2
HORN - REMOVAL....................8H-2
HORN SWITCH - DESCRIPTION..........8H-2
HORN SWITCH - DIAGNOSIS AND
TESTING............................8H-2
HORN SYSTEM - DESCRIPTION..........8H-1
HORN SYSTEM - DIAGNOSIS AND
TESTING............................8H-1
HORN SYSTEM - OPERATION............8H-1
HOSE - GEAR TO COOLER -
INSTALLATION, RETURN..........19-44,19-45
HOSE - GEAR TO COOLER - REMOVAL,
RETURN......................19-44,19-45
HOSE - INSTALLATION, FRONT BRAKE.....5-13
HOSE - INSTALLATION, HEATER INLET....24-64
HOSE - INSTALLATION, HEATER RETURN . 24-65
HOSE - INSTALLATION, PRESSURE . 19-44,19-45
HOSE - INSTALLATION, REAR BRAKE......5-12
HOSE - REMOVAL, FRONT..............5-12
HOSE - REMOVAL, HEATER INLET.......24-64
HOSE - REMOVAL, HEATER RETURN.....24-64
HOSE - REMOVAL, PRESSURE.....19-44,19-45
HOSE - REMOVAL, REAR BRAKE
.........5-11
HOSE - RESERVOIR TO COOLER -
INSTALLATION, RETURN
..........19-44,19-45
HOSE - RESERVOIR TO COOLER -
REMOVAL, RETURN
.............19-44,19-45
HOSE ASSEMBLY - INSTALLATION, REAR
TUBE
...............................5-13
HOSE ASSEMBLY - REMOVAL, REAR
TUBE
...............................5-12HOSE CLAMPS - DESCRIPTION...........7-3
HOSE CLAMPS - OPERATION.............7-5
HOSES/TUBES - DESCRIPTION, WASHER . 8R-11
HOSES/TUBES - OPERATION, WASHER . . . 8R-11
HOUSING - ASSEMBLY, HVAC...........24-35
HOUSING - DIAGNOSIS AND TESTING,
CLUTCH..............................6-7
HOUSING - DISASSEMBLY, HVAC........24-35
HOUSING - INSTALLATION, CLUTCH.......6-9
HOUSING - INSTALLATION, GEAR........9-300
HOUSING - INSTALLATION, HVAC........24-36
HOUSING - INSTALLATION, ROCKER.....9-255
HOUSING - REMOVAL, CLUTCH...........6-9
HOUSING - REMOVAL, GEAR...........9-299
HOUSING - REMOVAL, HVAC...........24-34
HOUSING - REMOVAL, ROCKER.........9-255
HOUSING BUSHING AND SEAL -
INSTALLATION, EXTENSION...........21-440
HOUSING BUSHING AND SEAL -
REMOVAL, EXTENSION...............21-440
HOUSING COVER - INSTALLATION, GEAR . 9-301
HOUSING COVER - REMOVAL, GEAR.....9-301
HOUSING FLUID LEAK - DIAGNOSIS AND
TESTING, CONVERTER.........21-144,21-318
HOUSING SEAL - INSTALLATION,
ADAPTER...............21-128,21-364,21-85
HOUSING SEAL - INSTALLATION,
EXTENSION . 21-128,21-201,21-507,21-536,21-85
HOUSING SEAL - REMOVAL, ADAPTER . . 21-128,
21-364,21-85
HOUSING SEAL - REMOVAL,
EXTENSION . 21-128,21-201,21-507,21-536,21-85
HOUSING SEAL AND DUST BOOT -
INSTALLATION, EXTENSION.....21-476,21-571
HOUSING SEAL AND DUST BOOT -
REMOVAL, EXTENSION.........21-476,21-571
HOW TO USE WIRING DIAGRAMS -
DESCRIPTION.....................8W-01-1
H-SECTION REPLACEMENT - STANDARD
PROCEDURE, REAR FRAME............13-13
HUB / BEARING - INSTALLATION.........2-32
HUB / BEARING - REMOVAL.............2-31
HVAC HOUSING - ASSEMBLY...........24-35
HVAC HOUSING - DISASSEMBLY........24-35
HVAC HOUSING - INSTALLATION........24-36
HVAC HOUSING - REMOVAL............24-34
HYDRAULIC BOOSTER - DIAGNOSIS
AND TESTING........................5-30
HYDRAULIC LASH ADJUSTER -
DIAGNOSIS AND TESTING.........9-125,9-32
HYDRAULIC PRESSURE TEST -
DIAGNOSIS AND TESTING......21-141,21-316
HYDRAULIC SCHEMATICS, SCHEMATICS
AND DIAGRAMS..............21-176,21-337
HYDRAULIC TAPPETS - DIAGNOSIS AND
TESTING...........................9-210
HYDRAULIC TAPPETS - INSTALLATION . . . 9-211
HYDRAULIC TAPPETS - REMOVAL.......9-211
HYDROBOOST - INSTALLATION..........5-27
HYDROBOOST - INSTALLATION, ALL
EXCEPT.............................5-27
HYDROBOOST - REMOVAL..............5-26
HYDROBOOST - REMOVAL, ALL EXCEPT . . . 5-26
HYDRO-BOOST BRAKE BOOSTER -
INSTALLATION........................5-32
HYDRO-BOOST BRAKE BOOSTER -
REMOVAL
...........................5-31
HYDROFORM FENDER RAIL REPAIR -
STANDARD PROCEDURE
...............13-11
HYDROSTATIC LOCK - STANDARD
PROCEDURE
...................9-190,9-240
IDENTIFICATION - DESCRIPTION,
FASTENER
.........................Intro.-5
IDENTIFICATION AND INFORMATION -
DESCRIPTION, SECTION
.............8W-01-6
IDENTIFICATION NUMBER -
DESCRIPTION, VEHICLE
..............Intro.-1
IDLE AIR CONTROL MOTOR -
DESCRIPTION
.......................14-28
IDLE AIR CONTROL MOTOR -
INSTALLATION
.......................14-29
IDLE AIR CONTROL MOTOR -
OPERATION
.........................14-28
IDLE AIR CONTROL MOTOR - REMOVAL
. . 14-29
IDLER SHAFT - INSTALLATION
......9-179,9-81
IDLER SHAFT - REMOVAL
..........9-179,9-81
IGNITION - SPECIFICATIONS, TORQUE
.....8I-3
16 INDEXDR
Description Group-Page Description Group-Page Description Group-Page

TOOLS - POWER DISTRIBUTION
SYSTEMS, SPECIAL................8W-97-2
TOOLS - POWER STEERING GEAR,
SPECIAL...........................19-23
TOOLS - RE TRANSMISSION, SPECIAL . . 21-191
TOOLS - RFE TRANSMISSION, SPECIAL . . 21-359
TOOLS - STEERING LINKAGE, SPECIAL . . . 19-35
TOOLS - STEERING, SPECIAL............19-5
TOOLS - TRANSFER CASE NV271/NV273,
SPECIAL....................21-474,21-569
TOOLS - WHEEL ALIGNMENT, SPECIAL.....2-7
TOOLS - WIRING/TERMINAL, SPECIAL . 8W-01-10
TOOLS, FRONT AXLE - 9 1/4 AA -
SPECIAL............................3-64
TOOLS, FRONT AXLE - C205F - SPECIAL . . . 3-40
TOOLS, HALF SHAFT - SPECIAL..........3-21
TOOLS, MANUAL TRANSMISSION -
NV3500 - SPECIAL...................21-40
TOOLS, MANUAL TRANSMISSION -
NV4500 - SPECIAL...................21-81
TOOLS, MANUAL TRANSMISSION -
NV5600 - SPECIAL..................21-123
TOOLS, PROPELLER SHAFT - SPECIAL.....3-6
TOOLS, REAR AXLE - 10 1/2 AA -
SPECIAL...........................3-120
TOOLS, REAR AXLE - 11 1/2 AA -
SPECIAL...........................3-148
TOOLS, REAR AXLE - 9 1/4 - SPECIAL.....3-90
TOP COVER - INSTALLATION,
INSTRUMENT PANEL..................23-59
TOP COVER - REMOVAL, INSTRUMENT
PANEL.............................23-58
TORSION BAR - DESCRIPTION...........2-26
TORSION BAR - INSTALLATION..........2-27
TORSION BAR - OPERATION.............2-26
TORSION BAR - REMOVAL..............2-26
TORSION BAR CROSS MEMBER
BUSHING - INSTALLATION..............2-15
TORSION BAR CROSSMEMBER
BUSHING - REMOVAL..................2-13
TOUCH-UP - DESCRIPTION, PAINT.......23-74
TOUCH-UP - STANDARD PROCEDURE,
PAINT.............................23-74
TOW HOOK ASSEMBLY - INSTALLATION,
FRONT.............................13-23
TOW HOOK ASSEMBLY - REMOVAL,
FRONT.............................13-23
TOW WIRING - DESCRIPTION, TRAILER . . 8L-24
TOW/HAUL INDICATOR - DESCRIPTION . . . 8J-39
TOW/HAUL INDICATOR - OPERATION.....8J-39
TOW/HAUL OVERDRIVE SWITCH -
DESCRIPTION................21-261,21-392
TOW/HAUL OVERDRIVE SWITCH -
INSTALLATION................21-262,21-393
TOW/HAUL OVERDRIVE SWITCH -
OPERATION..................21-262,21-392
TOW/HAUL OVERDRIVE SWITCH -
REMOVAL...................21-262,21-392
TOWING - STANDARD PROCEDURE.......0-21
TRACK - DESCRIPTION, POWER SEAT....8N-16
TRACK - DIAGNOSIS AND TESTING,
POWER SEAT.......................8N-17
TRACK - INSTALLATION, POWER SEAT . . . 8N-17
TRACK - INSTALLATION, SEAT..........23-83
TRACK - OPERATION, POWER SEAT.....8N-16
TRACK - REMOVAL, POWER SEAT.......8N-17
TRACK - REMOVAL, SEAT..............23-83
TRACK BAR - INSTALLATION...........19-38
TRACK BAR - REMOVAL...............19-38
TRAC-RITE - ASSEMBLY, DIFFERENTIAL . . 3-133,
3-161
TRAC-RITE - CLEANING, DIFFERENTIAL . . 3-132,
3-160
TRAC-RITE - DESCRIPTION,
DIFFERENTIAL..................3-131,3-158
TRAC-RITE - DISASSEMBLY,
DIFFERENTIAL..................3-131,3-158
TRAC-RITE - INSPECTION, DIFFERENTIAL . 3-132,
3-160
TRAC-RITE - OPERATION, DIFFERENTIAL . 3-131,
3-158
TRAILER HITCH - INSTALLATION
........13-25
TRAILER HITCH - REMOVAL
............13-25
TRAILER TOW WIRING - DESCRIPTION
. . . 8L-24
TRANS COOLER - 5.9L DIESEL -
DESCRIPTION
........................7-68
TRANS COOLER - 5.9L DIESEL -
OPERATION
..........................7-69TRANS COOLER - DESCRIPTION.........7-67
TRANS COOLER - INSTALLATION.........7-68
TRANS COOLER - OPERATION...........7-67
TRANS COOLER - REMOVAL.............7-68
TRANS TEMP INDICATOR -
DESCRIPTION.......................8J-40
TRANS TEMP INDICATOR - OPERATION . . . 8J-40
TRANSDUCER - DESCRIPTION, A/C
PRESSURE.........................24-15
TRANSDUCER - DIAGNOSIS AND
TESTING, A/C PRESSURE..............24-16
TRANSDUCER - INSTALLATION, A/C
PRESSURE.........................24-16
TRANSDUCER - OPERATION, A/C
PRESSURE.........................24-16
TRANSDUCER - REMOVAL, A/C
PRESSURE.........................24-16
TRANSFER CASE - DESCRIPTION..........0-4
TRANSFER CASE - NV241 GENII -
ASSEMBLY.........................21-428
TRANSFER CASE - NV241 GENII -
CLEANING.........................21-426
TRANSFER CASE - NV241 GENII -
DESCRIPTION......................21-415
TRANSFER CASE - NV241 GENII -
DIAGNOSIS AND TESTING............21-416
TRANSFER CASE - NV241 GENII -
DISASSEMBLY......................21-417
TRANSFER CASE - NV241 GENII -
INSPECTION.......................21-426
TRANSFER CASE - NV241 GENII -
INSTALLATION.......................21-438
TRANSFER CASE - NV241 GENII -
OPERATION........................21-415
TRANSFER CASE - NV241 GENII -
REMOVAL.........................21-417
TRANSFER CASE - NV243 - ASSEMBLY . . 21-496
TRANSFER CASE - NV243 - CLEANING . . 21-493
TRANSFER CASE - NV243 -
DESCRIPTION......................21-482
TRANSFER CASE - NV243 - DIAGNOSIS
AND TESTING......................21-483
TRANSFER CASE - NV243 -
DISASSEMBLY......................21-484
TRANSFER CASE - NV243 - INSPECTION . 21-493
TRANSFER CASE - NV243 -
INSTALLATION......................21-505
TRANSFER CASE - NV243 - OPERATION . 21-483
TRANSFER CASE - NV243 - REMOVAL . . . 21-484
TRANSFER CASE - NV244 - DIAGNOSIS
AND TESTING......................21-513
TRANSFER CASE - NV244 GENII -
ASSEMBLY.........................21-525
TRANSFER CASE - NV244 GENII -
CLEANING.........................21-523
TRANSFER CASE - NV244 GENII -
DESCRIPTION......................21-512
TRANSFER CASE - NV244 GENII -
DISASSEMBLY......................21-514
TRANSFER CASE - NV244 GENII -
INSPECTION.......................21-523
TRANSFER CASE - NV244 GENII -
INSTALLATION......................21-534
TRANSFER CASE - NV244 GENII -
OPERATION........................21-513
TRANSFER CASE - NV244 GENII -
REMOVAL.........................21-514
TRANSFER CASE - NV271 - ASSEMBLY . . 21-461
TRANSFER CASE - NV271 - CLEANING . . 21-459
TRANSFER CASE - NV271 -
DESCRIPTION......................21-447
TRANSFER CASE - NV271 - DIAGNOSIS
AND TESTING......................21-448
TRANSFER CASE - NV271 -
DISASSEMBLY......................21-450
TRANSFER CASE - NV271 - INSPECTION . 21-459
TRANSFER CASE - NV271 -
INSTALLATION......................21-473
TRANSFER CASE - NV271 - OPERATION . 21-448
TRANSFER CASE - NV271 - REMOVAL . . . 21-450
TRANSFER CASE - NV273 - ASSEMBLY
. . 21-556
TRANSFER CASE - NV273 - CLEANING
. . 21-554
TRANSFER CASE - NV273 -
DESCRIPTION
......................21-542
TRANSFER CASE - NV273 - DIAGNOSIS
AND TESTING
......................21-543
TRANSFER CASE - NV273 -
DISASSEMBLY
......................21-544TRANSFER CASE - NV273 - INSPECTION . 21-554
TRANSFER CASE - NV273 -
INSTALLATION......................21-568
TRANSFER CASE - NV273 - OPERATION . 21-543
TRANSFER CASE - NV273 - REMOVAL . . . 21-544
TRANSFER CASE CONTROL MODULE -
DESCRIPTION.......................8E-16
TRANSFER CASE CONTROL MODULE -
OPERATION.........................8E-16
TRANSFER CASE, NV241 GENII........21-438
TRANSFER CASE, NV241/NV243........21-439
TRANSFER CASE, NV243.......21-505,21-506
TRANSFER CASE, NV244 GENII........21-535
TRANSFER CASE, NV271.............21-473
TRANSFER CASE NV271/NV273, SPECIAL
TOOLS......................21-474,21-569
TRANSFER CASE, NV273.............21-568
TRANSFER CASE SKID PLATE -
INSTALLATION.......................13-26
TRANSFER CASE SKID PLATE -
REMOVAL..........................13-26
TRANSFER PUMP - DESCRIPTION, FUEL . . 14-64
TRANSFER PUMP - INSTALLATION, FUEL . 14-65
TRANSFER PUMP - OPERATION, FUEL....14-64
TRANSFER PUMP - REMOVAL, FUEL.....14-64
TRANSMISSION - 45RFE/545RFE -
DESCRIPTION, AUTOMATIC............21-312
TRANSMISSION - 45RFE/545RFE -
OPERATION, AUTOMATIC.............21-313
TRANSMISSION - 48RE - DESCRIPTION,
AUTOMATIC........................21-132
TRANSMISSION - 48RE - OPERATION,
AUTOMATIC........................21-134
TRANSMISSION - CLEANING..........21-106
TRANSMISSION - DESCRIPTION,
MANUAL.............................0-4
TRANSMISSION - DIAGNOSIS AND
TESTING, AUTOMATIC..........21-140,21-314
TRANSMISSION - NV3500 - ASSEMBLY,
MANUAL...........................21-17
TRANSMISSION - NV3500 - CLEANING,
MANUAL...........................21-15
TRANSMISSION - NV3500 -
DESCRIPTION, MANUAL................21-1
TRANSMISSION - NV3500 - DIAGNOSIS
AND TESTING, MANUAL................21-3
TRANSMISSION - NV3500 -
DISASSEMBLY, MANUAL................21-4
TRANSMISSION - NV3500 -
INSPECTION, MANUAL................21-16
TRANSMISSION - NV3500 -
INSTALLATION, MANUAL..............21-39
TRANSMISSION - NV3500 - OPERATION,
MANUAL............................21-1
TRANSMISSION - NV3500 - REMOVAL,
MANUAL............................21-3
TRANSMISSION - NV3500 - SPECIAL
TOOLS, MANUAL.....................21-40
TRANSMISSION - NV3500 -
SPECIFICATIONS, MANUAL.............21-40
TRANSMISSION - NV4500 - ASSEMBLY,
MANUAL...........................21-63
TRANSMISSION - NV4500 - CLEANING,
MANUAL...........................21-62
TRANSMISSION - NV4500 -
DESCRIPTION, MANUAL...............21-43
TRANSMISSION - NV4500 - DIAGNOSIS
AND TESTING, MANUAL...............21-44
TRANSMISSION - NV4500 -
DISASSEMBLY, MANUAL...............21-46
TRANSMISSION - NV4500 -
INSPECTION, MANUAL................21-62
TRANSMISSION - NV4500 -
INSTALLATION, MANUAL..............21-80
TRANSMISSION - NV4500 - OPERATION,
MANUAL...........................21-43
TRANSMISSION - NV4500 - REMOVAL,
MANUAL...........................21-44
TRANSMISSION - NV4500 - SPECIAL
TOOLS, MANUAL
.....................21-81
TRANSMISSION - NV4500 -
SPECIFICATIONS, MANUAL
.............21-81
TRANSMISSION - NV5600 - ASSEMBLY,
MANUAL
..........................21-106
TRANSMISSION - NV5600 -
DESCRIPTION, MANUAL
...............21-88
TRANSMISSION - NV5600 - DIAGNOSIS
AND TESTING, MANUAL
...............21-90
34 INDEXDR
Description Group-Page Description Group-Page Description Group-Page

WATER PUMP BYPASS - DESCRIPTION....7-59
WATER PUMP BYPASS - OPERATION......7-60
WATER SEPARATOR - DESCRIPTION,
FUEL FILTER........................14-50
WATER SEPARATOR - INSTALLATION,
FUEL FILTER........................14-50
WATER SEPARATOR - OPERATION, FUEL
FILTER.............................14-50
WATER SEPARATOR - REMOVAL, FUEL
FILTER.............................14-50
WATER TO OIL COOLER - REMOVAL......7-69
WATERDAM - INSTALLATION......23-25,23-34
WATERDAM - REMOVAL..........23-25,23-34
WATER-IN-FUEL INDICATOR -
DESCRIPTION.......................8J-45
WATER-IN-FUEL INDICATOR -
OPERATION.........................8J-45
WATER-TO-AIR COOLER - INSTALLATION . . 7-70
WEAR - STANDARD PROCEDURE,
MEASURING TIMING CHAIN............9-167
WEAR INDICATORS - DIAGNOSIS AND
TESTING, TREAD......................22-8
WEAR PATTERNS - DIAGNOSIS AND
TESTING, TIRE.......................22-8
WEAR, STANDARD PROCEDURE -
MEASURING TIMING CHAIN.............9-77
WEATHERSTRIP - INSTALLATION, DRIP
RAIL..............................23-91
WEATHERSTRIP - INSTALLATION, FRONT
DOOR GLASS RUN...................23-92
WEATHERSTRIP - INSTALLATION, REAR
DOOR GLASS RUN.....................23-93
WEATHERSTRIP - REMOVAL, DRIP RAIL . . 23-91
WEATHERSTRIP - REMOVAL, FRONT
DOOR GLASS RUN...................23-92
WEATHERSTRIP - REMOVAL, REAR
DOOR GLASS RUN...................23-93
WEATHERSTRIP RETAINER -
INSTALLATION, A-PILLAR..............23-91
WEATHERSTRIP RETAINER -
INSTALLATION, DRIP RAIL.............23-92
WEATHERSTRIP RETAINER - REMOVAL,
A-PILLAR...........................23-91
WEATHERSTRIP RETAINER - REMOVAL,
DRIP RAIL..........................23-92
WELD LOCATIONS - SPECIFICATIONS . . . 23-120
WELD PROCESS - SPECIFICATIONS......13-15
WHEEL - INSTALLATION, STEERING
......19-15
WHEEL - REMOVAL, STEERING
.........19-15
WHEEL ALIGNMENT - DESCRIPTION
.......2-1
WHEEL ALIGNMENT - OPERATION
.........2-2
WHEEL ALIGNMENT, SPECIAL TOOLS
......2-7
WHEEL ANTILOCK - DIAGNOSIS AND
TESTING, REAR
.......................5-48
WHEEL BALANCE - STANDARD
PROCEDURE, TIRE
....................22-4
WHEEL COVER - REMOVAL
............22-14WHEEL INSPECTION, DIAGNOSIS AND
TESTING...........................22-11
WHEEL INSTALLATION - STANDARD
PROCEDURE, DUAL REAR.............22-12
WHEEL REPLACEMENT - STANDARD
PROCEDURE........................22-12
WHEEL RUNOUT - DIAGNOSIS AND
TESTING, TIRE.......................22-1
WHEEL SPEED SENSOR - DESCRIPTION,
FRONT..............................5-47
WHEEL SPEED SENSOR - DIAGNOSIS
AND TESTING, REAR...................5-49
WHEEL SPEED SENSOR -
INSTALLATION, FRONT.................5-48
WHEEL SPEED SENSOR -
INSTALLATION, REAR..................5-48
WHEEL SPEED SENSOR - OPERATION,
FRONT..............................5-47
WHEEL SPEED SENSOR - REMOVAL,
FRONT..............................5-48
WHEEL SPEED SENSOR - REMOVAL,
REAR...............................5-48
WHEEL WITH MATCHING TIRE -
DESCRIPTION, FULL SIZE, SPARE.......22-15
WHEELHOUSE SPLASH SHIELD -
INSTALLATION, FRONT................23-41
WHEELHOUSE SPLASH SHIELD -
INSTALLATION, REAR.................23-41
WHEELHOUSE SPLASH SHIELD -
REMOVAL, FRONT....................23-41
WHEELHOUSE SPLASH SHIELD -
REMOVAL, REAR.....................23-41
WHEELS - DESCRIPTION..............22-11
WHEELS - INSTALLATION, REAR DUAL....5-35
WHEELS - OPERATION................22-11
WHEELS - REMOVAL, REAR DUAL........5-34
WIND NOISE - DIAGNOSIS AND TESTING . . 23-2
WINDOW DEFOGGER RELAY -
DESCRIPTION, REAR..................8G-2
WINDOW DEFOGGER RELAY -
INSTALLATION, REAR..................8G-4
WINDOW DEFOGGER RELAY -
OPERATION, REAR....................8G-3
WINDOW DEFOGGER RELAY -
REMOVAL, REAR.....................8G-3
WINDOW DEFOGGER SWITCH -
DESCRIPTION, REAR..................8G-4
WINDOW DEFOGGER SWITCH -
OPERATION, REAR....................8G-4
WINDOW DEFOGGER SYSTEM -
DIAGNOSIS AND TESTING, REAR.........8G-2
WINDOW MOTOR - REMOVAL..........8N-20
WINDOW REGULATOR - MANUAL -
INSTALLATION..................23-27,23-35
WINDOW REGULATOR - MANUAL -
REMOVAL.....................23-26,23-35
WINDOW REGULATOR - POWER -
INSTALLATION..................23-26,23-34WINDOW REGULATOR - POWER -
REMOVAL.....................23-25,23-34
WINDOW SWITCH - DIAGNOSIS AND
TESTING...........................8N-20
WINDOW SWITCH - INSTALLATION......8N-21
WINDOW SWITCH - REMOVAL..........8N-20
WINDOWS - DESCRIPTION, POWER.....8N-19
WINDOWS - DIAGNOSIS AND TESTING,
POWER............................8N-19
WINDOWS - OPERATION, POWER.......8N-19
WINDSHIELD SAFETY PRECAUTIONS,
WARNING..........................23-88
WIPER & WASHER SYSTEM - CLEANING . . 8R-6
WIPER & WASHER SYSTEM -
DIAGNOSIS AND TESTING..............8R-6
WIPER & WASHER SYSTEM -
INSPECTION.........................8R-7
WIPER ARM - DESCRIPTION...........8R-17
WIPER ARM - INSTALLATION...........8R-18
WIPER ARM - OPERATION.............8R-18
WIPER ARM - REMOVAL..............8R-18
WIPER BLADE - DESCRIPTION..........8R-18
WIPER BLADE - INSTALLATION.........8R-20
WIPER BLADE - OPERATION...........8R-19
WIPER BLADE - REMOVAL.............8R-19
WIPER HIGH/LOW RELAY -
DESCRIPTION.......................8R-20
WIPER HIGH/LOW RELAY - DIAGNOSIS
AND TESTING.......................8R-21
WIPER HIGH/LOW RELAY -
INSTALLATION......................8R-22
WIPER HIGH/LOW RELAY - OPERATION . . 8R-20
WIPER HIGH/LOW RELAY - REMOVAL....8R-21
WIPER MODULE - DESCRIPTION........8R-22
WIPER MODULE - INSTALLATION.......8R-23
WIPER MODULE - OPERATION..........8R-23
WIPER MODULE - REMOVAL...........8R-23
WIPER ON/OFF RELAY - DESCRIPTION . . . 8R-24
WIPER ON/OFF RELAY - DIAGNOSIS AND
TESTING...........................8R-25
WIPER ON/OFF RELAY - INSTALLATION . . . 8R-26
WIPER ON/OFF RELAY - OPERATION.....8R-25
WIPER ON/OFF RELAY - REMOVAL......8R-26
WIPERS/WASHERS - DESCRIPTION
.......8R-1
WIPERS/WASHERS - OPERATION
........8R-4
WIRE SPLICING - STANDARD
PROCEDURE
.....................8W-01-15
WIRING - DESCRIPTION, TRAILER TOW
. . 8L-24
WIRING DIAGRAMS - DESCRIPTION,
HOW TO USE
.....................8W-01-1
WIRING HARNESS - DIAGNOSIS AND
TESTING
.........................8W-01-7
WIRING/TERMINAL, SPECIAL TOOLS
. . 8W-01-10
WORN THREADS - STANDARD
PROCEDURE, REPAIR
DAMAGED OR
...........9-190,9-240,9-9,9-94
DRINDEX 37
Description Group-Page Description Group-Page Description Group-Page