cruise control DODGE RAM 2003 Service User Guide

12.0 volts (but less than 16.0 volts), or until the igni-
tion switch is turned to the Off position, whichever
occurs first.
²System Voltage High Message- Each time
the cluster receives a message from the PCM or ECM
indicating the electrical system voltage is greater
than about 16.0 volts, the check gauges indicator will
be illuminated. The indicator remains illuminated
until the cluster receives a message from the PCM or
ECM indicating the electrical system voltage is less
than about 15.5 volts (but greater than 11.5 volts), or
until the ignition switch is turned to the Off position,
whichever occurs first.
²Actuator Test- Each time the cluster is put
through the actuator test, the check gauges indicator
will be turned on, then off again during the bulb
check portion of the test to confirm the functionality
of the LED and the cluster control circuitry.
On vehicles with a gasoline engine, the PCM con-
tinually monitors the engine temperature, oil pres-
sure, and electrical system voltage, then sends the
proper messages to the instrument cluster. On vehi-
cles with a diesel engine, the ECM continually mon-
itors the engine temperature, oil pressure, and
electrical system voltage, then sends the proper mes-
sages to the instrument cluster. For further diagnosis
of the check gauges indicator or the instrument clus-
ter circuitry that controls the LED, (Refer to 8 -
ELECTRICAL/INSTRUMENT CLUSTER - DIAGNO-
SIS AND TESTING). For proper diagnosis of the
PCM, the ECM, the PCI data bus, or the electronic
message inputs to the instrument cluster that control
the check gauges indicator, a DRBIIItscan tool is
required. Refer to the appropriate diagnostic infor-
mation.
CRUISE INDICATOR
DESCRIPTION
A cruise indicator is standard equipment on all
instrument clusters. However, on vehicles not
equipped with the optional speed control system, this
indicator is electronically disabled. The cruise indica-
tor consists of the word ªCRUISEº, which appears in
the lower portion of the gear selector indicator Vacu-
um-Fluorescent Display (VFD) unit. The VFD is sol-
dered onto the cluster electronic circuit board and is
visible through a window with a smoked clear lens
located on the lower edge of the speedometer gauge
dial face of the cluster overlay. The dark lens over
the VFD prevents the indicator from being clearly
visible when it is not illuminated. The word
ªCRUISEº appears in a blue-green color and at the
same lighting level as the gear selector indicator
information when it is illuminated by the instrumentcluster electronic circuit board. The cruise indicator
is serviced as a unit with the VFD in the instrument
cluster.
OPERATION
The cruise indicator gives an indication to the vehi-
cle operator when the speed control system is turned
On, regardless of whether the speed control is
engaged. This indicator is controlled by the instru-
ment cluster circuit board based upon cluster pro-
gramming and electronic messages received by the
cluster from the Powertrain Control Module (PCM)
over the Programmable Communications Interface
(PCI) data bus. The cruise indicator is completely
controlled by the instrument cluster logic circuit, and
that logic will only allow this indicator to operate
when the instrument cluster receives a battery cur-
rent input on the fused ignition switch output (run-
start) circuit. Therefore, the indicator will always be
off when the ignition switch is in any position except
On or Start. The indicator only illuminates when it is
switched to ground by the instrument cluster cir-
cuitry. The instrument cluster will turn on the cruise
indicator for the following reasons:
²Cruise Lamp-On Message- Each time the
cluster receives a cruise lamp-on message from the
PCM indicating the speed control system has been
turned On, the cruise indicator is illuminated. The
indicator remains illuminated until the cluster
receives a cruise lamp-off message from the PCM or
until the ignition switch is turned to the Off position,
whichever occurs first.
²Actuator Test- Each time the cluster is put
through the actuator test, the cruise indicator will be
turned on, then off again during the VFD portion of
the test to confirm the functionality of the VFD and
the cluster control circuitry.
The PCM continually monitors the speed control
switches to determine the proper outputs to the
speed control servo. The PCM then sends the proper
cruise indicator lamp-on and lamp-off messages to
the instrument cluster. For further diagnosis of the
cruise indicator or the instrument cluster circuitry
that controls the indicator, (Refer to 8 - ELECTRI-
CAL/INSTRUMENT CLUSTER - DIAGNOSIS AND
TESTING). For proper diagnosis of the speed control
system, the PCM, the PCI data bus, or the electronic
message inputs to the instrument cluster that control
the cruise indicator, a DRBIIItscan tool is required.
Refer to the appropriate diagnostic information.
8J - 22 INSTRUMENT CLUSTERDR
CHECK GAUGES INDICATOR (Continued)

HIGH-PRESSURE FUEL LINE LEAKS -
DIAGNOSIS AND TESTING.............14-69
HINGE - INSTALLATION.....23-16,23-22,23-31,
23-46
HINGE - INSTALLATION, CENTER SEAT
BACK..............................23-80
HINGE - REMOVAL....23-16,23-22,23-31,23-46
HINGE - REMOVAL, CENTER SEAT BACK . . 23-79
HINGE COVER - INSTALLATION, CENTER
SEAT BACK INERTIA..................23-78
HINGE COVER - REMOVAL, CENTER
SEAT BACK INERTIA..................23-78
HITCH - INSTALLATION, TRAILER........13-25
HITCH - REMOVAL, TRAILER...........13-25
HOAT COOLANT - DESCRIPTION..........7-37
HOISTING - STANDARD PROCEDURE......0-14
HOLDDOWN - DESCRIPTION, BATTERY . . . 8F-14
HOLDDOWN - INSTALLATION, BATTERY . . . 8F-14
HOLDDOWN - OPERATION, BATTERY.....8F-14
HOLDDOWN - REMOVAL, BATTERY......8F-14
HOLDER - INSTALLATION, CUP.........23-52
HOLDER - REMOVAL, CUP.............23-52
HOLDING CLUTCHES - DESCRIPTION....21-546
HOLDING CLUTCHES - OPERATION.....21-546
HOLE PLUG - INSTALLATION, CAMSHAFT
CORE..............................9-201
HOLE PLUG - REMOVAL, CAMSHAFT
CORE..............................9-200
HOLE REPAIR - DESCRIPTION,
THREADED........................Intro.-9
HONING - STANDARD PROCEDURE,
CYLINDER BORE.......9-126,9-233,9-360,9-37
HOOD - INSTALLATION................23-47
HOOD - REMOVAL....................23-47
HOOK - INSTALLATION, COAT...........23-67
HOOK - REMOVAL, COAT..............23-67
HOOK ASSEMBLY - INSTALLATION,
FRONT TOW........................13-26
HOOK ASSEMBLY - REMOVAL, FRONT
TOW ..............................13-26
HORN - DIAGNOSIS AND TESTING.......8H-1
HORN - INSTALLATION.................8H-2
HORN - REMOVAL....................8H-2
HORN SWITCH - DESCRIPTION..........8H-2
HORN SWITCH - DIAGNOSIS AND
TESTING............................8H-2
HORN SYSTEM - DESCRIPTION..........8H-1
HORN SYSTEM - DIAGNOSIS AND
TESTING............................8H-1
HORN SYSTEM - OPERATION............8H-1
HOSE - GEAR TO COOLER -
INSTALLATION, RETURN..........19-43,19-44
HOSE - GEAR TO COOLER - REMOVAL,
RETURN............................19-43
HOSE - INSTALLATION, FRONT BRAKE......5-9
HOSE - INSTALLATION, PRESSURE . 19-43,19-44
HOSE - INSTALLATION, REAR BRAKE.......5-9
HOSE - REMOVAL, FRONT...............5-9
HOSE - REMOVAL, PRESSURE.....19-43,19-44
HOSE - REMOVAL, REAR BRAKE..........5-8
HOSE - RESERVOIR TO COOLER -
INSTALLATION, RETURN..........19-43,19-44
HOSE - RESERVOIR TO COOLER -
REMOVAL, RETURN.............19-43,19-44
HOSE ASSEMBLY - INSTALLATION, REAR
TUBE................................5-9
HOSE ASSEMBLY - REMOVAL, REAR
TUBE................................5-8
HOSE CLAMPS - DESCRIPTION...........7-3
HOSE CLAMPS - OPERATION.............7-5
HOSE WITH AIR CONDITIONING -
INSTALLATION, WATER PUMP BYPASS....7-70
HOSE WITH AIR CONDITIONING -
REMOVAL, WATER PUMP BYPASS........7-68
HOSE WITHOUT AIR CONDITIONING -
INSTALLATION, WATER PUMP BYPASS....7-70
HOSE WITHOUT AIR CONDITIONING -
REMOVAL, WATER PUMP BYPASS........7-69
HOSES/LINES/TUBES PRECAUTIONS -
CAUTION, REFRIGERANT..............24-33
HOSES/TUBES - DESCRIPTION, WASHER . 8R-11
HOSES/TUBES - OPERATION, WASHER . . . 8R-11
HOUSING - ASSEMBLY, HVAC
...........24-28
HOUSING - DIAGNOSIS AND TESTING,
CLUTCH
..............................6-8
HOUSING - DISASSEMBLY, HVAC
........24-28
HOUSING - INSTALLATION, CLUTCH
......6-10
HOUSING - INSTALLATION, GEAR
........9-349HOUSING - INSTALLATION, HVAC........24-29
HOUSING - INSTALLATION, ROCKER.....9-304
HOUSING - REMOVAL, CLUTCH..........6-10
HOUSING - REMOVAL, GEAR...........9-348
HOUSING - REMOVAL, HVAC...........24-27
HOUSING - REMOVAL, ROCKER.........9-304
HOUSING BUSHING - INSTALLATION,
EXTENSION........................21-200
HOUSING BUSHING - REMOVAL,
EXTENSION........................21-200
HOUSING BUSHING AND SEAL -
INSTALLATION, EXTENSION.....21-616,21-682
HOUSING BUSHING AND SEAL -
REMOVAL, EXTENSION.........21-616,21-682
HOUSING COVER - INSTALLATION, GEAR . 9-350
HOUSING COVER - REMOVAL, GEAR.....9-349
HOUSING FLUID LEAK - DIAGNOSIS AND
TESTING, CONVERTER . . . 21-143,21-324,21-495
HOUSING SEAL - INSTALLATION,
ADAPTER...............21-127,21-539,21-83
HOUSING SEAL - INSTALLATION,
EXTENSION.......21-127,21-200,21-380,21-83
HOUSING SEAL - REMOVAL, ADAPTER . . 21-127,
21-539,21-83
HOUSING SEAL - REMOVAL,
EXTENSION.......21-127,21-200,21-380,21-83
HOUSING SEAL AND DUST BOOT -
INSTALLATION, EXTENSION.....21-652,21-716
HOUSING SEAL AND DUST BOOT -
REMOVAL, EXTENSION.........21-652,21-716
HOW TO USE WIRING DIAGRAMS -
DESCRIPTION.....................8W-01-1
H-SECTION REPLACEMENT - STANDARD
PROCEDURE, REAR FRAME............13-15
HUB / BEARING - INSTALLATION.........2-31
HUB / BEARING - REMOVAL.............2-30
HVAC HOUSING - ASSEMBLY...........24-28
HVAC HOUSING - DISASSEMBLY........24-28
HVAC HOUSING - INSTALLATION........24-29
HVAC HOUSING - REMOVAL............24-27
HYDRAULIC BOOSTER - DIAGNOSIS
AND TESTING........................5-25
HYDRAULIC LASH ADJUSTER -
DIAGNOSIS AND TESTING.........9-124,9-31
HYDRAULIC LIFTERS - CLEANING . . 9-260,9-388
HYDRAULIC LIFTERS - INSTALLATION . . . 9-260,
9-388
HYDRAULIC LIFTERS - REMOVAL . . . 9-259,9-387
HYDRAULIC PRESSURE TEST -
DIAGNOSIS AND TESTING......21-140,21-321,
21-493
HYDRAULIC SCHEMATICS, SCHEMATICS
AND DIAGRAMS........21-175,21-355,21-513
HYDRAULIC TAPPETS - DIAGNOSIS AND
TESTING......................9-258,9-386
HYDROBOOST - INSTALLATION..........5-22
HYDROBOOST - INSTALLATION, ALL
EXCEPT.............................5-22
HYDROBOOST - REMOVAL..............5-21
HYDROBOOST - REMOVAL, ALL EXCEPT . . . 5-21
HYDRO-BOOST BRAKE BOOSTER -
INSTALLATION........................5-27
HYDRO-BOOST BRAKE BOOSTER -
REMOVAL...........................5-27
HYDROFORM FENDER RAIL REPAIR -
STANDARD PROCEDURE...............13-12
HYDROSTATIC LOCK - STANDARD
PROCEDURE.........9-186,9-232,9-290,9-361
IDENTIFICATION - DESCRIPTION,
FASTENER.........................Intro.-6
IDENTIFICATION AND INFORMATION -
DESCRIPTION, SECTION.............8W-01-6
IDENTIFICATION NUMBER -
DESCRIPTION, VEHICLE..............Intro.-2
IDLE AIR CONTROL MOTOR -
DESCRIPTION.......................14-33
IDLE AIR CONTROL MOTOR -
INSTALLATION.......................14-35
IDLE AIR CONTROL MOTOR -
OPERATION.........................14-33
IDLE AIR CONTROL MOTOR - REMOVAL . . 14-34
IDLER SHAFT - INSTALLATION......9-175,9-80
IDLER SHAFT - REMOVAL
..........9-175,9-79
IGNITION - SPECIFICATIONS, TORQUE
.....8I-3
IGNITION CIRCUIT SENSE -
DESCRIPTION
.......................8E-10
IGNITION CIRCUIT SENSE - OPERATION
. . 8E-12
IGNITION COIL - DESCRIPTION
..........8I-19IGNITION COIL - INSTALLATION.........8I-24
IGNITION COIL - OPERATION............8I-20
IGNITION COIL - REMOVAL.............8I-23
IGNITION COIL CAPACITOR -
DESCRIPTION........................8I-33
IGNITION COIL CAPACITOR -
INSTALLATION.......................8I-33
IGNITION COIL CAPACITOR - OPERATION . . 8I-33
IGNITION COIL CAPACITOR - REMOVAL . . . 8I-33
IGNITION COIL RESISTANCE, 3.7L V-6.....8I-6
IGNITION COIL RESISTANCE, 4.7L V-8.....8I-6
IGNITION COIL RESISTANCE, 5.7L V-8.....8I-6
IGNITION COIL RESISTANCE, 5.9L.........8I-6
IGNITION COIL RESISTANCE, 8.0L V-10
ENGINE..............................8I-6
IGNITION CONTROL - DESCRIPTION.......8I-1
IGNITION SWITCH - DESCRIPTION........19-9
IGNITION SWITCH - DESCRIPTION,
KEY-IN.............................19-11
IGNITION SWITCH - DIAGNOSIS AND
TESTING............................19-9
IGNITION SWITCH - INSTALLATION......19-11
IGNITION SWITCH - OPERATION.........19-9
IGNITION SWITCH - REMOVAL..........19-10
IGNITION SWITCH AND KEY LOCK
CYLINDER - DIAGNOSIS AND TESTING . . . 19-11
IGNITION TIMING, SPECIFICATIONS.......8I-6
IGNITION-OFF DRAW TEST - STANDARD
PROCEDURE..........................8F-11
IMMOBILIZER MODULE - DESCRIPTION,
SENTRY KEY........................8E-13
IMMOBILIZER MODULE - INSTALLATION,
SENTRY KEY........................8E-15
IMMOBILIZER MODULE - OPERATION,
SENTRY KEY........................8E-13
IMMOBILIZER MODULE - REMOVAL,
SENTRY KEY........................8E-15
IMMOBILIZER SYSTEM INDICATOR
LAMP - DESCRIPTION, SENTRY KEY......8Q-5
IMMOBILIZER SYSTEM INDICATOR
LAMP - OPERATION, SENTRY KEY........8Q-5
IMMOBILIZER SYSTEM INITIALIZATION,
STANDARD PROCEDURE - SENTRY
KEY................................8Q-3
IMMOBILIZER SYSTEM (SKIS),
DESCRIPTION - SENTRY KEY............8Q-1
IMMOBILIZER SYSTEM TRANSPONDER
PROGRAMMING, STANDARD
PROCEDURE - SENTRY KEY.............8Q-4
IMPACT AIRBAG CONTROL MODULE -
DESCRIPTION, SIDE..................8O-53
IMPACT AIRBAG CONTROL MODULE -
OPERATION, SIDE....................8O-54
INCORRECT FLUID LEVEL - DIAGNOSIS
AND TESTING, EFFECTS OF.....21-201,21-381,
21-541
INDEPENDENT FRONT SUSPENSION -
DESCRIPTION, GEAR..................19-16
INDEPENDENT FRONT SUSPENSION -
INSTALLATION, GEAR.................19-17
INDEPENDENT FRONT SUSPENSION -
REMOVAL, GEAR.....................19-16
INDICATOR - DESCRIPTION, ABS........8J-17
INDICATOR - DESCRIPTION, AIRBAG.....8J-18
INDICATOR - DESCRIPTION, BRAKE/
PARK BRAKE........................8J-18
INDICATOR - DESCRIPTION, CARGO
LAMP..............................8J-20
INDICATOR - DESCRIPTION, CHECK
GAUGES............................8J-21
INDICATOR - DESCRIPTION, CRUISE.....8J-22
INDICATOR - DESCRIPTION, DOOR AJAR . . 8J-23
INDICATOR - DESCRIPTION, ETC........8J-24
INDICATOR - DESCRIPTION, GEAR
SELECTOR..........................8J-26
INDICATOR - DESCRIPTION, HIGH BEAM . . 8J-27
INDICATOR - DESCRIPTION, LAMP OUT . . . 8J-28
INDICATOR - DESCRIPTION, LOW FUEL . . . 8J-29
INDICATOR - DESCRIPTION, OVERDRIVE
OFF ...............................8J-33
INDICATOR - DESCRIPTION, SEATBELT
. . . 8J-34
INDICATOR - DESCRIPTION, SECURITY
. . . 8J-34
INDICATOR - DESCRIPTION, SERVICE
4WD
...............................8J-35
INDICATOR - DESCRIPTION, TRANS
TEMP
..............................8J-38
INDICATOR - DESCRIPTION, TURN
SIGNAL
............................8J-39
DRINDEX 17
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