1998 DODGE RAM 1500 Transmission wiring

have not been met. This is in an attempt to notify
the driver that the transmission needs to be put into
NEUTRAL, the vehicle speed is too great, or some
other condition outlined (other than a diagnostic fail-
ure that would prevent this shift) elsewhere (Refer to
8 - ELECTRICAL/ELECTRONIC CONTROL MOD-
ULES/TRANSFER CASE CONTROL MODULE -
OPERATION) is not met. Note that this flashing will
continue indefinitely until the conditions are eventu-
ally met, or the selector switch position is changed,
or if diagnostic routines no longer allow the
requested shift.
²
If the driver attempts to make a shift into transfer
case NEUTRAL, and any of the driver controllable con-
ditions are not met, the request will be ignored until all
of the conditions are met or until the NEUTRAL select
button is released. Additionally the neutral lamp will
flash, or begin to flash while the button is depressed
and operator controllable conditions are not being met.
All of the LED's except the Neutral will flash if any of
the operator controllable conditions for shifting are not
met while the Neutral button is depressed. This9toggle9
type of feature is necessary because the TCCM would
interpret another request immediately after the shift
into transfer case NEUTRAL has completed.
²No LED's illuminated indicate a fault in the
transfer case control system.
SHIFT MOTOR
DESCRIPTION
The shift motor (Fig. 96) consists of a permanent
magnet D.C. motor with gear reduction to convert a
high speed-low torque device into a low speed-high
torque device. The output of the device is coupled to
a shaft which internally moves the mode and range
forks that change the transfer case operating ranges.
The motor is rated at 25 amps maximum at 72É F
with 10 volts at the motor leads.
OPERATION
The transfer case shift motor responds to the
Transfer Case Control Module (TCCM) commands to
move the transfer case shift sector bi-directionally, as
required, to obtain the transfer case operating mode
indicated by the instrument panel mounted selector
switch.
REMOVAL
NOTE: New shift motor assemblies are shipped in
the 2WD/AWD position. If a new shift motor assem-
bly will be installed, it will be necessary to shift the
transfer case to the 2WD/AWD position prior to
motor removal.(1) Raise the vehicle on a suitable hoist.
(2) Disengage the wiring connectors from the shift
motor and mode sensor.
(3) Remove the bolts holding the shift motor and
mode sensor assembly onto the transfer case.
(4) Separate the shift motor and mode sensor
assembly from the transfer case.
INSTALLATION
(1) Verify that the shift sector o-ring is clean and
properly positioned over the shift sector and against
the transfer case.
NOTE: Verify that the shift motor position and sec-
tor shaft orientation are aligned. It may be neces-
sary to manually shift the transfer case if the shift
motor and sector shaft are not aligned.
(2) Position the shift motor and mode sensor
assembly onto the transfer case.
(3) Install the bolts to hold the assembly onto the
transfer case. Tighten the bolts to 16-24 N´m (12-18
ft.lbs.).
CAUTION: If the original shift motor and mode sen-
sor assembly bolts are reused, be sure to use
MoparTLock & Seal or LoctiteŸ 242 to replenish
the lock patch material originally found on the bolts
(4) Engage the wiring connectors to the shift motor
and mode sensor.
(5) Refill the transfer case as necessary.
(6) Lower vehicle and verify transfer case
operation.
Fig. 96 Shift Motor - Shown Inverted - Typical
1 - SHIFT MOTOR
DRTRANSFER CASE - NV273 21 - 575
SELECTOR SWITCH (Continued)

After the system has been tested for leaks and
evacuated, a refrigerant (R-134a) charge can be
injected into the system.
NOTE: When connecting the service equipment
coupling to the line fitting, verify that the valve of
the coupling is fully closed. This will reduce the
amount of effort required to make the connection.
(1) If using a separate vacuum pump close all
valves before disconnecting pump. Connect manifold
gauge set to the A/C service ports.
NOTE: Always refer to the underhood HVAC Speci-
fication label for the refrigerant fill level of the vehi-
cle being serviced.
(2) Measure refrigerant (refer to capacities). Refer
to the instructions provided with the equipment
being used.
(3) Verify engine is shut off. Open the suction and
discharge valves. Open the charge valve to allow the
refrigerant to flow into the system. When the trans-
fer of refrigerant has stopped, close the suction and
discharge valve.
(4) If all of the charge did not transfer from the
dispensing device, put vehicle controls into the fol-
lowing mode:
²Automatic transmission in park or manual
transmission in neutral
²Engine at idle
²A/C mode control set to outside air
²A/C mode control set to panel mode
²A/C temperature control set to full cool
²Blower motor control set on highest speed
²Vehicle windows closed
If the A/C compressor does not engage, test the
compressor clutch control circuit and correct any fail-
ure (Refer to 8 - ELECTRICAL/WIRING DIAGRAM
INFORMATION - DIAGNOSIS AND TESTING).
(5) Open the suction valve to allow the remaining
refrigerant to transfer to the system.
WARNING: TAKE CARE NOT TO OPEN THE DIS-
CHARGE (HIGH-PRESSURE) VALVE AT THIS TIME.
(6) Close all valves and test the A/C system perfor-
mance.
(7) Disconnect the charging station or manifold
gauge set. Install the service port caps.
REFRIGERANT CHARGE CAPACITY
The R-134a refrigerant system charge capacity for
this vehicle can be found on the underhood HVAC
specfication tag.
A/C COMPRESSOR
DESCRIPTION
DESCRIPTION - A/C COMPRESSOR
The A/C system on models equipped with the 5.9L
engine use a Sanden SD-7 reciprocating swash plate-
type compressor. This compressor has a fixed dis-
placement of 165 cubic centimeter (10.068 cubic
inches) and has both the suction and discharge ports
located on the cylinder head.
The A/C system on models equipped with the 3.7L,
4.7L and 5.7L engines use a Denso 10S17 reciprocat-
ing swash plate-type compressor. This compressor
has a fixed displacement of 170 cubic centimeter and
has both the suction and discharge ports located on
the cylinder head.
A label identifying the use of R-134a refrigerant is
located on both A/C compressors.
DESCRIPTION - HIGH PRESSURE RELIEF
VALVE
A high pressure relief valve is located on the com-
pressor cylinder head, which is on the rear of the
compressor. This mechanical valve is designed to
vent refrigerant from the system to protect against
damage to the compressor and other system compo-
nents, caused by condenser air flow restriction or an
overcharge of refrigerant.
OPERATION
OPERATION - A/C COMPRESSOR
The A/C compressor is driven by the engine
through an electric clutch, drive pulley and belt
arrangement. The compressor is lubricated by refrig-
erant oil that is circulated throughout the refrigerant
system with the refrigerant.
The compressor draws in low-pressure refrigerant
vapor from the evaporator through its suction port. It
then compresses the refrigerant into a high-pressure,
high-temperature refrigerant vapor, which is then
pumped to the condenser through the compressor dis-
charge port.
The compressor cannot be repaired. If faulty or
damaged, the entire compressor assembly must be
replaced. The compressor clutch, pulley and clutch
coil are available for service.
OPERATION - HIGH PRESSURE RELIEF VALVE
The high pressure relief valve vents the system
when a discharge pressure of 3445 to 4135 kPa (500
to 600 psi) or above is reached. The valve closes
24 - 48 PLUMBINGDR
PLUMBING (Continued)

TOOLS - POWER DISTRIBUTION
SYSTEMS, SPECIAL................8W-97-2
TOOLS - POWER STEERING GEAR,
SPECIAL...........................19-23
TOOLS - RE TRANSMISSION, SPECIAL . . 21-191
TOOLS - RFE TRANSMISSION, SPECIAL . . 21-359
TOOLS - STEERING LINKAGE, SPECIAL . . . 19-35
TOOLS - STEERING, SPECIAL............19-5
TOOLS - TRANSFER CASE NV271/NV273,
SPECIAL....................21-474,21-569
TOOLS - WHEEL ALIGNMENT, SPECIAL.....2-7
TOOLS - WIRING/TERMINAL, SPECIAL . 8W-01-10
TOOLS, FRONT AXLE - 9 1/4 AA -
SPECIAL............................3-64
TOOLS, FRONT AXLE - C205F - SPECIAL . . . 3-40
TOOLS, HALF SHAFT - SPECIAL..........3-21
TOOLS, MANUAL TRANSMISSION -
NV3500 - SPECIAL...................21-40
TOOLS, MANUAL TRANSMISSION -
NV4500 - SPECIAL...................21-81
TOOLS, MANUAL TRANSMISSION -
NV5600 - SPECIAL..................21-123
TOOLS, PROPELLER SHAFT - SPECIAL.....3-6
TOOLS, REAR AXLE - 10 1/2 AA -
SPECIAL...........................3-120
TOOLS, REAR AXLE - 11 1/2 AA -
SPECIAL...........................3-148
TOOLS, REAR AXLE - 9 1/4 - SPECIAL.....3-90
TOP COVER - INSTALLATION,
INSTRUMENT PANEL..................23-59
TOP COVER - REMOVAL, INSTRUMENT
PANEL.............................23-58
TORSION BAR - DESCRIPTION...........2-26
TORSION BAR - INSTALLATION..........2-27
TORSION BAR - OPERATION.............2-26
TORSION BAR - REMOVAL..............2-26
TORSION BAR CROSS MEMBER
BUSHING - INSTALLATION..............2-15
TORSION BAR CROSSMEMBER
BUSHING - REMOVAL..................2-13
TOUCH-UP - DESCRIPTION, PAINT.......23-74
TOUCH-UP - STANDARD PROCEDURE,
PAINT.............................23-74
TOW HOOK ASSEMBLY - INSTALLATION,
FRONT.............................13-23
TOW HOOK ASSEMBLY - REMOVAL,
FRONT.............................13-23
TOW WIRING - DESCRIPTION, TRAILER . . 8L-24
TOW/HAUL INDICATOR - DESCRIPTION . . . 8J-39
TOW/HAUL INDICATOR - OPERATION.....8J-39
TOW/HAUL OVERDRIVE SWITCH -
DESCRIPTION................21-261,21-392
TOW/HAUL OVERDRIVE SWITCH -
INSTALLATION................21-262,21-393
TOW/HAUL OVERDRIVE SWITCH -
OPERATION..................21-262,21-392
TOW/HAUL OVERDRIVE SWITCH -
REMOVAL...................21-262,21-392
TOWING - STANDARD PROCEDURE.......0-21
TRACK - DESCRIPTION, POWER SEAT....8N-16
TRACK - DIAGNOSIS AND TESTING,
POWER SEAT.......................8N-17
TRACK - INSTALLATION, POWER SEAT . . . 8N-17
TRACK - INSTALLATION, SEAT..........23-83
TRACK - OPERATION, POWER SEAT.....8N-16
TRACK - REMOVAL, POWER SEAT.......8N-17
TRACK - REMOVAL, SEAT..............23-83
TRACK BAR - INSTALLATION...........19-38
TRACK BAR - REMOVAL...............19-38
TRAC-RITE - ASSEMBLY, DIFFERENTIAL . . 3-133,
3-161
TRAC-RITE - CLEANING, DIFFERENTIAL . . 3-132,
3-160
TRAC-RITE - DESCRIPTION,
DIFFERENTIAL..................3-131,3-158
TRAC-RITE - DISASSEMBLY,
DIFFERENTIAL..................3-131,3-158
TRAC-RITE - INSPECTION, DIFFERENTIAL . 3-132,
3-160
TRAC-RITE - OPERATION, DIFFERENTIAL . 3-131,
3-158
TRAILER HITCH - INSTALLATION
........13-25
TRAILER HITCH - REMOVAL
............13-25
TRAILER TOW WIRING - DESCRIPTION
. . . 8L-24
TRANS COOLER - 5.9L DIESEL -
DESCRIPTION
........................7-68
TRANS COOLER - 5.9L DIESEL -
OPERATION
..........................7-69TRANS COOLER - DESCRIPTION.........7-67
TRANS COOLER - INSTALLATION.........7-68
TRANS COOLER - OPERATION...........7-67
TRANS COOLER - REMOVAL.............7-68
TRANS TEMP INDICATOR -
DESCRIPTION.......................8J-40
TRANS TEMP INDICATOR - OPERATION . . . 8J-40
TRANSDUCER - DESCRIPTION, A/C
PRESSURE.........................24-15
TRANSDUCER - DIAGNOSIS AND
TESTING, A/C PRESSURE..............24-16
TRANSDUCER - INSTALLATION, A/C
PRESSURE.........................24-16
TRANSDUCER - OPERATION, A/C
PRESSURE.........................24-16
TRANSDUCER - REMOVAL, A/C
PRESSURE.........................24-16
TRANSFER CASE - DESCRIPTION..........0-4
TRANSFER CASE - NV241 GENII -
ASSEMBLY.........................21-428
TRANSFER CASE - NV241 GENII -
CLEANING.........................21-426
TRANSFER CASE - NV241 GENII -
DESCRIPTION......................21-415
TRANSFER CASE - NV241 GENII -
DIAGNOSIS AND TESTING............21-416
TRANSFER CASE - NV241 GENII -
DISASSEMBLY......................21-417
TRANSFER CASE - NV241 GENII -
INSPECTION.......................21-426
TRANSFER CASE - NV241 GENII -
INSTALLATION.......................21-438
TRANSFER CASE - NV241 GENII -
OPERATION........................21-415
TRANSFER CASE - NV241 GENII -
REMOVAL.........................21-417
TRANSFER CASE - NV243 - ASSEMBLY . . 21-496
TRANSFER CASE - NV243 - CLEANING . . 21-493
TRANSFER CASE - NV243 -
DESCRIPTION......................21-482
TRANSFER CASE - NV243 - DIAGNOSIS
AND TESTING......................21-483
TRANSFER CASE - NV243 -
DISASSEMBLY......................21-484
TRANSFER CASE - NV243 - INSPECTION . 21-493
TRANSFER CASE - NV243 -
INSTALLATION......................21-505
TRANSFER CASE - NV243 - OPERATION . 21-483
TRANSFER CASE - NV243 - REMOVAL . . . 21-484
TRANSFER CASE - NV244 - DIAGNOSIS
AND TESTING......................21-513
TRANSFER CASE - NV244 GENII -
ASSEMBLY.........................21-525
TRANSFER CASE - NV244 GENII -
CLEANING.........................21-523
TRANSFER CASE - NV244 GENII -
DESCRIPTION......................21-512
TRANSFER CASE - NV244 GENII -
DISASSEMBLY......................21-514
TRANSFER CASE - NV244 GENII -
INSPECTION.......................21-523
TRANSFER CASE - NV244 GENII -
INSTALLATION......................21-534
TRANSFER CASE - NV244 GENII -
OPERATION........................21-513
TRANSFER CASE - NV244 GENII -
REMOVAL.........................21-514
TRANSFER CASE - NV271 - ASSEMBLY . . 21-461
TRANSFER CASE - NV271 - CLEANING . . 21-459
TRANSFER CASE - NV271 -
DESCRIPTION......................21-447
TRANSFER CASE - NV271 - DIAGNOSIS
AND TESTING......................21-448
TRANSFER CASE - NV271 -
DISASSEMBLY......................21-450
TRANSFER CASE - NV271 - INSPECTION . 21-459
TRANSFER CASE - NV271 -
INSTALLATION......................21-473
TRANSFER CASE - NV271 - OPERATION . 21-448
TRANSFER CASE - NV271 - REMOVAL . . . 21-450
TRANSFER CASE - NV273 - ASSEMBLY
. . 21-556
TRANSFER CASE - NV273 - CLEANING
. . 21-554
TRANSFER CASE - NV273 -
DESCRIPTION
......................21-542
TRANSFER CASE - NV273 - DIAGNOSIS
AND TESTING
......................21-543
TRANSFER CASE - NV273 -
DISASSEMBLY
......................21-544TRANSFER CASE - NV273 - INSPECTION . 21-554
TRANSFER CASE - NV273 -
INSTALLATION......................21-568
TRANSFER CASE - NV273 - OPERATION . 21-543
TRANSFER CASE - NV273 - REMOVAL . . . 21-544
TRANSFER CASE CONTROL MODULE -
DESCRIPTION.......................8E-16
TRANSFER CASE CONTROL MODULE -
OPERATION.........................8E-16
TRANSFER CASE, NV241 GENII........21-438
TRANSFER CASE, NV241/NV243........21-439
TRANSFER CASE, NV243.......21-505,21-506
TRANSFER CASE, NV244 GENII........21-535
TRANSFER CASE, NV271.............21-473
TRANSFER CASE NV271/NV273, SPECIAL
TOOLS......................21-474,21-569
TRANSFER CASE, NV273.............21-568
TRANSFER CASE SKID PLATE -
INSTALLATION.......................13-26
TRANSFER CASE SKID PLATE -
REMOVAL..........................13-26
TRANSFER PUMP - DESCRIPTION, FUEL . . 14-64
TRANSFER PUMP - INSTALLATION, FUEL . 14-65
TRANSFER PUMP - OPERATION, FUEL....14-64
TRANSFER PUMP - REMOVAL, FUEL.....14-64
TRANSMISSION - 45RFE/545RFE -
DESCRIPTION, AUTOMATIC............21-312
TRANSMISSION - 45RFE/545RFE -
OPERATION, AUTOMATIC.............21-313
TRANSMISSION - 48RE - DESCRIPTION,
AUTOMATIC........................21-132
TRANSMISSION - 48RE - OPERATION,
AUTOMATIC........................21-134
TRANSMISSION - CLEANING..........21-106
TRANSMISSION - DESCRIPTION,
MANUAL.............................0-4
TRANSMISSION - DIAGNOSIS AND
TESTING, AUTOMATIC..........21-140,21-314
TRANSMISSION - NV3500 - ASSEMBLY,
MANUAL...........................21-17
TRANSMISSION - NV3500 - CLEANING,
MANUAL...........................21-15
TRANSMISSION - NV3500 -
DESCRIPTION, MANUAL................21-1
TRANSMISSION - NV3500 - DIAGNOSIS
AND TESTING, MANUAL................21-3
TRANSMISSION - NV3500 -
DISASSEMBLY, MANUAL................21-4
TRANSMISSION - NV3500 -
INSPECTION, MANUAL................21-16
TRANSMISSION - NV3500 -
INSTALLATION, MANUAL..............21-39
TRANSMISSION - NV3500 - OPERATION,
MANUAL............................21-1
TRANSMISSION - NV3500 - REMOVAL,
MANUAL............................21-3
TRANSMISSION - NV3500 - SPECIAL
TOOLS, MANUAL.....................21-40
TRANSMISSION - NV3500 -
SPECIFICATIONS, MANUAL.............21-40
TRANSMISSION - NV4500 - ASSEMBLY,
MANUAL...........................21-63
TRANSMISSION - NV4500 - CLEANING,
MANUAL...........................21-62
TRANSMISSION - NV4500 -
DESCRIPTION, MANUAL...............21-43
TRANSMISSION - NV4500 - DIAGNOSIS
AND TESTING, MANUAL...............21-44
TRANSMISSION - NV4500 -
DISASSEMBLY, MANUAL...............21-46
TRANSMISSION - NV4500 -
INSPECTION, MANUAL................21-62
TRANSMISSION - NV4500 -
INSTALLATION, MANUAL..............21-80
TRANSMISSION - NV4500 - OPERATION,
MANUAL...........................21-43
TRANSMISSION - NV4500 - REMOVAL,
MANUAL...........................21-44
TRANSMISSION - NV4500 - SPECIAL
TOOLS, MANUAL
.....................21-81
TRANSMISSION - NV4500 -
SPECIFICATIONS, MANUAL
.............21-81
TRANSMISSION - NV5600 - ASSEMBLY,
MANUAL
..........................21-106
TRANSMISSION - NV5600 -
DESCRIPTION, MANUAL
...............21-88
TRANSMISSION - NV5600 - DIAGNOSIS
AND TESTING, MANUAL
...............21-90
34 INDEXDR
Description Group-Page Description Group-Page Description Group-Page