2003 DODGE RAM ad blue

HEADLAMP-LEFT - BLUE 3 WAY
CAV CIRCUIT FUNCTION
1 Y171 18WT/DG LEFT LOW BEAM OUTPUT
2 Z141 18BK/LB GROUND
3 Y170 18WT/LG LEFT HIGH BEAM OUTPUT
HEADLAMP-RIGHT - BLUE 3 WAY
CAV CIRCUIT FUNCTION
1 Y169 18WT/TN RIGHT LOW BEAM OUTPUT
2 Z142 18BK/LG GROUND
3 Y168 18WT/LB RIGHT HIGH BEAM OUTPUT
HEATED SEAT CUSHION-PASSENGER - BLUE 4 WAY
CAV CIRCUIT FUNCTION
1 P142 20TN/DB PASSENGER SEAT TEMPERATURE SENSOR INPUT
2 Z121 20BK/WT GROUND
3 P144 20BK/LG PASSENGER SEAT TEMPERATURE 5 VOLT SUPPLY
4 P86 20PK/BK SEAT HEATER DRIVER
HEATED SEAT SWITCH-DRIVER - RED 6 WAY
CAV CIRCUIT FUNCTION
1 P137 20VT/DG DRIVER SEAT LOW HEAT LED DRIVER
2 Y161 20OR/RD PANEL LAMPS FEED
3 Z259 20BK/LG GROUND
4 P131 20RD/DG HEATED SEAT SWITCH SUPPLY
5 P139 20VT/WT DRIVER SEAT HIGH HEAT LED DRIVER
6 P133 20TN/DG DRIVER SEAT HEATER MUX SWITCH
8W - 80 - 64 8W-80 CONNECTOR PIN-OUTSDR

HEATED SEAT SWITCH-PASSENGER - BLUE 6 WAY
CAV CIRCUIT FUNCTION
1 P138 20VT/LG PASSENGER SEAT LOW HEAT LED DRIVER
2 Y161 20OR/RD PANEL LAMPS FEED
3 Z260 20DG/BK GROUND
4 P131 20RD/DG HEATED SEAT SWITCH SUPPLY
5 P140 20VT/BK PASSENGER SEAT HIGH HEAT LED DRIVER
6 P134 20TN/LG PASSENGER SEAT HEATER MUX SWITCH
HORN SWITCH - WHITE 2 WAY
CAV CIRCUIT FUNCTION
1 X3 20BK/RD HORN SWITCH SENSE
2- -
HORN-HIGH NOTE - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 X2 18DG/RD HORN RELAY OUTPUT
2 Z307 18BK/WT GROUND
HORN-LOW NOTE - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 X2 18DG/RD HORN RELAY OUTPUT
2 Z308 18BK/BR GROUND
IDLE AIR CONTROL MOTOR (3.7L/5.9L/8.0L) - BLACK 4 WAY
CAV CIRCUIT FUNCTION
C K39 18GY/RD IDLE AIR CONTROL MOTOR NO. 3 DRIVER
B K60 18YL/BK IDLE AIR CONTROL MOTOR NO. 2 DRIVER
A K40 18BR/WT IDLE AIR CONTROL MOTOR NO. 1 DRIVER
D K59 18VT/BK IDLE AIR CONTROL MOTOR NO. 4 DRIVER
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 65

MODE DOOR ACTUATOR 1 (PANEL TO FLOOR)-2WAY
CAV CIRCUIT FUNCTION
1 C34 20DB/WT COMMON DOOR DRIVER
2 C35 20DG/YL MODE DOOR 1 DRIVER
MODE DOOR ACTUATOR 2 (DEFROST TO FLOOR)-2WAY
CAV CIRCUIT FUNCTION
1 C34 20DB/WT COMMON DOOR DRIVER
2 C33 20DB/RD MODE DOOR 2 DRIVER
MULTI-FUNCTION SWITCH - BLACK 4 WAY
CAV CIRCUIT FUNCTION
1 Y109 20VT/OR WASH/BEAM SELECT SWITCH SIGNAL
2 Y108 20VT/BR WIPER/TURN/BEAM SELECT SWITCH RETURN
3 Y110 20WT/VT TURN LAMPS SWITCH SIGNAL
4 V8 20VT INTERMITTENT WIPER SWITCH SIGNAL
OUTPUT SPEED SENSOR (3.7L/4.7L/5.7L) - BLACK 2 WAY
CAV CIRCUIT FUNCTION
1 T14 18LG/WT OUTPUT SPEED SENSOR SIGNAL
2 T13 18DB/BK SPEED SENSOR GROUND
OUTPUT SPEED SENSOR (5.9L) - DK BLUE 2 WAY
CAV CIRCUIT FUNCTION
1 T14 18LG/WT OUTPUT SPEED SENSOR SIGNAL
2 T13 18DB/BK SPEED SENSOR GROUND
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 77

POWER WINDOW SWITCH-LEFT REAR - BLUE 6 WAY
CAV CIRCUIT FUNCTION
1 Q13 14DB DRIVER REAR WINDOW DRIVER (UP)
2 Q27 14RD/BK LEFT REAR WINDOW DRIVER (DOWN)
3- -
4 Q17 14DB/WT LEFT REAR WINDOW DRIVER (UP)
5 Q23 14RD/WT DRIVER REAR WINDOW DRIVER (DOWN)
6 Q1 14YL POWER WINDOW SWITCH FEED
POWER WINDOW SWITCH-RIGHT REAR - BLUE 6 WAY
CAV CIRCUIT FUNCTION
1 Q12 14DB PASSENGER REAR WINDOW DRIVER (UP)
2 Q28 14RD/BK RIGHT REAR WINDOW DRIVER (DOWN)
3- -
4 Q18 14DB/WT RIGHT REAR WINDOW DRIVER (UP)
5 Q24 14RD/WT PASSENGER REAR WINDOW DRIVER (DOWN)
6 Q1 14YL POWER WINDOW SWITCH FEED
POWER WINDOW-CIRCUIT BREAKER - GRAY 2 WAY
CAV CIRCUIT FUNCTION
1 F1 10DB IGNITION SWITCH OUTPUT (RUN-ACC)
2 F21 12TN FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
POWERTRAIN CONTROL MODULE - C1 (DIESEL) - 32 WAY
CAV CIRCUIT FUNCTION
1- -
2 Y135 18LG/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
3- -
4 K914 18VT/RD SENSOR GROUND
5- -
6 T24 18GY/BK PARK/NEUTRAL POSITION SWITCH SENSE (T41)
7- -
8 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
9- -
10 - -
11 - -
12 - -
13 - -
14 - -
15 - -
16 - -
17 - -
18 - -
19 - -
20 - -
21 - -
22 A14 18RD/WT FUSED B(+)
23 K22 18OR/DB ACCELERATOR PEDAL POSITION SENSOR SIGNAL
8W - 80 - 84 8W-80 CONNECTOR PIN-OUTSDR

SWITCH-PASSENGER AIRBAG ON-OFF - BLUE 6 WAY
CAV CIRCUIT FUNCTION
1 R5 18VT/YL PASSENGER AIRBAG MUX SWITCH SENSE
2 R4 18BR/YL PASSENGER AIRBAG MUX SWITCH RETURN
3 R166 18LG/TN PASSENGER AIRBAG INDICATOR DRIVER
4 F14 18LG/YL FUSED IGNITION SWITCH OUTPUT (RUN-START)
5- -
6- -
TAIL/STOP/TURN SIGNAL LAMP-LEFT - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 Y174 18PK/VT FUSED PARK LAMP RELAY OUTPUT
2- -
3 Z150 18BK GROUND
4 L24 18WT/LG LEFT STOP LAMP FEED
5 L63 18DG/RD LEFT REAR TURN LAMP DRIVER
6 L1 18VT/BK BACK-UP LAMP FEED
TAIL/STOP/TURN SIGNAL LAMP-RIGHT - BLACK 6 WAY
CAV CIRCUIT FUNCTION
1 L7 18PK/VT HEADLAMP SWITCH OUTPUT
2- -
3 Z151 18BK GROUND
4 L22 18WT/LG RIGHT STOP LAMP FEED
5 L62 18DG/RD RIGHT REAR TURN LAMP DRIVER
6 L1 18VT/BK BACK-UP LAMP FEED
TENSION REDUCER-SEAT BELT (STANDARD CAB)-2WAY
CAV CIRCUIT FUNCTION
1 Y105 20BR/RD FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
2 G10 20LG/RD SEAT BELT SWITCH SENSE
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 99

(4) Remove the integrated power module retaining
bolt and screw (Fig. 2).
(5) Grasp the integrated power module with two
hands and slide the assembly in the direction shown
(Fig. 3) to free the module from its mounting bracket.
Position the assembly upside down to access the elec-
trical connectors located on the bottom of the unit.
(6) Disconnect the electrical connectors by depress-
ing the locking tab and rotating the connector arm
outboard, until the connector is free from the module
assembly. Be certain to pull the connectors straight
off.
(7) Position the integrated power module on a
bench and remove the four front control module
retaining screws.
(8) Disconnect the front control module by pulling
it straight off the integrated power module.
INSTALLATION
(1) Connect the front control module by pushing it
straight on the integrated power module electrical
receptacle.
(2) Install the four front control module retaining
screws. Torque to 30 in. lbs. +/-5.
NOTE: Integrated power module electrical connec-
tors are color coded to ease location reference (Fig.
4).
(3) Connect the electrical connectors by pushing
straight on and rotating the connector arm inboard,
until the connector is firmly locked in place on the
module assembly.(4) Grasp the integrated power module with two
hands and install the assembly on the battery tray
(Fig. 5).
(5) Install the integrated power module retaining
bolt and screw.
(6) Connect the gray connector on the integrated
power module housing.
(7) Install the B+ terminal cable and nut on the
integrated power module B+ terminal. Snap the
cover in place.
(8) Connect the negative and positive battery
cables.
FRONT CONTROL MODULE
DESCRIPTION
The Front Control Module (FCM) is a micro con-
troller based module located in the left front corner
of the engine compartment. On this model the inte-
grated power module must be positioned aside in
order to access the front control module. The front
control module mates to the power distribution cen-
ter to form the Integrated Power Module (IPM). The
integrated power module connects directly to the bat-
Fig. 3 REMOVING INTEGRATED POWER MODULE
Fig. 4 INTEGRATED POWER MODULE ELECTRICAL
CONNECTIONS
1 - RETAINING LATCH
2 - GRAY CONNECTOR
3 - GREEN CONNECTOR
4 - GREEN CONNECTOR
5 - BLUE CONNECTOR
6 - WHITE CONNECTOR
7 - BLACK CONNECTOR
8 - BLACK CONNECTOR
8W - 97 - 4 8W-97 POWER DISTRIBUTIONDR
INTEGRATED POWER MODULE (Continued)

(6) Remove the cylinder head cover mounting bolts
(Fig. 16).
(7) Remove cylinder head cover and gasket.
NOTE: The gasket may be used again, providing no
cuts, tears, or deformation has occurred.
INSTALLATION
CAUTION: Do not use harsh cleaners to clean the
cylinder head covers. Severe damage to covers
may occur.
NOTE: The gasket may be used again, provided no
cuts, tears, or deformation has occurred.
(1) Clean cylinder head cover and both sealing sur-
faces. Inspect and replace gasket as necessary.
(2) Tighten cylinder head cover bolts and double
ended studs to 12 N´m (105 in. lbs.).
(3) Install left side breather and connect breather
tube.
(4) Connect injector electrical connectors and injec-
tor harness retaining clips.(5) Install the resonator and air inlet hose.
(6) Connect negative cable to battery.
INTAKE/EXHAUST VALVES &
SEATS
DESCRIPTION
The valves are made of heat resistant steel and
have chrome plated stems to prevent scuffing. Each
valve is actuated by a roller rocker arm which pivots
on a stationary lash adjuster. All valves use three
bead lock keepers to retain the springs and promote
valve rotation.
STANDARD PROCEDURE - REFACING
NOTE: Valve seats that are worn or burned can be
reworked, provided that correct angle and seat
width are maintained. Otherwise the cylinder head
must be replaced.
NOTE: When refacing valves and valve seats, it is
important that the correct size valve guide pilot be
used for reseating stones. A true and complete sur-
face must be obtained.
(1) Using a suitable dial indicator measure the
center of the valve seat Total run out must not
exceed 0.051 mm (0.002 in).
(2) Apply a small amount of Prussian blue to the
valve seat, insert the valve into the cylinder head,
while applying light pressure on the valve rotate the
valve. Remove the valve and examine the valve face.
If the blue is transferred below the top edge of the
valve face, lower the valve seat using a 15 degree
stone. If the blue is transferred to the bottom edge of
the valve face, raise the valve seat using a 65 degree
stone.
(3) When the seat is properly positioned the width
of the intake seat must be 1.75 ± 2.36 mm (0.0689 ±
0.0928 in.) and the exhaust seat must be 1.71 ± 2.32
mm (0.0673 ± 0.0911 in.).
(4) Check the valve spring installed height after
refacing the valve and seat. The installed height for
both intake and exhaust valve springs must not
exceed 40.74 mm (1.6039 in.).
Fig. 16 CYLINDER HEAD COVER -TYPICAL
1 - SCREWS
2 - CYLINDER HEAD COVER
DRENGINE - 3.7L 9 - 27
CYLINDER HEAD COVER(S) (Continued)

INSPECTION
NOTE: Thoroughly inspect the connecting rod bear-
ing bores and main bearing bores for scoring, blue-
ing or severe scratches. Further disassembly may
be required.
If connecting rod bearing bores show damage, the
cylinder heads must be removed to service the piston
and rod assemblies. If the bedplate or the cylinder
block main bearing bores show damage the engine
must be replaced.
(1) If required, remove the main bearing halves
from the cylinder block and bedplate.(2) Thoroughly clean the bedplate to cylinder block
sealing surfaces and main bearing bores. Remove all
oil and sealant residue.
(3) Inspect the bedplate main bearing bores for
cracks, scoring or severe blueing. If either condition
exists the engine must be replaced.
(4) Inspect the crankshaft thrust washers for scor-
ing, scratches, wear or blueing. If either condition
exist replace the thrust washers.
(5) Inspect the oil pan gasket/windage tray for
splits, tears or cracks in the gasket sealing surfaces.
Replace gasket as necessary.
Fig. 32 BEDPLATE PRY POINT LOCATION
9 - 40 ENGINE - 3.7LDR
CRANKSHAFT (Continued)