1998 DODGE RAM 1500 Steering box

NOTE: The instrument panel air outlets are retained
into the outlet housings by a light snap fit.
(1) Using a trim stick or another suitable wide
flat-bladed tool, gently pry the panel air outlet(s) out
of the panel outlet housing(s) as required (Fig. 1).
INSTALLATION
(1) Position the air outlet(s) onto the outlet hous-
ing(s).
(2) Gently push the air outlet into the housing
until it snaps into position.
BLEND DOOR
REMOVAL
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 AN ACCIDENTAL
AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.NOTE: Vehicles equiped with single zone HVAC
systems have one blend door, dual zone systems
have two blend doors.
(1) Remove the HVAC housing from the vehicle
(Refer to 24 - HEATING & AIR CONDITIONING/
DISTRIBUTION/HVAC HOUSING - REMOVAL).
(2) Disassemble the HVAC housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - DISASSEMBLY).
(3) Remove the levers from the driver and/or pas-
senger side blend door (if equipped) (Fig. 2).
(4) Gently slide the drivers and/or passenger side
blend door toward the out side of the housing. Tilt
and lift the door(s) out of the housing.
(5) Inspect the blend door(s), seals and the HVAC
housing for damage or binding and repair or replace
components as required.
INSTALLATION
(1) Position the blend door pivot shafts into the
pivot hole and actuator in the bottom of the lower
half of the HVAC housing.
(2) Install the blend door(s) by carefully tipping
the doors into the HVAC housing, then sliding each
door into it's operating position.
(3) Install the levers to the driver and/or passen-
ger side blend door (if equipped).
(4) Assemble the HVAC housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - ASSEMBLY)
Fig. 1 Instrument Panel Air Outlets
1 - HEADLIGHT SWITCH
2 - AIR OUTLETS
3 - INSTRUMENT CLUSTER
4 - CLIMATE CONTROL
5 - RADIO
6 - AIRBAG
7 - GLOVE BOX
8 - HEATED SEAT SWITCH (IF EQUIPPED)
9 - TRANSFER CASE SWITCH (IF EQUIPPED)
10 - CIGAR LIGHTER
11 - CUP HOLDERS
12 - ASH TRAY (IF EQUIPPED)
13 - POWER OUTLET
Fig. 2 Blend Door - Dual Zone Shown, Single Zone
Typical
1 - PASSENGER SIDE BLEND DOOR LEVER
2 - PASSENGER SIDE BLEND DOOR
3 - EVAPORATOR TEMPERATURE SENSOR WIRE
4 - HVAC HOUSING
5 - A/C EVAPORATOR
6 - EVAPORATOR TEMPERATURE SENSOR PROBE
7 - DRIVER SIDE BLEND DOOR
8 - DRIVER SIDE BLEND DOOR LEVER
DRDISTRIBUTION 24 - 27
AIR OUTLETS (Continued)

(5) Install the HVAC housing (Refer to 24 - HEAT-
ING & AIR CONDITIONING/DISTRIBUTION/HVAC
HOUSING - INSTALLATION)
BLOWER MOTOR
DESCRIPTION
The blower motor and blower wheel are located in
the passenger side end of the HVAC housing, below
the glove box. The blower motor controls the velocity
of air flowing through the HVAC housing by spinning
a squirrel cage-type blower wheel within the housing
at the selected speed. The blower motor and wheel
can be removed from the housing inside the vehicle
without removing the instrument panel or HVAC
housing.
OPERATION
The blower motor will only operate with the igni-
tion switch in the On position and the A/C-heater
mode control switch in any position, except Off. The
blower motor receives a fused battery feed circuit
through a fuse in the Power Distribution Center
(PDC) whenever the ignition switch is in the On posi-
tion. Blower motor speed is controlled by regulating
the ground path through or around the blower motor
resistor block and through the A/C-heater blower
motor switch.
The blower motor and blower motor wheel are ser-
viced only as a unit and cannot be repaired and, if
faulty or damaged, must be replaced.
DIAGNOSIS AND TESTING - BLOWER MOTOR
BLOWER MOTOR INOPERATIVE
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.
For circuit descriptions and diagrams, refer to the
appropriate wiring information. The wiring informa-
tion includes wiring, diagrams, proper wire and con-
nector repair procedures, further details on wire
harness routing and retention, as well as pin-out and
location views for the various wire harness connec-
tors, splices and grounds.
BLOWER MOTOR ELECTRICAL DIAGNOSIS
Refer to the Blower Motor Electrical Diagnosis
chart for basic checks of the blower motor circuit
(Fig. 3).
BLOWER MOTOR NOISE OR VIBRATION
Refer to the Blower Motor Noise/Vibration Diagno-
sis chart for basic checks of the blower motor when a
vibration or noise is present (Fig. 4).
24 - 28 DISTRIBUTIONDR
BLEND DOOR (Continued)

BLOCK - DIAGNOSIS AND TESTING,
BLOWER MOTOR RESISTOR............24-19
BLOCK - INSPECTION, ENGINE . 9-128,9-205,9-39
BLOCK - INSTALLATION, BLOWER
MOTOR RESISTOR...................24-19
BLOCK - INSTALLATION, BRAKE
JUNCTION...........................5-24
BLOCK - OPERATION, BLOWER MOTOR
RESISTOR..........................24-18
BLOCK - REMOVAL, BLOWER MOTOR
RESISTOR..........................24-19
BLOCK - REMOVAL, BRAKE JUNCTION....5-24
BLOCK HEATER - 5.9L DIESEL -
DESCRIPTION, ENGINE.................7-37
BLOCK HEATER - 5.9L DIESEL -
INSTALLATION, ENGINE................7-38
BLOCK HEATER - 5.9L DIESEL -
OPERATION, ENGINE...................7-38
BLOCK HEATER - 5.9L DIESEL -
REMOVAL, ENGINE....................7-38
BLOCK HEATER - DESCRIPTION, ENGINE . . . 7-36
BLOCK HEATER - DIAGNOSIS AND
TESTING, ENGINE.....................7-36
BLOCK HEATER - INSTALLATION,
ENGINE.............................7-37
BLOCK HEATER - OPERATION, ENGINE....7-36
BLOCK HEATER - REMOVAL, ENGINE......7-37
BLOCK REFACING - STANDARD
PROCEDURE, CYLINDER...............9-264
BLOWER MOTOR - DESCRIPTION.......24-28
BLOWER MOTOR - DIAGNOSIS AND
TESTING.............................24-28
BLOWER MOTOR - INSTALLATION.......24-31
BLOWER MOTOR - OPERATION.........24-28
BLOWER MOTOR - REMOVAL...........24-31
BLOWER MOTOR RESISTOR BLOCK -
DESCRIPTION.......................24-18
BLOWER MOTOR RESISTOR BLOCK -
DIAGNOSIS AND TESTING.............24-19
BLOWER MOTOR RESISTOR BLOCK -
INSTALLATION.......................24-19
BLOWER MOTOR RESISTOR BLOCK -
OPERATION.........................24-18
BLOWER MOTOR RESISTOR BLOCK -
REMOVAL..........................24-19
BLOWER MOTOR SWITCH -
DESCRIPTION.......................24-20
BLOWER MOTOR SWITCH - DIAGNOSIS
AND TESTING.......................24-20
BLOWER MOTOR SWITCH - OPERATION . . 24-20
BODY - ADJUSTMENTS, VALVE........21-310
BODY - ASSEMBLY, VALVE......21-299,21-414
BODY & CABLE - DESCRIPTION,
ANTENNA...........................8A-4
BODY & CABLE - INSTALLATION,
ANTENNA...........................8A-6
BODY & CABLE - OPERATION, ANTENNA . . . 8A-4
BODY & CABLE - REMOVAL, ANTENNA....8A-6
BODY - CLEANING, VALVE......21-298,21-412
BODY - DESCRIPTION, THROTTLE.......14-36
BODY - DESCRIPTION, VALVE....21-267,21-408
BODY - DISASSEMBLY, VALVE . . . 21-287,21-410
BODY - INSPECTION, VALVE.....21-298,21-413
BODY - INSTALLATION, THROTTLE.......14-37
BODY - INSTALLATION, VALVE . . . 21-309,21-414
BODY - OPERATION, THROTTLE.........14-36
BODY - OPERATION, VALVE.....21-272,21-408
BODY - REMOVAL, THROTTLE..........14-36
BODY - REMOVAL, VALVE.......21-286,21-410
BODY AND CABLE - DIAGNOSIS AND
TESTING, ANTENNA
...................8A-4
BODY CODE PLATE - DESCRIPTION
.....Intro.-3
BODY ISOLATORS - INSTALLATION
......23-37
BODY ISOLATORS - REMOVAL
..........23-36
BODY LUBRICATION - STANDARD
PROCEDURE
.........................23-3
BODY OPENING DIMENSIONS -
SPECIFICATIONS
.....................23-99
BODY PANEL REPAIR - STANDARD
PROCEDURE, PLASTIC
.................23-3
BODY SIDE MOLDINGS - INSTALLATION
. . 23-36
BODY SIDE MOLDINGS - REMOVAL
......23-36
BODY, SPECIAL TOOLS
................23-14
BODY VENT - INSTALLATION
...........23-71
BODY VENT - REMOVAL
...............23-71
BOOST PRESSURE - DIAGNOSIS AND
TESTING, TURBOCHARGER
.............11-11BOOSTER - DESCRIPTION, POWER
BRAKE..............................5-29
BOOSTER - DIAGNOSIS AND TESTING,
HYDRAULIC..........................5-30
BOOSTER - DIAGNOSIS AND TESTING,
MASTER CYLINDER/POWER.............5-25
BOOSTER - INSTALLATION, HYDRO-
BOOST BRAKE........................5-32
BOOSTER - INSTALLATION, POWER
BRAKE..............................5-29
BOOSTER - OPERATION, POWER BRAKE . . . 5-29
BOOSTER - REMOVAL, HYDRO-BOOST
BRAKE..............................5-31
BOOSTER - REMOVAL, POWER BRAKE....5-29
BOOT - INSTALLATION, 4WD FLOOR
SHIFT..............................23-62
BOOT - INSTALLATION, EXTENSION
HOUSING SEAL AND DUST......21-476,21-571
BOOT - REMOVAL, 4WD FLOOR SHIFT....23-62
BOOT - REMOVAL, EXTENSION HOUSING
SEAL AND DUST..............21-476,21-571
BORE - DE-GLAZE - STANDARD
PROCEDURE, CYLINDER...............9-264
BORE HONING - STANDARD
PROCEDURE, CYLINDER...........9-128,9-38
BORE REPAIR - STANDARD
PROCEDURE, CAM...................9-267
BORE REPAIR - STANDARD
PROCEDURE, CYLINDER...............9-265
BOX - INSTALLATION, CARGO..........23-37
BOX - INSTALLATION, GLOVE...........23-52
BOX - INSTALLATION, WITH CARGO . 8L-22,8L-23,
8L-24,8L-7,8L-9
BOX - INSTALLATION, WITHOUT CARGO . . 8L-22,
8L-23,8L-24,8L-8,8L-9
BOX - REMOVAL, CARGO..............23-37
BOX - REMOVAL, GLOVE..............23-52
BOX - REMOVAL, WITH CARGO....8L-22,8L-24,
8L-7,8L-9
BOX - REMOVAL, WITHOUT CARGO.....8L-22,
8L-23,8L-24,8L-7,8L-9
BOX - TIE DOWN - INSTALLATION,
CARGO............................23-38
BOX - TIE DOWN - REMOVAL, CARGO....23-38
BOX LAMP/SWITCH - INSTALLATION,
GLOVE.............................8L-28
BOX LAMP/SWITCH - REMOVAL, GLOVE . . 8L-27
BOX LATCH - INSTALLATION, GLOVE.....23-52
BOX LATCH - REMOVAL, GLOVE.........23-52
B-PILLAR GRAB HANDLE -
INSTALLATION.......................23-68
B-PILLAR GRAB HANDLE - REMOVAL....23-68
B-PILLAR LOWER TRIM - INSTALLATION . . 23-64
B-PILLAR LOWER TRIM - REMOVAL.....23-63
B-PILLAR UPPER TRIM - INSTALLATION . . 23-64
B-PILLAR UPPER TRIM - REMOVAL......23-64
BRACKET - INSTALLATION, REAR VIEW
MIRROR SUPPORT...................23-70
BRACKET - INSTALLATION, STEERING
COLUMN OPENING SUPPORT...........23-60
BRACKET - REMOVAL, STEERING
COLUMN OPENING SUPPORT...........23-60
BRACKETS - INSTALLATION, SEAT BACK
REAR - FOOTMANS LOOP..............23-85
BRACKETS - REMOVAL, SEAT BACK
REAR - FOOTMANS LOOP..............23-85
BRAKE - CLEANING, REAR DRUM IN
HAT ................................5-39
BRAKE - DESCRIPTION, CONTROLLER
ANTILOCK...........................8E-3
BRAKE - DESCRIPTION, PARKING........5-36
BRAKE - INSPECTION, REAR DRUM IN
HAT ................................5-39
BRAKE - INSTALLATION, CONTROLLER
ANTILOCK...........................8E-3
BRAKE - OPERATION, CONTROLLER
ANTILOCK...........................8E-3
BRAKE - OPERATION, PARKING..........5-36
BRAKE - REMOVAL, CONTROLLER
ANTILOCK
...........................8E-3
BRAKE BLEEDING - STANDARD
PROCEDURE, ABS
.....................5-46
BRAKE BOOSTER - DESCRIPTION,
POWER
.............................5-29
BRAKE BOOSTER - INSTALLATION,
HYDRO-BOOST
.......................5-32
BRAKE BOOSTER - INSTALLATION,
POWER
.............................5-29BRAKE BOOSTER - OPERATION, POWER . . . 5-29
BRAKE BOOSTER - REMOVAL,
HYDRO-BOOST.......................5-31
BRAKE BOOSTER - REMOVAL, POWER....5-29
BRAKE CABLE - INSTALLATION, FRONT
PARKING............................5-38
BRAKE CABLE - INSTALLATION, REAR
PARK...............................5-38
BRAKE CABLE - REMOVAL, FRONT
PARKING............................5-36
BRAKE CABLE - REMOVAL, REAR PARK . . . 5-37
BRAKE CALIPER ADAPTER MOUNT -
INSTALLATION, DISC...................5-22
BRAKE CALIPERS - DESCRIPTION, DISC . . . 5-16
BRAKE CALIPERS - OPERATION, DISC.....5-16
BRAKE FLUID CONTAMINATION -
DIAGNOSIS AND TESTING..............5-23
BRAKE FLUID LEVEL - STANDARD
PROCEDURE.........................5-23
BRAKE FLUID, SPECIFICATIONS..........5-23
BRAKE HOSE - INSTALLATION, FRONT.....5-13
BRAKE HOSE - INSTALLATION, REAR......5-12
BRAKE HOSE - REMOVAL, REAR.........5-11
BRAKE INDICATOR - DESCRIPTION,
BRAKE/PARK........................8J-19
BRAKE INDICATOR - DIAGNOSIS AND
TESTING...........................8J-20
BRAKE INDICATOR - OPERATION,
BRAKE/PARK........................8J-19
BRAKE JUNCTION BLOCK -
INSTALLATION.........................5-24
BRAKE JUNCTION BLOCK - REMOVAL.....5-24
BRAKE LAMP SWITCH - DESCRIPTION....8L-9
BRAKE LAMP SWITCH - DIAGNOSIS
AND TESTING.......................8L-10
BRAKE LAMP SWITCH - INSTALLATION . . . 8L-11
BRAKE LAMP SWITCH - OPERATION......8L-9
BRAKE LAMP SWITCH - REMOVAL......8L-10
BRAKE PROPORTIONING -
DESCRIPTION, ELECTRONIC VARIABLE....5-49
BRAKE PROPORTIONING - OPERATION,
ELECTRONIC VARIABLE................5-49
BRAKE ROTOR, DIAGNOSIS AND
TESTING - DISC......................5-32
BRAKE SHOES - ADJUSTMENT, PARKING . . 5-41
BRAKE, SPECIFICATIONS - BASE.........5-10
BRAKE SYSTEM - DIAGNOSIS AND
TESTING, BASE........................5-2
BRAKE TRANSMISSION SHIFT
INTERLOCK - ADJUSTMENTS....21-196,21-365
BRAKE TRANSMISSION SHIFT
INTERLOCK - DIAGNOSIS AND
TESTING....................21-196,21-364
BRAKE TRANSMISSION SHIFT
INTERLOCK SYSTEM - DESCRIPTION . . . 21-196,
21-364
BRAKE TRANSMISSION SHIFT
INTERLOCK SYSTEM - OPERATION.....21-196,
21-364
BRAKE/PARK BRAKE INDICATOR -
DESCRIPTION.......................8J-19
BRAKE/PARK BRAKE INDICATOR -
OPERATION.........................8J-19
BRAKES - ABS - DESCRIPTION...........5-45
BRAKES - ABS - OPERATION............5-45
BRAKES, SPECIAL TOOLS - BASE.........5-5
BREAK-IN - STANDARD PROCEDURE,
A/C COMPRESSOR CLUTCH............24-10
BREATHER - INSTALLATION,
CRANKCASE
........................9-243
BREATHER - REMOVAL, CRANKCASE
.....9-242
BUCKLE - INSTALLATION, FRONT
OUTBOARD SEAT BELT
................8O-38
BUCKLE - REMOVAL, FRONT OUTBOARD
SEAT BELT
.........................8O-37
BUILT-IN INDICATOR TEST - STANDARD
PROCEDURE
........................8F-10
BUMPER - INSTALLATION, FRONT
........13-2
BUMPER - INSTALLATION, JOUNCE
.......2-43
BUMPER - INSTALLATION, REAR
.........13-4
BUMPER - REMOVAL, FRONT
............13-2
BUMPER - REMOVAL, JOUNCE
...........2-43
BUMPER - REMOVAL, REAR
.............13-3
BUMPERS (3500) - INSTALLATION,
AUXILIARY SPRING
....................2-43
BUMPERS (3500) - REMOVAL,
AUXILIARY SPRING
....................2-43
4 INDEXDR
Description Group-Page Description Group-Page Description Group-Page