1998 DODGE RAM 1500 Door

Fig. 5 DOOR OPENING - STANDARD CAB
Fig. 6 DOOR OPENINGS - QUAD CAB
23 - 100 BODY STRUCTUREDR
OPENING DIMENSIONS (Continued)

STRUCTURAL ADHESIVE
LOCATIONS
SPECIFICATIONS
INDEX
DESCRIPTION FIGURE
FLOOR PAN AND SEAT MOUNTING FRONT CROSSMEMBER 19
FRONT FENDER 20
FLOOR PAN 21
INNER WHEELHOUSE TO INNER BOX SIDE PANEL 22
INNER BOX SIDE PANEL TO OUTER BOX SIDE PANEL 23
INNER WHEELHOUSE, CROSSMEMBERS AND CROSSMEMBER END SUPPORT
BRACKET TO INNER BOX SIDE PANEL24
INNER BOX SIDE PANEL TO OUTER BOX SIDE PANEL 25
INNER DOOR PANEL TO OUTER DOOR PANEL - FRONT DOOR (QUAD CAB) 26
INNER DOOR PANEL TO OUTER DOOR PANEL - FRONT DOOR (STANDARD CAB) 27
INNER DOOR PANEL TO OUTER DOOR PANEL - REAR DOOR (QUAD CAB) 28
SILL RAIL - STD CAB 29
SILL RAIL - QUAD CAB 30
Fig. 19 FLOOR PAN
23 - 112 BODY STRUCTUREDR

Fig. 26 INNER DOOR PANEL
Fig. 27 INNER DOOR PANEL
23 - 116 BODY STRUCTUREDR
STRUCTURAL ADHESIVE LOCATIONS (Continued)

Fig. 28 REAR DOOR INNER PANEL
DRBODY STRUCTURE 23 - 117
STRUCTURAL ADHESIVE LOCATIONS (Continued)

DESCRIPTION FIGURE
INNER BOX SIDE PANEL AND INNER TAILGATE PILLAR TO OUTER BOX SIDE PANEL 108
OUTER WHEELHOUSE PANEL TO INNER WHEELHOUSE PANEL 109
FRONT CROSSMEMBER, LONG CROSSMEMBER, AND WHEELHOUSE
CROSSMEMBER TO FLOOR PAN11 0
WHEELHOUSE CROSSMEMBER, LONG CROSSMEMBER AND REAR CROSS BOX
SILL TO BOX FLOOR PAN111
FRONT AND CENTER STAKE POCKET REINFORCEMENTS AND TIE DOWN
MOUNTING REINFORCEMENT TO INNER BOX SIDE PANEL11 2
OUTER FRONT AND CENTER STAKE POCKET REINFORCEMENT AND OUTER TIE
DOWN MOUNTING REINFORCEMENT TO INNER BOX SIDE PANEL11 3
OUTER WHEELHOUSE AND OUTER BRACE MOUNTING REINFORCEMENT TO
OUTER BOX SIDE PANEL11 4
TAILGATE BOX SIDE PIVOT REINFORCEMENT TO OUTER BOX SIDE PANEL 115
FRONT BOX SIDE PANEL TO FRONT CROSSMEMBER TO INNER BOX SIDE PANEL 116
FRONT BOX SIDE PANEL TO BOX FRONT PANEL TO INNER BOX SIDE PANEL/
FRONT STAKE POCKET REINFORCEMENT TO FRONT BOX SIDE PANEL TO BOX
FRONT PANEL11 7
BOX FRONT PANEL TO BOX FLOOR PANEL 118
BOX FLOOR PANEL TO INNER BOX SIDE PANEL 119
LONG CROSSMEMBERS TO CROSSMEMBER END SUPPORT BRACKETS TO INNER
BOX SIDE PANEL120
INNER WHEELHOUSE PANEL TO INNER BOX SIDE PANEL 121
TAILGATE PILLAR OUTER PANEL TO TAILGATE PILLAR INNER PANEL TO INNER
BOX SIDE PANEL122
REAR SILL CROSS BOX TO TAILGATE PILLAR OUTER PANEL AND INNER BOX SIDE
PANEL123
OUTER BOX SIDE PANEL TO BOX FRONT PANEL AND BOX FRONT SIDE PANEL 124
STAKE POCKET REINFORCEMENTS TO INNER BOX SIDE PANEL TO OUTER BOX
SIDE PANEL125
TAILGATE PIVOT REINFORCEMENT AND INNER TAILGATE PILLAR TO INNER BOX
SIDE PANEL TO OUTER BOX SIDE PANEL126
INNER WHEELHOUSE TO OUTER WHEELHOUSE/TAILGATE PIVOT
REINFORCEMENT TO OUTER TAILGATE PILLAR TO INNER TAILGATE PILLAR127
OUTER TAILGATE PILLAR TO OUTER BOX SIDE PANEL 128
INNER DOOR PANEL TO OUTER DOOR PANEL - FRONT DOOR (QUAD CAB) 129
INNER DOOR PANEL TO OUTER DOOR PANEL - FRONT DOOR (STANDARD CAB) 130
INNER DOOR PANEL TO OUTER DOOR PANEL - REAR DOOR (QUAD CAB) 131
DRBODY STRUCTURE 23 - 123
WELD LOCATIONS (Continued)

Fig. 128 009 OUTER TAILGATE PILLAR - LONG CARGO BOX ONLY
Fig. 129 INNER DOOR PANEL - QUAD CAB
23 - 190 BODY STRUCTUREDR
WELD LOCATIONS (Continued)

Fig. 130 INNER DOOR PANEL - STANDARD CAB
Fig. 131 INNER DOOR PANEL - QUAD CAB
DRBODY STRUCTURE 23 - 191
WELD LOCATIONS (Continued)

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