2003 DODGE RAM connector diagram

blower. The blower motor switch directs the ground
path through the correct resistor circuit to obtain the
selected speed.
The blower motor resistor cannot be repaired and,
if faulty or damaged, it must be replaced.
DIAGNOSIS AND TESTING - BLOWER MOTOR
RESISTOR
For circuit descriptions and diagrams, (Refer to
Appropriate Wiring Information).
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.
(1) Disconnect and isolate the battery negative
cable.
(2) Reach under the passenger side bottom of the
HVAC unit and unplug the wire harness connector
from the blower motor resistor.
(3) Check for continuity between each of the
blower motor switch input terminals of the resistor
and the resistor output terminal. In each case there
should be continuity. If OK, repair the wire harness
circuits between the blower motor switch and the
blower motor resistor or blower motor relay as
required. If not OK, replace the faulty blower motor
resistor.
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.(1) Disconnect and isolate the battery negative
cable.
(2) The blower motor resistor is accessable from
the passenger side of the HVAC unit and is located
on the bottom of the HVAC unit.
(3) Pull out the lock on the blower motor resistor
wire harness connector to unlock the connector latch.
(4) Depress the latch on the blower motor resistor
wire harness connector and unplug the connector
from the resistor.
(5) Remove the two screws that secure the resistor
to the HVAC housing.
(6) Remove the resistor from the HVAC housing.
INSTALLATION
(1) Install the new resistor in the HVAC housing.
(2) Install the two screws that secure the resistor
to the HVAC housing and tighten to 2.2 N´m (20 in.
lbs.).
(3) Plug in the blower motor harness connector.
(4) Push in the lock on the blower motor resistor
harness connector.
(5) Close the glove box door.
(6) Connect the battery negative cable.
BLOWER MOTOR SWITCH
DESCRIPTION
The A/C Heater blower motor is controlled by a
four position rotary-type blower motor switch,
mounted in the A/C Heater control panel. The switch
allows the selection of one of four blower motor
speeds, but can only be turned off by selecting the
Off position on the blower motor switch.
OPERATION
The blower motor switch directs the blower motor
ground path through the mode control switch to the
blower motor resistor, or directly to ground, as
required to achieve the selected blower motor speed.
The blower motor switch cannot be repaired and, if
faulty or damaged, the entire A/C Heater control unit
must be replaced.
DIAGNOSIS AND TESTING - BLOWER MOTOR
SWITCH
For circuit descriptions and diagrams, (Refer to
Appropriate Wiring Information).
24 - 18 CONTROLSDR
BLOWER MOTOR RESISTOR BLOCK (Continued)

DIAGNOSIS AND TESTING - BLOWER MOTOR
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.
For circuit descriptions and diagrams, (Refer to
Appropriate Wiring Information). Possible causes of
an inoperative blower motor include:
²Faulty fuse
²Faulty blower motor circuit wiring or wire har-
ness connectors
²Faulty blower motor resistor
²Faulty blower motor relay
²Faulty blower motor switch
²Faulty A/C Heater mode control switch
²Faulty blower motor.
Possible causes of the blower motor not operating
in all speeds include:
²Faulty blower motor switch
²Faulty blower motor resistor
²Faulty blower motor circuit wiring or wire har-
ness connectors.
VIBRATION
Possible causes of blower motor vibration include:
²Improper blower motor mounting
²Improper blower wheel mounting
²Blower wheel out of balance or bent
²Blower motor faulty.
NOISE
To verify that the blower is the source of the noise,
unplug the blower motor wire harness connector and
operate the HVAC system. If the noise goes away,
possible causes include:
²Foreign material in the HVAC housing
²Improper blower motor mounting
²Improper blower wheel mounting
²Blower motor faulty.
REMOVAL
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, DISABLE THE AIRBAG SYSTEM BEFORE
ATTEMPTING ANY STEERING WHEEL, STEERINGCOLUMN, 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.
The blower motor is located on the passenger side
of the vehicle under the dash
(1) Disconnect and isolate the battery negative
cable.
(2) Unplug the blower motor wire harness connec-
tor (Fig. 3).
(3) Remove the three screws that secure the
blower motor and wheel assembly to the HVAC hous-
ing.
(4) Rotate and tilt the blower motor unit as needed
for clearance to remove the blower motor and wheel
from the HVAC housing.
INSTALLATION
(1) Align and install the blower motor and wheel
assembly into the HVAC housing.
(2) Install the three mounting screws and tighten
to 2.2 N´m (20 in. lbs.).
Fig. 3 Blower Motor Assembly- (Case Removed
from vehicle for graphic)
1 - Blower Motor Resistor Mounting Screws (2)
2 - Blower Motor Resistor
3 - Blower Motor Resistor Connector
4 - Blower Motor Mounting Screw
5 - Blower Motor Assmebly
6 - Blower Motor Wire
7 - Blower Motor Mounting Screw
8 - HVAC Housing
9 - Blower Motor Wire Hold Down
10 - Blower Motor Mounting Screw
24 - 26 DISTRIBUTIONDR
BLOWER MOTOR (Continued)

CUSHION / COVER - FRONT -
INSTALLATION, SEAT.................23-83
CUSHION / COVER - FRONT -
INSTALLATION, SEAT BACK............23-83
CUSHION / COVER - FRONT - REMOVAL,
SEAT ..............................23-83
CUSHION / COVER - FRONT - REMOVAL,
SEAT BACK.........................23-83
CUSHION / COVER - REAR -
INSTALLATION, SEAT.................23-85
CUSHION / COVER - REAR -
INSTALLATION, SEAT BACK............23-85
CUSHION / COVER - REAR - REMOVAL,
SEAT ..............................23-85
CUSHION / COVER - REAR - REMOVAL,
SEAT BACK.........................23-85
CUSHION - INSTALLATION, CENTER
SEAT ..............................23-80
CUSHION - REMOVAL, CENTER SEAT.....23-80
CUSHION COVER - INSTALLATION,
CENTER SEAT.......................23-81
CUSHION COVER - REMOVAL, CENTER
SEAT ..............................23-81
CUSHION FRAME - REAR -
INSTALLATION, SEAT.................23-85
CUSHION FRAME - REAR - REMOVAL,
SEAT ..............................23-85
CUSTOMER PREFERENCES - STANDARD
PROCEDURE, RKE TRANSMITTER........8N-9
CV JOINT-INNER - INSTALLATION........3-16
CV JOINT-INNER - REMOVAL............3-16
CV JOINT-OUTER - INSTALLATION........3-13
CV JOINT-OUTER - REMOVAL............3-13
CYLINDER - DESCRIPTION, MASTER......5-19
CYLINDER - DIAGNOSIS AND TESTING,
IGNITION SWITCH AND KEY LOCK.......19-11
CYLINDER - INSTALLATION, KEY........19-12
CYLINDER - INSTALLATION, LOAD
FLOOR SUPPORT....................23-73
CYLINDER - INSTALLATION, LOCK.......23-24
CYLINDER - INSTALLATION, SUPPORT....23-49
CYLINDER - OPERATION, MASTER........5-20
CYLINDER - REMOVAL, KEY............19-12
CYLINDER - REMOVAL, LOAD FLOOR
SUPPORT..........................23-73
CYLINDER - REMOVAL, LOCK...........23-24
CYLINDER - REMOVAL, SUPPORT.......23-48
CYLINDER BLEEDING - STANDARD
PROCEDURE, MASTER.................5-20
CYLINDER BLOCK REFACING -
STANDARD PROCEDURE...............9-312
CYLINDER BORE - DE-GLAZE -
STANDARD PROCEDURE...............9-313
CYLINDER BORE HONING - STANDARD
PROCEDURE..........9-126,9-233,9-360,9-37
CYLINDER BORE REPAIR - STANDARD
PROCEDURE........................9-313
CYLINDER COMBUSTION PRESSURE
LEAKAGE - DIAGNOSIS AND TESTING....9-182,
9-231,9-359,9-8,9-92
CYLINDER COMPRESSION PRESSURE -
DIAGNOSIS AND TESTING . . . 9-182,9-231,9-359,
9-8,9-92
CYLINDER COMPRESSION/LEAKAGE
TESTS - DIAGNOSIS AND TESTING......9-288
CYLINDER HEAD - CLEANING . 9-195,9-300,9-372
CYLINDER HEAD - DESCRIPTION . . 9-106,9-243,
9-298,9-370
CYLINDER HEAD - INSPECTION....9-195,9-301,
9-372
CYLINDER HEAD - INSTALLATION . . 9-195,9-372
CYLINDER HEAD - INSTALLATION, LEFT . . 9-110
CYLINDER HEAD - INSTALLATION,
RIGHT.............................9-111
CYLINDER HEAD - LEFT - INSTALLATION . . . 9-23
CYLINDER HEAD - LEFT - REMOVAL......9-21
CYLINDER HEAD - OPERATION.....9-194,9-243
CYLINDER HEAD - REMOVAL . 9-195,9-298,9-371
CYLINDER HEAD - REMOVAL, LEFT......9-106
CYLINDER HEAD - REMOVAL, RIGHT.....9-108
CYLINDER HEAD - RIGHT -
INSTALLATION
........................9-32
CYLINDER HEAD - RIGHT - REMOVAL
.....9-32
CYLINDER HEAD COVER -
INSTALLATION
.......................9-304
CYLINDER HEAD COVER - REMOVAL
.....9-304
CYLINDER HEAD COVER GASKET -
DESCRIPTION
.......................9-243CYLINDER HEAD COVER GASKET -
OPERATION.........................9-243
CYLINDER HEAD COVER(S) - CLEANING . . 9-245,
9-374
CYLINDER HEAD COVER(S) -
DESCRIPTION..............9-121,9-26,9-373
CYLINDER HEAD COVER(S) -
INSPECTION...................9-245,9-374
CYLINDER HEAD COVER(S) -
INSTALLATION....9-196,9-245,9-27,9-36,9-374
CYLINDER HEAD COVER(S) - REMOVAL . . 9-196,
9-245,9-26,9-35,9-373
CYLINDER HEAD GASKET - DIAGNOSIS
AND TESTING........................9-20
CYLINDER HEAD GASKET FAILURE -
DIAGNOSIS AND TESTING . . . 9-194,9-243,9-370
CYLINDER/POWER BOOSTER -
DIAGNOSIS AND TESTING, MASTER......5-20
DAM - INSTALLATION, FRONT AIR........13-2
DAM - REMOVAL, FRONT AIR...........13-2
DAMAGED OR WORN THREADS -
STANDARD PROCEDURE, REPAIR . . 9-186,9-232,
9-289,9-361,9-9,9-93
DAMPER - INSPECTION, VIBRATION.....9-335
DAMPER - INSTALLATION..............19-35
DAMPER - INSTALLATION, VIBRATION . . . 9-142,
9-209,9-263,9-335,9-392,9-55
DAMPER - REMOVAL.................19-35
DAMPER - REMOVAL, VIBRATION . . 9-141,9-209,
9-263,9-335,9-392,9-54
DATA LINK CONNECTOR - DESCRIPTION . . . 8E-3
DATA LINK CONNECTOR - OPERATION......8E-3
DATA PLATE - DESCRIPTION, ENGINE....9-297
DAY / NIGHT MIRROR - DESCRIPTION,
AUTOMATIC........................8N-12
DAY / NIGHT MIRROR - DIAGNOSIS AND
TESTING, AUTOMATIC................8N-12
DAY / NIGHT MIRROR - OPERATION,
AUTOMATIC........................8N-12
DAY / NIGHT MIRROR - REMOVAL,
AUTOMATIC........................8N-13
DEFINITION - DESCRIPTION, TRIP........25-4
DEFROST DOOR - INSTALLATION........24-27
DEFROST DOOR - INSTALLATION, FLOOR . 24-30
DEFROST DOOR - REMOVAL...........24-27
DEFROST DOOR - REMOVAL, FLOOR.....24-30
DEFROST DOOR ACTUATOR -
INSTALLATION, FLOOR................24-20
DEFROST DOOR ACTUATOR - REMOVAL,
FLOOR.............................24-19
DEGAS CONTAINER-3.7L/4.7L -
DESCRIPTION, COOLANT...............7-38
DEGAS CONTAINER-3.7L/4.7L -
INSTALLATION, COOLANT...............7-39
DEGAS CONTAINER-3.7L/4.7L -
OPERATION, COOLANT.................7-38
DEGAS CONTAINER-3.7L/4.7L -
REMOVAL, COOLANT..................7-39
DE-GLAZE - STANDARD PROCEDURE,
CYLINDER BORE.....................9-313
DEMAGNETIZING - STANDARD
PROCEDURE, COMPASS...............8M-4
DEPLOYMENT - STANDARD
PROCEDURE, SERVICE AFTER A
SUPPLEMENTAL RESTRAINT
............8O-7
DETECTION ASSY - DESCRIPTION,
NATURAL VAC LEAK
..................25-23
DETECTION ASSY - INSTALLATION,
NATURAL VAC LEAK
..................25-24
DETECTION ASSY - OPERATION,
NATURAL VAC LEAK
..................25-23
DETECTION ASSY - REMOVAL, NATURAL
VAC LEAK
..........................25-24
DETECTION PUMP - DESCRIPTION, LEAK
. 25-13
DETECTION PUMP - INSTALLATION,
LEAK
..............................25-16
DETECTION PUMP - OPERATION, LEAK
. . . 25-14
DETECTION PUMP - REMOVAL, LEAK
....25-16
DEVICES - STANDARD PROCEDURE,
ELECTROSTATIC DISCHARGE (ESD)
SENSITIVE
........................8W-01-8
DIAGNOSTIC TROUBLE CODES -
DESCRIPTION
........................25-1
DIAGNOSTICS (OBD) - DIAGNOSIS AND
TESTING, ON-BOARD
...................7-5
DIAGRAMS - DESCRIPTION, HOW TO
USE WIRING
......................8W-01-1DIAGRAMS - HYDRAULIC SCHEMATICS,
SCHEMATICS...........21-175,21-355,21-513
DIESEL - CLEANING, RADIATOR - 5.9L....7-60
DIESEL - CLEANING, RADIATOR FAN -
5.9L................................7-41
DIESEL - CLEANING, WATER PUMP -
5.9L................................7-67
DIESEL - DESCRIPTION...............14-73
DIESEL - DESCRIPTION, 5.9L............11-2
DIESEL - DESCRIPTION, BELT
TENSIONERS - 5.9L...................7-24
DIESEL - DESCRIPTION, COOLING
SYSTEM FLOW - 5.9L...................7-2
DIESEL - DESCRIPTION, ENGINE 5.9L....9-282
DIESEL - DESCRIPTION, ENGINE BLOCK
HEATER - 5.9L........................7-43
DIESEL - DESCRIPTION, ENGINE
COOLANT THERMOSTAT - 5.9L...........7-52
DIESEL - DESCRIPTION, FAN DRIVE
VISCOUS CLUTCH - 5.9L...............7-55
DIESEL - DESCRIPTION, RADIATOR -
5.9L................................7-59
DIESEL - DESCRIPTION, TRANS COOLER
- 5.9L..............................7-73
DIESEL - DESCRIPTION, WATER PUMP -
5.9L................................7-67
DIESEL - FUEL INJECTOR FIRING ORDER . 14-60
DIESEL - FUEL SYSTEM PRESSURE......14-60
DIESEL - INSPECTION, RADIATOR - 5.9L . . . 7-60
DIESEL - INSPECTION, RADIATOR FAN -
5.9L................................7-41
DIESEL - INSPECTION, TAILPIPE - 5.9L....11-9
DIESEL - INSPECTION, WATER PUMP -
5.9L................................7-68
DIESEL - INSTALLATION...............14-74
DIESEL - INSTALLATION.....19-25,19-30,19-41
DIESEL - INSTALLATION, BELT
TENSIONERS - 5.9L...................7-25
DIESEL - INSTALLATION, DRIVE BELTS -
5.9L................................7-34
DIESEL - INSTALLATION, ENGINE BLOCK
HEATER - 5.9L........................7-44
DIESEL - INSTALLATION, ENGINE
COOLANT THERMOSTAT - 5.9L...........7-53
DIESEL - INSTALLATION, EXCEPT........14-22
DIESEL - INSTALLATION, MUFFLER -
5.9L................................11-9
DIESEL - INSTALLATION, RADIATOR -
5.9L................................7-60
DIESEL - INSTALLATION, RADIATOR FAN
- 5.9L..............................7-41
DIESEL - INSTALLATION, TAILPIPE - 5.9L . . 11-9
DIESEL - INSTALLATION, WATER PUMP -
5.9L................................7-68
DIESEL - OPERATION, BELT
TENSIONERS - 5.9L...................7-24
DIESEL - OPERATION, ENGINE BLOCK
HEATER - 5.9L........................7-43
DIESEL - OPERATION, ENGINE COOLANT
THERMOSTAT - 5.9L...................7-52
DIESEL - OPERATION, FAN DRIVE
VISCOUS CLUTCH - 5.9L...............7-55
DIESEL - OPERATION, RADIATOR - 5.9L . . . 7-59
DIESEL - OPERATION, TRANS COOLER -
5.9L................................7-74
DIESEL - OPERATION, WATER PUMP -
5.9L................................7-67
DIESEL - REMOVAL...................14-73
DIESEL - REMOVAL.........19-24,19-30,19-40
DIESEL - REMOVAL, BELT TENSIONERS -
5.9L................................7-25
DIESEL - REMOVAL, DRIVE BELTS - 5.9L . . 7-34
DIESEL - REMOVAL, ENGINE BLOCK
HEATER - 5.9L........................7-43
DIESEL - REMOVAL, ENGINE COOLANT
THERMOSTAT - 5.9L...................7-53
DIESEL - REMOVAL, EXCEPT...........14-20
DIESEL - REMOVAL, MUFFLER - 5.9L.....11-9
DIESEL - REMOVAL, RADIATOR - 5.9L.....7-59
DIESEL - REMOVAL, RADIATOR FAN -
5.9L
................................7-41
DIESEL - REMOVAL, TAILPIPE - 5.9L
......11-9
DIESEL - REMOVAL, WATER PUMP -
5.9L
................................7-67
DIESEL ENGINE - DESCRIPTION, FUEL
REQUIREMENTS
.......................0-1
DIESEL ENGINE - DIAGNOSIS AND
TESTING
............................11-3
10 INDEXDR
Description Group-Page Description Group-Page Description Group-Page