1998 DODGE RAM 1500 transfer

C219 - (HEADLAMP AND DASH SIDE)
CAV CIRCUIT
35 -
36 F984 18PK/YL
37 -
38 F951 16PK/LG
39 T917 20YL/TN (DIESEL A/T)
40 -
41 A951 16RD
42 F202 20PK/GY
43 A72 18RD/OR (TRAILER TOW)
44 D16 18WT/OR (GAS)
45 -
46 K77 18BR/WT (MAUAL TRANSFER
CASE)
47 T117 20DG/YL (MANUAL TRANSFER
CASE EXCEPT NGC)
48 A205 18RD/OR
49 A116 18YL/RD
50 -
51 -
52 -
53 R79 20LB/VT (NGC EXCEPT 5.7L ABS)
54 R81 20LB/WT (NGC EXCEPT 5.7L ABS)
55 -
56 F100 18PK/VT
57 R80 20VT/LB (NGC EXCEPT 5.7L ABS)
58 R82 20WT/LB (NGC EXCEPT 5.7L ABS)
59 -
60 A981 14RD
61 F982 14PK/YL
62 -
63 -
64 -
65 -
66 F922 16PK/YL
67 F201 18PK/OR
68 L89 18WT/YL (TRAILER TOW)
69 B29 20DG/WT
70 A919 20RD
71 -
72 D25 20VT/PK
73 F983 20PK/YL
74 -
8W - 80 - 28 8W-80 CONNECTOR PIN-OUTSDR

INSTRUMENT CLUSTER C2 - GRAY 16 WAY
CAV CIRCUIT FUNCTION
1 G194 20VT/LG WASH/BEAM SELECT SWITCH SIGNAL
2 G160 20VT/LG (SLT)8PASSENGER DOOR LOCK SWITCH MUX
3 G161 20VT/DG (SLT) DRIVER DOOR LOCK SWITCH MUX
4 E2 20OR/BR PANEL LAMPS DIMMER SIGNAL
5 L116 20WT/LG HEADLAMP SWITCH SIGNAL
6- -
7 G163 20VT/LB (SLT) DRIVER CYLINDER LOCK SWITCH MUX
8 L12 20WT/OR TURN LAMPS SWITCH SIGNAL
9- -
10 W52 20BR/YL INTERMITTENT WIPER SWITCH SIGNAL
11 T117 20DG/YL TRANS RANGE SENSOR ELECTRONIC CLUSTER 5
VOLT SUPPLY
12 X20 20GY/WT (SLT PREMIUM RADIO) RADIO CONTROL MUX
13 - -
14 - -
15 - -
16 - -
INSTRUMENT CLUSTER C3 - GRAY 26 WAY
CAV CIRCUIT FUNCTION
1 G75 20VT DRIVER DOOR AJAR SWITCH SENSE
2 G77 20VT/GY LEFT REAR DOOR AJAR SWITCH SENSE
3 G76 20VT/YL RIGHT REAR DOOR AJAR SWITCH SENSE
4 G74 20VT/WT PASSENGER DOOR AJAR SWITCH SENSE
5- -
6- -
7 K77 18BR/WT TRANSFER CASE POSITION SENSOR INPUT
8 L900 20WT/YL WIPER/TURN/BEAM SELECT SWITCH RETURN
9 L115 20WT/YL HEADLAMP SWITCH RETURN
10 T917 20YL/TN TRANS RANGE SENSOR ELECTRONIC CLUSTER MUX
11 - -
12 - -
13 Z18 20BK/LB GROUND
14 X3 20DG/VT HORN SWITCH SENSE
15 L50 18WT/TN BRAKE LAMP SWITCH OUTPUT
16 G15 20VT/TN KEY IN IGNITION SWITCH SENSE
17 - -
18 - -
19 D25 20WT/VT PCI BUS
20 G10 20VT/LG SEAT BELT SWITCH SENSE
21 - -
22 B25 20DG/WT PARK BRAKE SWITCH SENSE
23 F983 20PK/YL FUSED IGNITION SWITCH OUTPUT (RUN-ACC)
24 F1 16PK/WT FUSED IGNITION SWITCH OUTPUT (OFF-RUN-START)
25 F21 20PK/DG FUSED IGNITION SWITCH OUTPUT (RUN-START)
26 A114 18GY/RD FUSED B(+)
8W - 80 - 72 8W-80 CONNECTOR PIN-OUTSDR

TRANSFER CASE CONTROL MODULE C1 (ELECTRIC 4x4) - 16 WAY
CAV CIRCUIT FUNCTION
A1 D25 20VT/DB PCI BUS
A2 - -
A3 - -
A4 G92 20VT/OR 4WD LOW INDICATOR
A5 G91 20VT/WT 4WD HIGH INDICATOR
A6 K977 20BR/WT MODE SELECT
A7 T885 20YL/GY MODE SENSOR GROUND
A8 Z905 18BK GROUND
A9 - -
A10 - -
A11 - -
A12 G95 20VT/BR NEUTRAL INDICATOR
A13 G2 20BR/WT IGNITION SWITCH SENSE
A14 D200 20WT/LG MODE SENSOR D
A15 - -
A16 Z905 20BK GROUND
TRANSFER CASE CONTROL MODULE C2 (ELECTRIC 4x4) - 16 WAY
CAV CIRCUIT FUNCTION
B1 D202 20WT/VT MODE SENSOR B
B2 D201 20WT/DG MODE SENSOR A
B3 - -
B4 - -
B5 - -
B6 T41 20YL/DB TRS T41 SENSE
B7 - -
B8 T313 20YL/LG 5 VOLT MODE SENSOR SUPPLY
B9 - -
B10 D203 20WT/BR MODE SENSOR C
B11 - -
B12 - -
B13 - -
B14 - -
B15 - -
B16 T322 20DG/GY 5 VOLT SELECTOR SWITCH SUPPLY
8W - 80 - 100 8W-80 CONNECTOR PIN-OUTSDR

TRANSFER CASE CONTROL MODULE C3 (ELECTRIC 4x4)-4WAY
CAV CIRCUIT FUNCTION
A Z905 16BK GROUND
B A34 16RD/WT FUSED B(+)
C T315 16YL/BR SHIFT MOTOR CONTROL A
D T316 16YL/GY SHIFT MOTOR CONTROL B
TRANSFER CASE MODE SENSOR-6WAY
CAV CIRCUIT FUNCTION
1 D200 20WT/LG MODE SENSOR D
2 T313 20YL/LG 5 VOLT MODE SENSOR SUPPLY
3 D202 20WT/VT MODE SENSOR B
4 T885 20YL/GY MODE SENSOR GROUND
5 D201 20WT/DG MODE SENSOR A
6 D203 20WT/BR MODE SENSOR C
TRANSFER CASE SELECTOR SWITCH - 12 WAY
CAV CIRCUIT FUNCTION
1 T322 20DG/GY 5 VOLT SELECTOR SWITCH SUPPLY
2 G2 20BR/WT IGNITION SWITCH SENSE
3- -
4 G95 20VT/BR NEUTRAL INDICATOR
5 K977 20BR/WT MODE SELECT
6 E11 20OR/DB PANEL LAMPS DRIVER
7 F21 20PK/DG FUSED IGNITION SWITCH OUTPUT (RUN-START)
8 G92 20VT/OR 4WD LOW INDICATOR
9 G91 20VT/WT 4WD HIGH INDICATOR
10 - -
11 Z905 20BK GROUND
12 - -
TRANSFER CASE SHIFT MOTOR-2WAY
CAV CIRCUIT FUNCTION
1 T316 16YL/GY SHIFT MOTOR CONTROL B
2 T315 16YL/BR SHIFT MOTOR CONTROL A
DR8W-80 CONNECTOR PIN-OUTS 8W - 80 - 101

8W-91 CONNECTOR/GROUND/SPLICE LOCATION
TABLE OF CONTENTS
page
CONNECTOR/GROUND/SPLICE LOCATION
DESCRIPTION..........................1
CONNECTOR/GROUND/SPLICE
LOCATION
DESCRIPTION
This section provides illustrations identifying con-
nector, ground, and splice locations in the vehicle.
Connector, ground, and splice indexes are provided.Use the wiring diagrams in each section for connec-
tor, ground, and splice identification. Refer to the
index for the proper figure number. For items that
are not shown in this section N/S is placed in the
Fig. column.
CONNECTORS
CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
4WD Switch (Manual Transfer
Case)BK Near T/O for Backup Lamp Switch 16, 17, 19
A/C Compressor Clutch BK At A/C Compressor 3, 6, 7, 10
A/C Pressure Transducer BK Left Side of A/C Compressor 6, 7, 10
A/C-Heater Control C1 BK Center of Instrument Panel 34, 35, 36
A/C-Heater Control C2 BK Center of Instrument Panel 34, 35
Accelerator Pedal Position Sensor Under Battery Tray 22, 27
Adjustable Pedal Motor WT Left of Instrument Panel 31
Adjustable Pedal Switch BL Left of Instrument Panel 35, 38
Airbag Control Module C1 YL Lower Center of Instrument Panel 35, 36
Airbag Control Module C2 YL Lower Center of Instrument Panel 44, 46
Airbag Control Module-Left Side
ImpactYL Left B-Pillar 44, 46
Airbag Control Module-Right Side
ImpactYL Right B-Pillar 45, 47
Airbag-Driver Squib 1 YL On Steering Wheel N/S
Airbag-Left Curtain YL Top Left B-Pillar 44, 46
Airbag-Passenger YL Right Front of Instrument Panel 35, 39
Airbag-Right Curtain YL Top Right B-Pillar 45, 47
Ambient Temperature Sensor BK Left Rear of Hood 23, 29
Amplifier Audio C1 GY Top Center of Instrument Panel 35, 39
Amplifier Audio C2 GY Top Center of Instrument Panel 35, 39
Ashtray Lamp Center Stack 35
Automatic Day/Night Mirror (Except
Base)BK Top Center of Windshield N/S
Backup Lamp Switch BK Left Rear of Transmission 12, 13, 17, 19
DR8W-91 CONNECTOR/GROUND/SPLICE LOCATION 8W - 91 - 1

CONNECTOR NAME/NUMBER COLOR LOCATION FIG.
Speed Control Switch-Right (ETC) WT At Steering Wheel N/S
Starter Solenoid Left Engine 23
Tail/Stop/Turn Signal Lamp-Left BK At Lamp 50, 51
Tail/Stop/Turn Signal Lamp-Right BK At Lamp 50, 51
Throttle Position Sensor NAT Throttle Body 6
Trailer Tow Connector BK At Trailer Hitch 51
Trailer Tow Connector-Add On BK At Trailer Hitch 51, 53
Transfer Case Control Module C1 BK Left Side of Instrument Panel 35, 38
Transfer Case Control Module C2 GY Left Side of Instrument Panel 35, 38
Transfer Case Control Module C3 BK Left Side of Instrument Panel 35, 38
Transfer Case Mode Sensor BK Left Front Side of Transfer Case 13, 14, 16, 20
Transfer Case Position Sensor BK Front Middle of Transfer Case 20
Transfer Case Selector Switch BK Center of Instrument Panel 11, 12, 33, 35, 36
Transfer Case Shift Motor BK Left Rear of Transmission 13, 14, 20
Transmission Range Sensor BK Left side of Transmission 11, 14
Transmission Solenoid Assembly BK Left Side of Transmission 14, 11
Transmission Solenoid/TRS
Assembly (3.7L/4.7L)BK Left Side of Transmission 15, 16
Underhood Lamp BK Underside of Hood 29
Vacuum Pump (Diesel) Right Rear Engine Compartment 21
Vistronic Fan Drive Front Engine Compartment 28
Washer Fluid Level Switch BK At Reservoir 21, 23, 26, 28
Washer Pump Motor-Front BK At Washer Fluid Reservoir 21, 23, 26, 28
Water In Fuel Sensor (Diesel) BK Right Side Engine 10
Wheel Speed Sensor-Left Front BK Left Rear Lower Side of Engine
Compartment22, 29
Wheel Speed Sensor-Rear BK Right Rear of Body 51
Wheel Speed Sensor-Right Front GY Right Rear Lower Side of Engine
Compartment21
Wiper Motor-Front BK Left Side of Cowl 22, 25
8W - 91 - 8 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONDR
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

Fig. 20 LEFT FRONT TRANSFER CASE
8W - 91 - 30 8W-91 CONNECTOR/GROUND/SPLICE LOCATIONDR
CONNECTOR/GROUND/SPLICE LOCATION (Continued)

REMOVAL
(1) Disconnect negative cable from battery.
(2)
Remove the resonator assemble and air inlet hose.
(3) Disconnect injector connectors and un-clip the
injector harness.
(4) Route injector harness in front of cylinder head
cover.
(5) Disconnect the left side breather tube and
remove the breather tube.
(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
9 - 28 ENGINE - 3.7LDR
CYLINDER HEAD COVER(S) (Continued)