2002 DODGE RAM engine oil

POWERTRAIN CONTROL MODULE C1 (DIESEL) - BLACK 32 WAY
CAV CIRCUIT FUNCTION
29 - -
30 - -
31 Z12 14BK/TN GROUND
32 Z12 14BK/TN GROUND
POWERTRAIN CONTROL MODULE C1 (GAS)- BLACK 32 WAY
CAV CIRCUIT FUNCTION
1 K32 18YL/GY(8.0L) IGNITION COIL NO. 4 DRIVER
2 F18 18LG/BK FUSED IGNITION SWITCH OUTPUT (RUN-START)
3 K18 18RD/BK(8.0L) IGNITION COIL NO. 3 DRIVER
4 K4 18BK/LB SENSOR GROUND
5 K43 18DG/GY(8.0L) IGNITION COIL NO. 5 DRIVER
6 T41 18BK/WT (A/T) PARK/NEUTRAL POSITION SWITCH SENSE
7 K19 18BK/GY IGNITION COIL NO.1
7 K19 18BK/GY(5.9L) IGNITION COIL NO. 1 DRIVER
8 K24 18GY/BK CRANKSHAFT POSITION SENSOR SIGNAL
9 K17 18DB/WT(8.0L) IGNITION COIL NO. 2 DRIVER
10 K60 18YL/BK IDLE AIR CONTROL NO. 2 DRIVER
11 K40 18BR/WT IDLE AIR CONTROL NO. 3 DRIVER
12 - -
13 G113 18OR PTO SWITCH SENSE
14 - -
15 K21 18BK/RD INTAKE AIR TEMPERATURE SENSOR SIGNAL
16 K2 18TN/BK ENGINE COOLANT TEMPERATURE SENSOR SIGNAL
17 K6 18VT/WT 5V SUPPLY
18 K44 18TN/YL CAMSHAFT POSITION SENSOR SIGNAL
19 K39 18GY/RD IDLE AIR CONTROL NO. 1 DRIVER
20 K59 18VT/BK IDLE AIR CONTROL NO. 4 DRIVER
21 - -
22 A14 16RD/WT FUSED B(+)
23 K22 18OR/DB THROTTLE POSITION SENSOR SIGNAL
24 K41 18BK/DG(5.9L/8.0L) OXYGEN SENSOR 1/1 SIGNAL
24 K141 18TN/WT(CALIFORNIA) OXYGEN SENSOR 1/1 SIGNAL
25 K341 18OR/BK(5.9L)(CALIFORNIA) OXYGEN SENSOR 1/2 SIGNAL
25 K341 18OR/BK(A/T)(CALIFORNIA) OXYGEN SENSOR 1/3 SIGNAL
26 K241 18LG/RD(CALIFORNIA) OXYGEN SENSOR 2/1 SIGNAL
26 K241 18LG/RD(8.0L/5.9L) OXYGEN SENSOR 2/1 SIGNAL
27 K1 18DG/RD MAP SENSOR SIGNAL
28 - -
29 K141 18TN/WT(8.0L)(A/T)(CALIFORNIA) OXYGEN SENSOR 1/2 SIGNAL
29 K441 18OR/TN(5.9L)(CALIFORNIA) OXYGEN SENSOR 2/2 SIGNAL
30 - -
31 Z12 14BK/TN GROUND
32 Z12 14BK/TN GROUND
A24 K141 18TN/WT(5.9L) OXYGEN SENSOR 1/1 SIGNAL
B24 K141 18TN/WT(5.9L) OXYGEN SENSOR 1/1 SIGNAL
8W - 80 - 70 8W-80 CONNECTOR PIN-OUTSBR/BE

POWERTRAIN CONTROL MODULE C2 (GAS) - WHITE 32 WAY
CAV CIRCUIT FUNCTION
13 K28 18GY/LB (5.9L)(8.0L) FUEL INJECTOR NO. 8 DRIVER
14 K116 18WT (8.0L) FUEL INJECTOR NO. 10 DRIVER
15 K12 18TN FUEL INJECTOR NO. 2 DRIVER
16 K14 18LB/BR FUEL INJECTOR NO. 4 DRIVER
17 - -
18 - -
19 - -
20 - -
21 T60 18BR (A/T)(5.9L) 3-4 SHIFT SOLENOID CONTROL
22 - -
23 G60 18GY/OR ENGINE OIL PRESSURE SENSOR SIGNAL
23 G60 18GY/OR(5.9L) ENGINE OIL PRESURE SENSOR SIGNAL
24 - -
25 T13 18DB/BK (A/T)(5.9L) OUTPUT SPEED SENSOR GROUND
26 - -
27 G7 18WT/OR VEHICLE SPEED SENSOR SIGNAL
28 T14 18LG/BK (A/T)(5.9L) OUTPUT SPEED SENSOR SIGNAL
29 T25 18LG/WT (A/T)(5.9L) GOVERNOR PRESSURE SENSOR SIGNAL
30 K30 18PK (A/T)(5.9L) TRANSMISSION CONTROL RELAY CONTROL
31 K7 18OR (A/T)(5.9L) 5V SUPPLY
32 - -
POWERTRAIN CONTROL MODULE C3 (DIESEL) - GRAY 32 WAY
CAV CIRCUIT FUNCTION
1 C13 18DB/OR A/C COMPRESSOR CLUTCH RELAY CONTROL
2- -
3 K51 18DB/YL AUTOMATIC SHUT DOWN RELAY CONTROL
4 V36 18TN/RD SPEED CONTROL VACUUM SOLENOID CONTROL
5 V35 18LG/RD SPEED CONTROL VENT SOLENOID CONTROL
6- -
7- -
8- -
9- -
10 - -
11 V32 18YL/RD SPEED CONTROL SUPPLY
12 A142 14DG/OR AUTOMATIC SHUT DOWN RELAY OUTPUT
13 T6 18OR/WT (A/T) OVERDRIVE OFF SWITCH SENSE
14 - -
15 K118 18PK/YL BATTERY TEMPERATURE SENSOR SIGNAL
16 - -
17 - -
18 - -
19 - -
20 - -
21 - -
22 C20 18BR A/C SWITCH SENSE
23 C90 18LG/WT A/C SELECT INPUT
24 V40 18WT/PK BRAKE SWITCH SENSE
25 T125 18DB GENERATOR SOURCE
26 K226 18DB/WT FUEL LEVEL SENSOR SIGNAL
27 D21 18PK/DB SCI TRANSMIT
8W - 80 - 72 8W-80 CONNECTOR PIN-OUTSBR/BE

CONNECTOR NAME/
NUMBERCOLOR LOCATION FIG.
Engine Oil Pressure Sensor
(V8)BK Near Distributor 5
Engine Oil Pressure Sensor
(V10)Near Oil Filter 8
Engine Oil Pressure Sensor
(Diesel)Left Side of Engine 15
Fuel Heater (Diesel) Left Side of Engine 13
Fuel Injection Pump (Diesel) Left Side of Engine, Below ECM 13
Fuel Injector No.1 BK At Fuel Injector 7
Fuel Injector No. 2 BK At Fuel Injector 7, 8
Fuel Injector No. 3 BK At Fuel Injector 7, 8
Fuel Injector No. 4 BK At Fuel Injector 7, 8
Fuel Injector No. 5 BK At Fuel Injector 7, 8
Fuel Injector No. 6 BK At Fuel Injector 7, 8
Fuel Injector No. 7 BK At Fuel Injector 7, 8
Fuel Injector No. 8 BK At Fuel Injector 7, 8
Fuel Injector No. 9 BK At Fuel Injector 8
Fuel Injector No. 10 BK At Fuel Injector 8
Fuel Pump Module (Gas) LTGY At Frame Rail 29
Fuel Tank Module (Diesel) LTGY At Frame Rail N/S
Fuel Transfer Pump (Diesel) Left Rear of Engine Bottom of Pump 13
Generator BK Front of Engine 10, 11
Glove Box Lamp At Glove Box 30
Headlamp Switch C1 BK Left Side of Instrument Panel 30, 34
Headlamp Switch C2 Left Side of Instrument Panel 30, 34
Heated Mirror Switch Center of Instrument Panel 33
High Note Horn BK Front Bumper Right Support 22
Idle Air Control Motor BK On Throttle Body 12
Ignition Coil (5.9L) GY Right Front of Engine 7, 12
Ignition Coil 4 Pack (8.0L) BK Right Side of Engine 12
Ignition Coil 6 Pack (8.0L) BK Right Side of Engine 12
Ignition Switch C1 BK Steering Column 32
Ignition Switch C2 GY Steering Column 32
Instrument Cluster C1 Rear of Instrument Cluster 30
Instrument Cluster C2 Rear of Instrument Cluster 30
Intake Air Heater Relay
(Diesel)Left Fender Side Shield 21
Intake Air Temperature
Sensor (Diesel)Left Rear of Engine 13
Intake Air Temperature
Sensor (Gas)BK On Intake Manifold 7, 8
Joint Connector No. 1 In Power Distribution Center N/S
Joint Connector No. 2 In Power Distribution Center N/S
8W - 91 - 4 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONBR/BE
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

GROUND
NUMBERLOCATION FIG.
G200 Left Cowl 32
G201 Instrument Panel Right Center Support 30, 33
G300 Left Lower Cowl 25
G301 Below Left Rear Speaker 23
G302 At Overhead Console 25
SPLICES
SPLICE
NUMBERLOCATION FIG.
S100 Engine Harness Near T/O to Oil Pressure Sensor 7
S102 Headlamp and Dash Harness, Near T/O to Right Park/Turn Lamp 22
S103 Headlamp and Dash Harness, Near T/O to Left Park/Turn Lamp N/S
S104 Headlamp and Dash Harness, Near T/O to Left Front Headlamp N/S
S105 Headlamp and Dash Harness, In Power Distribution Center 19
S106 Headlamp and Dash Harness, In Power Distribution Center 19
S107 Headlamp and Dash Harness, Near Left Wheel Speed Sensor 19
S108 Headlamp and Dash Harness, Near Daytime Running Lamp Module 19
S109 Battery Harness, In T/O for Engine and Transmission Ground N/S
S110 Headlamp and Dash Harness, Near Left Wheel Speed Sensor 19
S111 Transmission Harness Near T/O to A/C Low Pressure Switch 4
S112 Headlamp and Dash Harness, Near Antilock Brake Controller 19
S113 Headlamp and Dash Harness, Near Antilock Brake Controller 19
S114 Headlamp and Dash Harness, In T/O to Chassis Harness 19
S116(V8) Engine Harness, Near T/O to Fuel Injectors 2
S116 (V10) Engine Harness Rear of Engine 2, 9
S116 (Diesel) Transmission Harness, In T/O to Power Distribution Center 4
S117 (V8) Engine Harness, Near T/O to Fuel Injectors 2
S117 (V10) Engine Harness, Near T/O to fuel Injector No. 8 2, 9
S118 (V8) Engine Harness, Near T/O to Fuel Injectors 2
S118 (V10) Engine Harness, Rear of Engine 2, 9
S119 (V8) Engine Harness, Near T/O to Fuel Injectors 2
S119 (V10) Engine Harness, Rear of Engine 2, 9
S120 (V8) Engine Harness, Near T/O to Fuel Injectors 2
S120 (V10) Engine Harness, Rear of Engine 2, 9, 17
S120 (Diesel) Transmission Harness, Near T/O to A/C Low Pressure Switch 4
S121 (V8) Engine Harness, Near T/O to Fuel Injector No. 5 7
S121 (V10) Engine Harness, Near T/O to Fuel Injector No. 7 9
S122 (V8) Engine Harness, Top of Transmission 6
S122 (V10) Engine Harness, In T/O to Transmission N/S
S123 (V8) Engine Harness, Near T/O to Fuel Injector No. 3 7
S123 (V10) Engine Harness, Near T/O to Fuel Injector No. 3 9
BR/BE8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 9
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

SPLICE
NUMBERLOCATION FIG.
S124 (V8) Engine Harness, Top of Transmission 6
S124 (V10) Engine Harness, In T/O to Transmission N/S
S126 (V8) Engine Harness, Near T/O to Fuel Injector No. 1 7
S126 (V10) Engine Harness, Near T/O to Engine Ground 9, 17
S126 (Diesel) Transmission Harness, Near T/O to Powertrain Control Module 4
S127 (V8) Engine Harness, on Top of Transmission 6
S127 (V10) Engine Harness, Near T/O to Transmission 17
S127 (Diesel) Transmission Harness, Near T/O to A/C Low Pressure Switch 4
S128 (Diesel) Transmission Harness, Near T/O to Power Distribution Center 4
S130 (V8) Engine Harness, Near T/O to Oil Pressure Sensor 7
S131 (V10) Engine Harness, Rear of Engine 9
S134 Fog Lamp Harness, In T/O to Right Fog Lamp N/S
S136 Fog Lamp Harness, In T/O to Right Fog Lamp N/S
S141 Headlamp and Dash Harness, Near T/O to Joint Connector No. 3 22
S143 Headlamp and Dash Harness, Near T/O to Power Distribution
Center19
S144 Headlamp and Dash Harness, Near T/O to Joint Connector No. 3 22
S150 Front Bumper Right Support 22
S151 Left Front Engine Compartment 21
S152 Near Left Front Wheel Speed Sensor
S160 (Diesel) Engine Harness, Near Fuel Transfer Pump N/S
S161 (Diesel) Transmission Harness, In T/O to Power Distribution Center 4
S164 (Diesel) Engine Harness, Near Fuel Transfer Pump N/S
S165 (Diesel) Engine Harness, Near Engine Control Module N/S
S166 (Diesel) Engine Harness, Near Engine Control Module N/S
S167 (Diesel) Engine Harness, Near Fuel Transfer Pump N/S
S168 (Diesel) Engine Harness, Near T/O to Engine Coolant Temoerature Sensor N/S
S170 (Diesel) Engine Harness, In T/O to Engine Control Module N/S
S171 Transmission Harness, In T/O to Power Distribution Cente 4
S172 (Diesel) Transmission Harness, Near T/O to A/C Low Pressure Switch 4
S173 (Diesel) Transmission Harness, Near T/O to A/C Low Pressure Switch 4
S174 (Diesel) Transmission Harness, In T/O to Power Distribution Center 4
S175 Transmission Harness, In T/O to Power Distribution Center 4
S176 Headlamp and Dash Harness, In Power Distribution Center 19
S177 Headlamp and Dash Harness, In T/O to Daytime Running Lamps
Module19
S179 Transmission Harness, In T/O to Power Distribution Center 4
S180 Headlamp and Dash Harness, Near Intake Air Heater Relay 22
S181 Headlamp and Dash Harness, Near Intake Air Heater Relay 22
S182 Headlamp and Dash Harness, In T/O to Daytime Running Lamps
Module19
S183 Headlamp and Dash Harness, In Power Distribution Center 19
8W - 91 - 10 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONBR/BE
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

Fig. 12 IGNITION COIL (GAS ENGINE)
8W - 91 - 20 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONBR/BE
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

(4) Press firmly on the cigar lighter or power out-
let receptacle base until the retaining bosses of the
mount are fully engaged in their receptacles.
(5) Install the cigar lighter knob and element into
the cigar lighter receptacle base, or the protective cap
into the power outlet receptacle base.
(6) Reconnect the battery negative cable.
HORN RELAY
DESCRIPTION
The horn relay is a International Standards Orga-
nization (ISO) micro-relay. The terminal designations
and functions are the same as a conventional ISO
relay. However, the micro-relay terminal orientation
(or footprint) is different, current capacity is lower,
and the relay case dimensions are smaller than those
of the conventional ISO relay.
The horn relay is a electromechanical device that
switches battery current to the horn when the horn
switch or when the high-line or premium Central
Timer Module (CTM) grounds the relay coil. See
Horn Relay in the Diagnosis and Testing section of
this group for more information.
The horn relay is located in the Power Distribution
Center (PDC), in the engine compartment. Refer to
the PDC label for relay identification and location.
If a problem is encountered with a continuously
sounding horn, it can usually be quickly resolved by
removing the horn relay from the PDC until further
diagnosis is completed.
The horn relay cannot be repaired and, if faulty or
damaged, it must be replaced.
DIAGNOSIS AND TESTING - HORN RELAY
The headlamp (or security) relay and the horn
relay are located in the Power Distribution Center
(PDC) in the engine compartment. Each of these
relays can be tested as described in the following pro-
cedure, however the circuits they are used in do vary.
To test the relay circuits, refer to the circuit descrip-
tions and diagrams in Wiring Diagrams.
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO THE RESTRAINTS SECTION OF
THE SERVICE MANUAL BEFORE ATTEMPTING ANY
STEERING WHEEL, STEERING COLUMN, OR
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.Remove the relay (Fig. 13) from the PDC as
described in this group to perform the following tests:
(1) A relay in the de-energized position should
have continuity between terminals 87A and 30, and
no continuity between terminals 87 and 30. If OK, go
to Step 2. If not OK, replace the faulty relay.
(2) Resistance between terminals 85 and 86 (elec-
tromagnet) should be 75   5 ohms. If OK, go to Step
3. If not OK, replace the faulty relay.
(3) Connect a battery to terminals 85 and 86.
There should now be continuity between terminals
30 and 87, and no continuity between terminals 87A
and 30. If OK, test the relay circuits. If not OK,
replace the faulty relay.REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the cover from the Power Distribution
Center (PDC) (Fig. 14).
(3) Refer to the label on the PDC for horn relay
identification and location.
(4) Unplug the horn relay from the PDC.
INSTALLATION
(1) Install the horn relay by aligning the relay ter-
minals with the cavities in the PDC and pushing the
relay firmly into place.
(2) Install the PDC cover.
(3) Connect the battery negative cable.
(4) Test the relay operation.
Fig. 13 Relay Terminals
TERMINAL LEGEND
NUMBER IDENTIFICATION
30 COMMON FEED
85 COIL GROUND
86 COIL BATTERY
87 NORMALLY OPEN
87A NORMALLY CLOSED
8W - 97 - 12 8W-97 POWER DISTRIBUTIONBR/BE
POWER OUTLET (Continued)

HEADLAMP RELAY
DESCRIPTION
The headlamp (or security) relay is a International
Standards Organization (ISO) micro-relay. The termi-
nal designations and functions are the same as a con-
ventional ISO relay. However, the micro-relay
terminal orientation (or footprint) is different, cur-
rent capacity is lower, and the relay case dimensions
are smaller than those of the conventional ISO relay.
The headlamp relay is a electromechanical device
that switches battery current to the headlamps when
the high-line or premium Central Timer Module
(CTM) grounds the relay coil. See Headlamp Relay in
the Diagnosis and Testing section of this group for
more information.
The headlamp (or security) relay is located in the
Power Distribution Center (PDC), in the engine com-
partment. Refer to the PDC label for relay identifica-
tion and location.
The headlamp relay cannot be repaired and, if
faulty or damaged, it must be replaced.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the cover from the Power Distribution
Center (PDC) (Fig. 15).
(3) Refer to the label on the PDC for headlamp (or
security) relay identification and location.
(4) Unplug the headlamp relay from the PDC.
INSTALLATION
(1) Install the headlamp relay by aligning the
relay terminals with the cavities in the PDC and
pushing the relay firmly into place.(2) Install the PDC cover.
(3) Connect the battery negative cable.
(4) Test the relay operation.
MICRO-RELAY
DESCRIPTION
A micro-relay is a conventional International Stan-
dards Organization (ISO) micro relay (Fig. 16).
Relays conforming to the ISO specifications have
common physical dimensions, current capacities, ter-
minal patterns, and terminal functions. The relay is
Fig. 14 Power Distribution Center
1 - COVER
2 - POWER DISTRIBUTION CENTER
Fig. 15 Power Distribution Center
1 - COVER
2 - POWER DISTRIBUTION CENTER
Fig. 16 ISO MICRO RELAY
30 - COMMON FEED
85 - COIL GROUND
86 - COIL BATTERY
87 - NORMALLY OPEN
87A - NORMALLY CLOSED
BR/BE8W-97 POWER DISTRIBUTION 8W - 97 - 13
HORN RELAY (Continued)