1998 DODGE RAM 1500 door lock

(4) Adjust the door to the correct position. (Refer
to 23 - BODY/BODY STRUCTURE/GAP AND
FLUSH - SPECIFICATIONS)
(5) Tighten the door to hinges fasteners to 28 N´m
(21 ft. lbs.).
(6) Tighten the latch striker bolts. (Refer to 23 -
BODY/DOOR - FRONT/LATCH STRIKER - INSTAL-
LATION)
DOOR GLASS
REMOVAL
(1) Remove the waterdam. (Refer to 23 - BODY/
DOOR - FRONT/WATERDAM - REMOVAL)
(2) Reinstall the window handle, if equipped.
(3) Remove the window switch from the door trim
panel and reconnect it to the door wire harness, if
equipped.
(4) Raise the window to the position shown and
remove the two nuts attaching the glass to the win-
dow regulator. (Fig. 2)
(5) Remove the two front run channel screws.
(Refer to 23 - BODY/DOOR - FRONT/GLASS RUN
CHANNEL - REMOVAL)
(6) Remove the inner belt molding. (Refer to 23 -
BODY/WEATHERSTRIP/SEALS/FRONT DOOR
INNER BELT WEATHERSTRIP - REMOVAL)
(7) Disengage the glass from the regulator and
lower into the door.
(8) Twist the glass forward in the door window
opening and remove.
INSTALLATION
(1) Position the glass into the window opening.(2) Engage the glass into the glass run weather-
strip.
(3) Raise the glass within the door opening and
connect the window regulator to the lift plate.
(4) Install the nuts and tighten to 10 N´m (89 in.
lbs.).
(5) Install the inner belt molding. (Refer to 23 -
BODY/WEATHERSTRIP/SEALS/FRONT DOOR
INNER BELT WEATHERSTRIP - INSTALLATION)
(6) Position the front run channel and install the
screws. (Refer to 23 - BODY/DOOR - FRONT/GLASS
RUN CHANNEL - INSTALLATION)
(7) Remove the window switch from the wire har-
ness, if equipped.
(8) Remove the window handle, if equipped.
(9) Install the waterdam. (Refer to 23 - BODY/
DOOR - FRONT/WATERDAM - INSTALLATION)
EXTERIOR HANDLE
REMOVAL
(1) Remove the door glass. (Refer to 23 - BODY/
DOOR - FRONT/DOOR GLASS - REMOVAL)
(2) Disconnect the lock switch electrical connector,
if equipped. (Fig. 3)
(3) Disconnect the actuator rods at the handle.
(4) Remove the nuts and remove the handle.
Fig. 2 DOOR GLASS POSITIONING
1 - SIGHT WINDOW
2 - WIDOW REGULATOR
3 - SIGHT WINDOW
4 - REGULATOR STABILIZER
Fig. 3 EXTERIOR HANDLE
1 - EXTERIOR HANDLE
2 - NUTS (2)
3 - ELECTRICAL CONNECTOR
4 - FRONT DOOR
5 - DOOR LATCH ASSEMBLY
6 - LATCH ACTUATOR ROD
7 - LOCK SWITCH WIRE HARNESS
8 - KEY CYLINDER ACTUATOR ROD
23 - 20 DOOR - FRONTDR
DOOR (Continued)

INSTALLATION
(1) Install the exterior handle and install the nuts.
(2) Connect the actuator rods at the handle
(3) Connect the lock switch electrical connector, if
equipped.
(4) Install the door glass. (Refer to 23 - BODY/
DOOR - FRONT/DOOR GLASS - INSTALLATION)
GLASS RUN CHANNEL
REMOVAL
(1) Raise glass into the full up position.
(2) Remove the waterdam. (Refer to 23 - BODY/
DOOR - FRONT/WATERDAM - REMOVAL)
FRONT RUN CHANNEL
(1) Remove the window regulator. (Refer to 23 -
BODY/DOOR - FRONT/WINDOW REGULATOR -
REMOVAL)
(2) Loosen the front run channel screws, slide up
and disengage from the door. (Fig. 4)
(3) Separate the glass run weatherstrip from the
channel and remove the front channel.
REAR RUN CHANNEL
(1) On standard cab models, remove the screws
from the side of the door. (Fig. 5)
(2) On quad cab models, remove the lower screw
from the side of the door, loosen the upper screw and
disengage from the door. (Fig. 6)(3) Separate the glass run weatherstrip from the
rear channel and remove the channel.
Fig. 4 FRONT RUN CHANNEL
1 - FRONT GLASS RUN CHANNEL
2 - UPPER SCREW
3 - LOWER SCREW
4 - DOOR PANEL OPENING
5 - RUN CHANNEL MOUNTING SLOTS (2)
Fig. 5 REAR RUN CHANNEL - QUAD CAB
1 - SCREWS
2 - REAR GLASS RUN CHANNEL
3 - DOOR PANEL OPENING
Fig. 6 REAR RUN CHANNEL - STANDARD CAB
1 - LOWER SCREW
2 - DOOR PANEL OPENING
3 - REAR GLASS RUN CHANNEL
4 - UPPER SCREW
DRDOOR - FRONT 23 - 21
EXTERIOR HANDLE (Continued)

ADJUSTMENTS
ADJUSTMENT
(1) Using a grease pencil or equivalent, mark the
position of the striker to aid in adjustment.
(2) Loosen the striker bolts.
(3) Change the striker position to adjust the rear
gap and flush measurement. (Refer to 23 - BODY/
BODY STRUCTURE/GAP AND FLUSH - SPECIFI-
CATIONS)
(4) Tighten the bolts to 28 N´m (21 ft. lbs.).
LOCK CYLINDER
REMOVAL
(1) Remove the exterior handle. (Refer to 23 -
BODY/DOOR - FRONT/EXTERIOR HANDLE -
REMOVAL)
(2) Remove the clip and remove the lock cylinder
lever and switch, if equipped.
(3) Remove the screw and remove the lock cylin-
der. (Fig. 11)
INSTALLATION
(1) Install the lock cylinder and install the screw.
(2) Install the lock cylinder switch, if equipped,
lever and retaining clip.
(3) Install the exterior handle. (Refer to 23 -
BODY/DOOR - FRONT/EXTERIOR HANDLE -
INSTALLATION)
TRIM PANEL
REMOVAL
(1) Remove the window crank, if equipped. (Fig.
13)
(2) Remove the interior handle. (Refer to 23 -
BODY/DOOR - FRONT/INSIDE HANDLE ACTUA-
TOR - REMOVAL)
(3) Remove the screws at the mirror flag and near
the inside handle. (Fig. 12)
CAUTION: Trim panel is attached to the door using
hooks molded into the panel. Do not pull the trim
panel straight off or damage to the panel and/or
power switch assembly may occur.
(4) Lift the trim panel up off the belt seal and
attachment hooks and separate the panel from the
door slightly.
(5) Disconnect the power window switch electrical
connector, if equipped, and remove the trim panel.
INSTALLATION
(1) Install the window switch into the trim panel,
if equipped.
(2) Position the trim panel onto the lower hooks
and connect the power window switch electrical con-
nector, if equipped.
(3) Position the remaining trim panel attachment
hooks into the door panel and seat the trim panel
into the belt seal fully.
(4) Install the screws near the inside handle and
at the mirror flag.
Fig. 11 LOCK CYLINDER
1 - LOCK CYLINDER
2 - EXTERIOR HANDLE
3 - SCREW
4 - LOCK SWITCH WIRE HARNESS
Fig. 12 TRIM PANEL ASSEMBLY
1 - SCREW INSERT (2)
2 - SCREWS (2)
3 - DOOR TRIM PANEL
4 - LOWER SCREWS (3)
5 - ATTACHMENT HOOKS
23 - 24 DOOR - FRONTDR
LATCH STRIKER (Continued)

EXTERIOR
TABLE OF CONTENTS
page page
BODY SIDE MOLDINGS
REMOVAL.............................36
INSTALLATION.........................36
BODY ISOLATORS
REMOVAL.............................36
INSTALLATION.........................37
CARGO BOX
REMOVAL.............................37
INSTALLATION.........................37
CARGO BOX - TIE DOWN
REMOVAL.............................38
INSTALLATION.........................38
COWL GRILLE
REMOVAL.............................38
INSTALLATION.........................38
EXTERIOR NAME PLATES
REMOVAL.............................38
INSTALLATION.........................38
FRONT FENDER
REMOVAL.............................39
INSTALLATION.........................39
FUEL FILL DOOR
REMOVAL.............................39
INSTALLATION.........................39GRILLE
REMOVAL.............................40
INSTALLATION.........................40
GRILLE FRAME
REMOVAL.............................40
INSTALLATION.........................40
FRONT WHEELHOUSE SPLASH SHIELD
REMOVAL.............................41
INSTALLATION.........................41
REAR WHEELHOUSE SPLASH SHIELD
REMOVAL.............................41
INSTALLATION.........................41
SIDE VIEW MIRROR
REMOVAL.............................41
INSTALLATION.........................42
UPPER RADIATOR CROSSMEMBER
REMOVAL.............................42
INSTALLATION.........................42
SIDE VIEW MIRROR GLASS
REMOVAL.............................42
INSTALLATION.........................43
REAR FENDER
REMOVAL.............................44
INSTALLATION.........................44
BODY SIDE MOLDINGS
REMOVAL
NOTE: Body side moldings are attached to the body
panels with adhesive tape.
(1) Apply a length of masking tape on the body
panel, parallel to the top edge of the molding and to
one end to use as a guide for installation, if neces-
sary.
(2) If temperature is below 21ÉC (70ÉF) warm
molding with a heat lamp or gun. Do not exceed 52ÉC
(120ÉF) when heating molding.
(3) Using a trim stick C-4755 or equivalent,
remove and discard the molding from the outside of
the body panel.
INSTALLATION
(1) Thoroughly clean all residue from the body side
molding attachment area of the body panel.(2) Wipe area with a clean lint free cloth moist-
ened with a 50% solution of water and alcohol and
wipe dry immediately with a dry lint free cloth.
(3) Apply new body side molding using the guide
tape on the body panel and apply consistent and uni-
form pressure of approximately 40 p.s.i. over the
entire surface of the molding.
BODY ISOLATORS
REMOVAL
(1) Loosen all cab to frame mounting bolts (six
standard cab, eight quad cab). (Fig. 1)
(2) Remove the mounting bolts and rebound cush-
ions
(3) Using a floor jack and block of wood under the
cab sill, lift the body to gain access to the isolators.
(4) Remove the isolators.
(5) Install new isolators and repeat steps one
through 4, for the opposite side.
23 - 36 EXTERIORDR

WINDSHIELD
WARNING
WINDSHIELD SAFETY PRECAUTIONS
WARNING: DO NOT OPERATE THE VEHICLE
WITHIN 24 HOURS OF WINDSHIELD INSTALLATION.
IT TAKES AT LEAST 24 HOURS FOR URETHANE
ADHESIVE TO CURE. IF IT IS NOT CURED, THE
WINDSHIELD MAY NOT PERFORM PROPERLY IN
AN ACCIDENT.
²URETHANE ADHESIVES ARE APPLIED AS A
SYSTEM. USE GLASS CLEANER, GLASS PREP
SOLVENT, GLASS PRIMER, PVC (VINYL) PRIMER
AND PINCH WELD (FENCE) PRIMER PROVIDED BY
THE ADHESIVE MANUFACTURER. IF NOT, STRUC-
TURAL INTEGRITY COULD BE COMPROMISED.
²DAIMLERCHRYSLER DOES NOT RECOMMEND
GLASS ADHESIVE BY BRAND. TECHNICIANS
SHOULD REVIEW PRODUCT LABELS AND TECHNI-
CAL DATA SHEETS, AND USE ONLY ADHESIVES
THAT THEIR MANUFACTURES WARRANT WILL
RESTORE A VEHICLE TO THE REQUIREMENTS OF
FMVSS 212. TECHNICIANS SHOULD ALSO INSURE
THAT PRIMERS AND CLEANERS ARE COMPATIBLE
WITH THE PARTICULAR ADHESIVE USED.
²BE SURE TO REFER TO THE URETHANE MAN-
UFACTURER'S DIRECTIONS FOR CURING TIME
SPECIFICATIONS, AND DO NOT USE ADHESIVE
AFTER ITS EXPIRATION DATE.
²VAPORS THAT ARE EMITTED FROM THE URE-
THANE ADHESIVE OR PRIMER COULD CAUSE
PERSONAL INJURY. USE THEM IN A WELL-VENTI-
LATED AREA.
²SKIN CONTACT WITH URETHANE ADHESIVE
SHOULD BE AVOIDED. PERSONAL INJURY MAY
RESULT.
²ALWAYS WEAR EYE AND HAND PROTECTION
WHEN WORKING WITH GLASS.
CAUTION: Protect all painted and trimmed surfaces
from coming in contact with urethane or primers.
Be careful not to damage painted surfaces when
removing moldings or cutting urethane around
windshield.
REMOVAL
(1) Remove inside rear view mirror. (Refer to 23 -
BODY/INTERIOR/REAR VIEW MIRROR -
REMOVAL).
(2) Remove cowl grill. (Refer to 23 - BODY/EXTE-
RIOR/COWL GRILLE - REMOVAL).(3) Remove the a-pillar weatherstrip retainer.
(Refer to 23 - BODY/WEATHERSTRIP/SEALS/A-
PILLAR WEATHERSTRIP RETAINER - REMOVAL)
(4) Remove the a-pillar trim panels. (Refer to 23 -
BODY/INTERIOR/A-PILLAR TRIM - REMOVAL)
(5) Remove the headliner and from the inside of
the vehicle, cut the upper urethane bonding from
around windshield upper edge using a suitable sharp
cold knife (C-4849). A pneumatic cutting device can
be used but is not recommended. (Refer to 23 -
BODY/INTERIOR/HEADLINER - REMOVAL)
(6) From the outside of the vehicle, cut urethane
bonding from the remaining sides of the windshield
using a suitable sharp cold knife (C-4849). A pneu-
matic cutting device can be used but is not recom-
mended.
(7) Separate windshield from vehicle.
INSTALLATION
WARNING: Allow the urethane at least 24 hours to
cure before returning the vehicle to use.
CAUTION: Roll down the left and right front door
glass and open the rear glass slider (if available)
before installing windshield to avoid pressurizing
the passenger compartment if a door is slammed
before urethane is cured. Water leaks can result.
The windshield fence should be cleaned of most of
its old urethane bonding material. A small amount of
old urethane, approximately 1-2 mm in height,
should remain on the fence. Do not grind off or com-
pletely remove all old urethane from the fence, the
paint finish and bonding strength will be adversely
affected.
(1) Place replacement windshield into windshield
opening and position glass in the center of the open-
ing against the support spacers. Mark the outside
surface of the glass at the support spacers with a
grease pencil or pieces of masking tape and ink pen
to use as a reference for installation. Remove replace-
ment windshield from windshield opening (Fig. 5).
(2) Position the windshield inside up on a suitable
work surface with two padded, wood 10 cm by 10 cm
by 50 cm (4 in. by 4 in. by 20 in.) blocks, placed par-
allel 75 cm (2.5 ft.) apart (Fig. 6).
(3) Clean inside of windshield with MOPAR Glass
Cleaner and lint-free cloth.
(4) Apply clear glass primer 25 mm (1 in.) wide
around perimeter of windshield and wipe with a new
clean and dry lint- free cloth.
(5) Apply black-out primer onto the glass using the
windshield molding as a guide. The primer should be
15 mm (5/8 in.) wide on the top and sides of the glass
23 - 88 STATIONARY GLASSDR

HEATING & AIR CONDITIONING
TABLE OF CONTENTS
page page
HEATING & AIR CONDITIONING
DESCRIPTION
DESCRIPTION - ENGINE COOLING
SYSTEM REQUIREMENTS...............1
DESCRIPTION - HEATER AND AIR
CONDITIONER........................1
OPERATION - HEATER AND AIR
CONDITIONER........................1
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - A/C
PERFORMANCE.......................3DIAGNOSIS AND TESTING - HEATER
PERFORMANCE TEST..................6
SPECIFICATIONS - A/C SYSTEM............7
CONTROLS.............................9
DISTRIBUTION..........................26
PLUMBING.............................41
HEATING & AIR
CONDITIONING
DESCRIPTION
DESCRIPTION - ENGINE COOLING SYSTEM
REQUIREMENTS
To maintain the performance level of the heating,
ventilation and air conditioning (HVAC) system, the
engine cooling system must be properly maintained.
The use of a bug screen is not recommended. Any
obstructions in front of the radiator or A/C condenser
will reduce the performance of the A/C and engine
cooling systems.
The engine cooling system includes the radiator,
thermostat, radiator hoses and the engine coolant
pump. Refer to Cooling for more information before
opening or attempting any service to the engine cool-
ing system.
DESCRIPTION - HEATER AND AIR
CONDITIONER
A manually controlled single zone type heating-air
conditioning system or a manually controlled dual
zone type heating-air conditioning system is available
on this model.
All vehicles are equipped with a common heater,
ventilation and air conditioning (HVAC) housing (Fig.
1). The system combines air conditioning, heating,
and ventilating capabilities in a single unit housing
mounted within the passenger compartment under
the instrument panel. The HVAC housing includes:
²Blower motor
²Blower motor resistor block²Heater core
²Evaporator coil
²Blend door and actuator
²Defrost door and actuator
²Mode door and actuator
²Recirculation door and actuator
Based upon the system and mode selected, condi-
tioned air can exit the HVAC housing through one or
a combination of the three main housing outlets:
defrost, panel or floor. The defrost outlet is located on
the top of the housing, the panel outlet is located on
the face of the housing and the floor outlet is located
on the bottom of the housing. Once the conditioned
air exits the unit housing, it is further directed
through molded plastic ducts to the various outlets in
the vehicle interior. These outlets and their locations
are as follows:
²Defroster Outlet- A single large defroster out-
let is located in the center of the instrument panel
top cover, near the base of the windshield.
²Side Window Demister Outlets- There are
two side window demister outlets, one is located at
each outboard end of the instrument panel top cover,
near the belt line at the A-pillars.
²Panel Outlets- There are four panel outlets in
the instrument panel, one located near each outboard
end of the instrument panel facing the rear of the
vehicle and two located near the top of the instru-
ment panel center bezel.
²Front Floor Outlets- There are two front floor
outlets, one located above each side of the floor panel
center tunnel near the dash panel.
OPERATION - HEATER AND AIR CONDITIONER
The heating and air conditioning systems pulls
outside (ambient) air through the cowl opening at the
base of the windshield, then into the plenum cham-
DRHEATING & AIR CONDITIONING 24 - 1

CONTROLS
TABLE OF CONTENTS
page page
A/C COMPRESSOR CLUTCH/COIL
DESCRIPTION..........................9
OPERATION............................9
DIAGNOSIS AND TESTING - A/C
COMPRESSOR CLUTCH COIL...........10
STANDARD PROCEDURE - A/C
COMPRESSOR CLUTCH BREAK-IN.......10
REMOVAL.............................10
INSPECTION..........................11
INSTALLATION.........................12
A/C COMPRESSOR CLUTCH RELAY
DESCRIPTION.........................13
OPERATION...........................13
REMOVAL.............................14
INSTALLATION.........................14
A/C HEATER CONTROL
DESCRIPTION.........................14
REMOVAL.............................15
INSTALLATION.........................15
A/C PRESSURE TRANSDUCER
DESCRIPTION.........................15
OPERATION...........................16
DIAGNOSIS AND TESTING - A/C PRESSURE
TRANSDUCER.......................16
REMOVAL.............................16
INSTALLATION.........................16
BLEND DOOR ACTUATOR
DESCRIPTION.........................17
OPERATION...........................17
REMOVAL.............................17
INSTALLATION.........................18
BLOWER MOTOR RESISTOR BLOCK
DESCRIPTION.........................18OPERATION...........................18
DIAGNOSIS AND TESTING - BLOWER
MOTOR RESISTOR BLOCK..............19
REMOVAL.............................19
INSTALLATION.........................19
BLOWER MOTOR SWITCH
DESCRIPTION.........................20
OPERATION...........................20
DIAGNOSIS AND TESTING - BLOWER
MOTOR SWITCH......................20
DEFROST DOOR ACTUATOR
DESCRIPTION.........................20
OPERATION...........................21
REMOVAL.............................21
INSTALLATION.........................21
EVAPORATOR TEMPERATURE SENSOR
DESCRIPTION.........................22
OPERATION...........................22
REMOVAL.............................22
INSTALLATION.........................22
MODE DOOR ACTUATOR
DESCRIPTION.........................23
OPERATION...........................23
REMOVAL.............................23
INSTALLATION.........................23
RECIRCULATION DOOR ACTUATOR
DESCRIPTION.........................24
OPERATION...........................24
REMOVAL.............................24
INSTALLATION.........................25
A/C COMPRESSOR CLUTCH/
COIL
DESCRIPTION
The compressor clutch assembly consists of a sta-
tionary electromagnetic coil, a pulley bearing and
pulley assembly, and a clutch plate (Fig. 1). The elec-
tromagnetic coil and the pulley bearing and pulley
assembly are each retained on the nose of the com-
pressor front housing with snap rings. The clutch
plate is keyed to the compressor shaft and secured
with a nut. These components provide the means toengage and disengage the compressor from the
engine serpentine accessory drive belt.
OPERATION
The A/C compressor clutch provides the means to
engage and disengage the A/C compressor from the
engine serpentine accessory drive belt. When the
clutch coil is energized, it magnetically draws the
clutch into contact with the pulley and drives the
compressor shaft. When the coil is not energized, the
pulley freewheels on the pulley bearing, which is
part of the pulley assembly. The compressor clutch
DRCONTROLS 24 - 9

NOTE: The single zone heating and air conditioning
system is equipped with a single blend door actua-
tor. The dual zone system has two blend door
actuators, one for the driver side blend air door and
one for the passenger side blend air door. The
same service procedures can be used for each of
these actuators.
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument panel from the vehicle
(Refer to 23 - BODY/INSTRUMENT PANEL/IN-
STRUMENT PANEL ASSEMBLY - REMOVAL).
(3) Disconnect the wire harness connector from the
blend door actuator(s) (Fig. 16).
(4) Remove the screws that secure the blend door
actuator(s) to the HVAC housing.
(5) Remove the blend door actuator(s) from the
HVAC housing.INSTALLATION
(1) Position the blend door actuator(s) into the
HVAC housing. If necessary, rotate the actuator(s)
slightly to align the splines on the actuator output
sleeve(s) with those on the blend door linkage.
(2) Install and tighten the screws that secure the
blend door actuator(s) to the HVAC housing. Tighten
the screws to 2 N´m (17 in. lbs.).
(3) Connect the HVAC wire harness connector to
the blend door actuator(s).
(4) Install the instrument panel (Refer to 23 -
BODY/INSTRUMENT PANEL/INSTRUMENT
PANEL ASSEMBLY - INSTALLATION).
(5) Reconnect the battery negative cable.
BLOWER MOTOR RESISTOR
BLOCK
DESCRIPTION
The blower motor resistor is mounted to the bot-
tom side of the HVAC housing near the blower motor.
It can be accessed for service from underneath the
instrument panel.
OPERATION
The resistor has multiple resistor wires, each of
which will reduce the current flow to the blower
motor to change the blower motor speed by changing
the resistance in the blower motor ground path. The
blower motor switch directs the ground path through
the correct resistor wire to obtain the selected speed.
With the blower motor switch in the lowest speed
position, the ground path for the motor is applied
through all of the resistor wires. Each higher speed
selected with the blower motor switch applies the
blower motor ground path through fewer of the resis-
tor wires, increasing the blower motor speed. When
the blower motor switch is in the highest speed posi-
tion, the blower motor resistor is bypassed and the
blower motor receives a direct path to ground.
The blower motor resistor cannot be repaired and,
if faulty or damaged, it must be replaced.
Fig. 16 HVAC Housing - Dual Zone Shown, Single
Zone Typical
1 - NUT
2 - PASSENGER BLEND DOOR ACTUATOR
3 - NUT
4 - INLET BAFFLE
5 - RECIRCULATION DOOR ACTUATOR
6 - RECIRCULATION DOOR
7 - DRIVER SIDE BLEND DOOR ACTUATOR
8 - HVAC HOUSING
9 - BOLT
10 - DEFROSTER DOOR ACTUATOR
11 - MODE DOOR ACTUATOR
24 - 18 CONTROLSDR
BLEND DOOR ACTUATOR (Continued)