1999 DODGE RAM parking brake

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Page 834 of 1691

DODGE RAM 1999 Service Repair Manual side of instrument panel, near transmission tunnel, and unplug heater
control panel-to-heater assembly vacuum harness connector. Disconnect
vacuum harness from center air duct.
2) On models e

Page 835 of 1691

DODGE RAM 1999 Service Repair Manual vacuum connector. Remove heater control panel. To install, reverse
removal procedure.
HEATER CORE
Removal & Installation
Remove heater assembly from vehicle. See HEATER AS

vacuum connector. Remove heater control panel. To install, reverse
removal procedure.
HEATER CORE
Removal & Installation
Remove heater assembly from vehicle. See HEATER ASSEMBLY.
Disable heater assembly and remove heater core.
INSTRUMENT PANEL
Removal & Installation (Dakota & Durango)
1) Disconnect negative battery cable. Disable air bag system.
See AIR BAG SYSTEM SAFETY article. Place front wheels in straight-
ahead position. Remove sill trim from both doorways. Remove kick panel
covers from both sides of vehicle. Remove mounting bolts for hood
release handle.
2) Remove steering column trim panel and support bracket. If
equipped, remove tilt steering column lever. Remove upper and lower
shrouds from steering column. Remove knee bolster. Unplug driver's
side air bag module. Loosen multifunction switch wiring harness
connector screw and disconnect from switch. Screw will remain in
connector.
3) Disconnect PRNDL cable. Disconnect shift cable from
steering column. Remove steering coupler lock pin. Remove toe plate
retaining bolts. Remove steering column mounting bolts and remove
steering column from vehicle.
4) Remove screw from bulkhead wiring harness connector and
disconnect. Disconnect 2 body wiring harness connectors located next
to bulkhead connector. Disconnect 3 wiring harness connectors located
nearest to dash panel from junction block. Disconnect brake light
switch. If equipped, disconnect Rear Wheel Anti-Lock (RWAL) brake
module, located near steering column support brackets.
5) Disconnect plastic retainer clip from parking brake
linkage rod, located at back of parking brake release handle. Remove
rod end from parking brake handle. Remove instrument panel center
support bracket. Unplug vacuum harness connector located at left end
of heater assembly housing. Disconnect Air Bag Control Module (ACM)
connector.
6) Remove glove box. Reach through glove box opening and
disconnect antenna coaxial cable. Disconnect blower motor connector
located above glove box opening, near support brace for heater
assembly housing. Disconnect radio ground strap. Loosen instrument
panel roll-own bracket bolts about 2 turns (bolts are located at lower
corners, on both sides of instrument panel). Remove 5 bolts across top
of dash panel, at base of windshield, removing center screw last.
7) Roll down instrument panel and install a temporary support
hook that is about 18" (457 mm) in length. Install hook from center
hole in instrument panel to center hole of dash panel. Pull lower
instrument panel outward until both roll-down bracket bolts are in
slotted roll-down position. Instrument panel should now be supported
and away from firewall.
8) Disconnect 2 body wiring harness connectors, located on a
bracket near right end of instrument panel. Disconnect blower motor
resistor. Disconnect temperature control cable from heater assembly
housing and remove from housing. Disconnect defrost duct flexible hose
from heater assembly housing.
9) Ensure all electrical and vacuum connectors are
disconnected and instrument panel is free and clear for removal. With
the aid of an assistant, remove temporary support hook. Lift
instrument panel off of roll-down bracket bolts and remove from
vehicle.
10) To install, reverse removal procedure. Ensure all wiring

Page 836 of 1691

DODGE RAM 1999 Service Repair Manual and hoses are clear and not pinched. Adjusting temperature control
cable. See TEMPERATURE CONTROL CABLE ADJUSTMENT . Tighten bolts and
nuts to specification. See TORQUE SPECIFICATIONS. Enable air bag

and hoses are clear and not pinched. Adjusting temperature control
cable. See TEMPERATURE CONTROL CABLE ADJUSTMENT . Tighten bolts and
nuts to specification. See TORQUE SPECIFICATIONS. Enable air bag
system. See AIR BAG SYSTEM SAFETY article.
Removal & Installation (Ram Pickup)
1) Disconnect negative battery cable. Ensure front wheels are
in a straight-ahead position and steering wheel is in LOCKED position.
Disable air bag system. See AIR BAG SYSTEM SAFETY article. Remove Air
Bag Control Module (ACM) and bracket from floor panel transmission
tunnel. Drain cooling system.
2) Remove left and right cowl side inner trim panels. Remove
knee bolster/steering column cover. Remove hood release and parking
brake release handle bolts from lower instrument panel support.
3) Disconnect driver's side air bag connector at lower left
corner of instrument panel. If equipped, disconnect overdrive lock-out
switch wiring harness connector from instrument panel wire harness
near instrument panel lower reinforcement.
4) Pull PRNDL cable and twist to remove from position arm.
Push tab on bottom of cable retainer upward, then squeeze sides to
remove retainer from column. If equipped, remove tilt lever. Remove
both upper and lower shrouds from column. Remove lower fixed column
shroud. Loosen multifunction switch connector screw. Screw will remain
in connector.
5) Ensure steering wheel is in LOCKED position. Remove
remaining steering column electrical connectors. Remove air bag wiring
harness from steering column wiring trough. Remove wiring trough from
steering column. Remove steering column as an assembly from vehicle.
6) From driver's side of instrument panel, disengage parking
brake release linkage rod from parking brake mechanism. Disconnect
instrument panel wiring harness from parking brake mechanism.
Disconnect 3 wiring harness bulkhead connectors located closest to
dash panel.
7) Disconnect instrument panel left side wiring harness
connectors. Remove screw from center of headlight and dash-to-
instrument panel (bulkhead) connector, and disconnect connector.
Disconnect instrument panel-to-door wiring harness. Disconnect
instrument panel to stoplight switch connector. Disconnect vacuum
harness for heater system.
8) If equipped with an Infinity sound system, disconnect
Infinity wiring harness connector from instrument panel harness
connector that is secured to bulkhead connector.
9) From passenger's side of instrument panel, disconnect
radio antenna coaxial cable connector. Loosen right and left
instrument panel roll-down bracket bolts about .50" (13 mm). Removing
center screw last, remove 5 bolts holding top of instrument panel to
top of dash panel.
10) Roll instrument panel downward and install a temporary
support hook to center hole of dash panel. Support hook should support
instrument panel in rolled-down position, about 18" (457 mm) away from\
dash panel. Disconnect remaining wiring harness connectors. With the
aid of an assistant, remove temporary hook and lift instrument panel
from vehicle.
11) To install, reverse removal procedure. Ensure all wiring
and hoses are clear and not pinched. Tighten bolts and nuts to
specification. See TORQUE SPECIFICATIONS . Enable air bag system. See
AIR BAG SYSTEM SAFETY article.
TEMPERATURE CONTROL CABLE R & I
Removal (Dakota & Durango)
Disconnect negative battery cable. Disconnect but DO NOT
remove instrument panel. See INSTRUMENT PANEL. Disconnect temperature

Page 852 of 1691

DODGE RAM 1999 Service Repair Manual Parking Brake Switch ...................... Analog Instrument Panels
Park Lights ........................................ Exterior Lights
Park/Neutral Position Switch ............................

Parking Brake Switch ...................... Analog Instrument Panels
Park Lights ........................................ Exterior Lights
Park/Neutral Position Switch .............................. Starters
Engine Performance
Anti-Theft System
Body Control Module
Perimeter Lighting Control Relay ................... Exterior Lights
Power Amplifier ..................................... Power Antennas
Power Antenna Module ................................ Power Antennas
Power Antenna Motor ................................. Power Antennas
Power Distribution Center ....................... Power Distribution
Generators & Regulators
Starters
Power Door Lock Motors ............................ Power Door Locks
Power Mirror Motors .................................. Power Mirrors
Memory Systems
Power Sliding Door Controller .............. Power Sliding Side Door
Power Seat Motors ...................................... Power Seats
Memory Systems
Power Steering Pressure Switch .................. Engine Performance
Power Top Motor .............................. Power Convertible Top
Power Top Relay(s) ........................... Power Convertible Top\
Powertrain Control Module ....................... Engine Performance
Analog Instrument Panels
Cruise Control Systems
Data Link Connectors
Generators & Regulators
Starters
Power Window Motors .................................. Power Windows
Power Window Relay(s) ................................ Power Windows\
Radiator Fan Motor(s) ........................ Electric Cooling Fans\
Radiator Fan Relay(s) ........................... Engine Performance\
Electric Cooling Fans
Rainsense Module .............................. Wiper/Washer Systems
Raise Relay .................................. Power Convertible Top
Remote Anti-Theft Personality (RAP) Module ....... Anti-Theft System\
Starters
Warning Systems
Seat Belt Pretensioners ................... Air Bag Restraint System
Seat Belt Retractor Solenoid .................... Passive Restraints
Seat Belt Switch .......................... Air Bag Restraint System
Passive Restraints
Shift Interlock Solenoid ................... Shift Interlock Systems
Shift Lock Actuator ........................ Shift Interlock Systems
Side Marker Lights ................................. Exterior Lights
SIR Coil Assembly (Clockspring) ........... Air Bag Restraint System\
Slip Ring (Clockspring) ................... Air Bag Restraint System\
Steering Column Switches
SRS Control Module ........................ Air Bag Restraint System
Starter Motor ............................................. Starters
Starter Interrupt Relay ................................... Starters
Starter Solenoid .......................................... Starters
Starter Relay ............................................. Starters
Steering Wheel Position Sensor .................... Anti-Lock Brakes
Stoplights ......................................... Exterior Lights
Stoplight Switch ................................ Engine Performance
Cruise Control Systems
Anti-Lock Brakes
Sun Roof ECU ........................................ Power Sun Roof
Sun Roof Motor ...................................... Power Sun Roof
Sun Roof Position Sensor ............................ Power Sun Roof
Taillights ......................................... Exterior Lights
Throttle Position (TP) Sensor ................... Engine Performance\

Page 854 of 1691

DODGE RAM 1999 Service Repair Manual
IN STR UM EN T P A N EL - A N ALO G

1999 D odge P ic ku p R 1500
1999 ACCESSORIES & EQUIPMENT
CHRY - Analog Instrument Panels
Ram Pickup, Ram Van & Ram Wagon

IN STR UM EN T P A N EL - A N ALO G

1999 D odge P ic ku p R 1500
1999 ACCESSORIES & EQUIPMENT
CHRY - Analog Instrument Panels
Ram Pickup, Ram Van & Ram Wagon
DESCRIPTION & OPERATION
INSTRUMENT CLUSTER
All instrument cluster gauges are air core magnetic type.
Tachometer is optional. All gauges use data transferred on Chrysler
Collision Detection (CCD) bus. Instrument cluster incorporates a
Vacuum Fluorescent Display (VFD) for odometer display.
Brake warning light illuminates when ignition is on and
parking brake is applied. Brake warning light also illuminates if
brake hydraulic system failure occurs during service brake
application. Brake warning light bulb test occurs when ignition switch
is in START position.
Oil pressure warning light illuminates when engine oil
pressure is not sufficient to open oil pressure sending unit switch.
Oil pressure warning light bulb test occurs with ignition switch in
RUN position.
All instrument clusters include these analog gauges:
* Coolant Temperature Gauge
* Fuel Gauge
* Oil Pressure Gauge
* Speedometer
* Voltmeter
Instrument clusters include these indicator lights, if
vehicle is equipped with appropriate option:
* Air Bag
* Anti-Lock Brake System (ABS)
* Brake Warning
* Check Gauges
* Cruise On
* Headlight High Beam
* Low Fuel
* Low Washer Fluid
* CHECK ENGINE
* Overdrive Off
* Rear Wheel Anti-Lock (RWAL)
* Seat Belt Reminder
* Security
* Transmission Oil Temperature (A/T)
* Turn Signal
* Upshift (M/T)
* 4WD
SELF-DIAGNOSTIC SYSTEM
WARNING: Vehicle is equipped with an air bag system. To prevent air
bag deployment, disconnect negative battery cable and wait at
least 2 minutes before servicing instrument cluster. See
appropriate AIR BAG RESTRAINT SYSTEMS article.
CAUTION: When battery is disconnected, vehicle computer and memory

Page 855 of 1691

DODGE RAM 1999 Service Repair Manual systems may lose memory data. Driveability problems may exist
until computer systems have completed a relearn cycle. See
COMPUTER RELEARN PROCEDURES article in GENERAL INFOR

systems may lose memory data. Driveability problems may exist
until computer systems have completed a relearn cycle. See
COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION
before disconnecting battery.
NOTE: Testing of instrument panel and gauges requires using a scan
tool to check circuits connected to Body Control Module
(BCM). See appropriate BODY CONTROL COMPUTER TESTS article.
PRELIMINARY DIAGNOSIS
NOTE: There are 2 instrument cluster connectors. These connectors
look identical. Identify connectors by wire color. See WIRING
DIAGRAMS.
Ram Pickup
1) If CCD bus controlled indicator lights and gauges do not
operate, go to step 4). If indicator lights operate and all gauges do
not operate, go to next step.
2) Check for battery voltage between ground and both sides of
fuse No. 14 in junction block. If battery voltage exists on both
sides, go to next step. If battery voltage exists on one side only,
repair short circuit and replace fuse. If battery voltage does not
exist on both sides, locate and repair open circuit. See WIRING
DIAGRAMS.
3) Disconnect negative battery cable. Remove instrument
cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Connect
negative battery cable. Measure voltage between ground and terminal
No. 6 (Yellow wire) of instrument cluster connector C1. See Fig. 1. If
battery voltage is present, reinstall instrument cluster and go to
SELF-DIAGNOSTICS. If battery voltage is not present, repair open
circuit between fuse No. 14 in junction block and instrument cluster
connector C1.
4) Turn ignition on. Measure voltage between ground and both
sides of fuse No. 17 (10-amp) in junction block. If battery voltage
exists on both sides, go to next step. If battery voltage exists on
one side only, repair short circuit and replace fuse. If battery
voltage does not exist on both sides, repair open Dark Blue wire
between ignition switch and junction block.
5) Turn ignition off. Disconnect negative battery cable.
Reconnect instrument cluster. See INSTRUMENT CLUSTER under REMOVAL &
INSTALLATION. Connect negative battery cable. Turn ignition on. Set
parking brake and observe instrument cluster brake warning light. If
brake warning light is off, go to step 7). If brake warning light is
on, go to next step.
6) Turn ignition off. Turn parking lights on and adjust
instrument panel lights dimmer rheostat to full bright position. If
instrument panel lights are on, go to step 8). If instrument panel
lights are off, repair open ground circuit to instrument cluster
connector C1 terminal No. 4 (Black/Light Green wire) or No. 5
(Black/Orange wire). See WIRING DIAGRAMS.
7) Turn ignition off and disconnect negative battery cable.
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL &
INSTALLATION. Connect negative battery cable. Turn ignition on.
Measure voltage between ground and instrument cluster connector C1
terminal No. 2 (Dark Blue/White wire). If battery voltage exists, go
to SELF-DIAGNOSTICS. If battery voltage does not exist, repair open
Dark Blue/White wire.
8) Turn ignition off. Disconnect negative battery cable.
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL &
INSTALLATION. Using an ohmmeter, check continuity between ground and
instrument cluster connector C1 terminals No. 4 (Black/Light Green
wire) and No. 5 (Black/Orange wire). If continuity exists, go to SELF\
-

Page 857 of 1691

DODGE RAM 1999 Service Repair Manual cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
Reconnect negative battery cable. Measure voltage between ground and
terminal No. 6 (Pink/White wire) of instrument cluster connector C1.

cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION.
Reconnect negative battery cable. Measure voltage between ground and
terminal No. 6 (Pink/White wire) of instrument cluster connector C1.
See Fig. 1 . If battery voltage is present, reinstall instrument
cluster and go to SELF- DIAGNOSTICS. If battery voltage is not
present, repair open circuit between fuse No. 12 (15-amp) in junction
block and instrument cluster connector C1 and go to next step.
5) Remove and inspect fuse No. 11 (10-amp) in junction block\
.
If fuse is okay, go to next step. If fuse is blown, locate and repair
cause of blown fuse. Install new fuse and recheck system operation.
6) Turn ignition on. Measure voltage between ground and power
side (Dark Blue/White wire) of fuse No. 11 (10-amp) in junction bloc\
k.
If battery voltage is present, go to step 8). If battery voltage is
not present, locate and repair open circuit to fuse No. 11. See WIRING
DIAGRAMS.
7) Turn ignition off and disconnect negative battery cable.
Install instrument cluster. Connect negative battery cable. Turn
ignition on. Set parking brake and observe instrument cluster brake
warning light. If brake warning light is on, go to next step. If brake
warning light is off, go to step 9).
8) Turn ignition off. Turn parking lights on and adjust
instrument panel lights dimmer rheostat to full bright position. If
instrument panel lights are on, go to step 10). If instrument panel
lights are off, repair instrument cluster illumination ground circuit
between instrument cluster connector C2 terminal No. 7 (Black wire)
and ground. See WIRING DIAGRAMS.
9) Turn ignition off and disconnect negative battery cable.
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL &
INSTALLATION. Connect negative battery cable. Turn ignition on.
Measure voltage between ground and terminal No. 2 (Dark Blue/White
wire) at instrument cluster connector C1. If battery voltage is
present, go to SELF-DIAGNOSTICS. If battery voltage is not present,
repair open circuit between junction block fuse No. 11 and instrument
cluster.
10) Turn ignition off and disconnect negative battery cable.
Remove instrument cluster. See INSTRUMENT CLUSTER under REMOVAL &
INSTALLATION. Check continuity between ground and terminal No. 4
(Black/Dark Green wire) at instrument cluster connector C1. If
continuity exists, go to SELF-DIAGNOSTICS. If continuity does not
exist, locate and repair open in ground circuit.
SELF-DIAGNOSTICS
1) With ignition off, press and hold trip odometer RESET
button while turning ignition switch to ON position. Continue to hold
RESET button until odometer window displays CHEC (about 10 seconds).
Release RESET button. If problem exists, system will display
Diagnostic Trouble Codes (DTC). See DIAGNOSTIC CODE CHART table. For
repairs of DTCs, see appropriate BODY CONTROL COMPUTER TESTS article.
DIAGNOSTIC TROUBLE (DTC) CODE CHART
\
\
\
\
\
\
\

DTC Description Correction

\b\
\
\
\
\b\
\
\

110 Cluster CPU, RAM Or EEPROM Fault Replace Cluster

\b\
\
\
\
\b\
\
\

900 CCD Bus Inoperative Check CCD Bus Connections At

Cluster; Check Cluster

Fuses; Check CCD Bus Bias;

Check CCD Bus Voltage;

Check CCD Bus Terminations

\b\
\
\
\
\b\
\
\

920 Not Receiving VSS Message From PCM Check PCM Software Level;

Page 858 of 1691

$DODGE RAM 1999 Service Repair Manual Use Scan Tool To Verify VSS Signal Is Sent By PCM \b\ \$

Use Scan Tool To Verify VSS

Signal Is Sent By PCM

\b\
\
\
\
\b\
\
\

921 Not Receiving Distance Pulse Check PCM Software Level;

Message From PCM Use Scan Tool To Verify

Distance Pulse Message Is

Sent By PCM

\b\
\
\
\
\b\
\
\

940 Not Receiving Air Bag Light On Check CCD Bus Connections At

Message From Air Bag Module ACM; Check ACM Fuse

\b\
\
\
\
\b\
\
\

950 Not Receiving ABS Light On Message Check CCD Bus Connections

From Anti-lock Brake Control ModuleAt Anti-Lock Control Module;

Check Anti-Lock Control

Module Fuse

\b\
\
\
\
\b\
\
\

999 Undefined Error Record Failure Message;

Press RESET Button To

Continue Self-Diagnostic

Test

\
\
\
\
\
\
\
\f
2) If no DTCs appear, cluster will start a walking segment
test. First, all segments will be illuminated, then each segment in
sequence. If any segment does not illuminate, repeat test to confirm
and replace instrument cluster. When walking segment test is complete,
bulb check will start.
3) If any bulb does not light, remove instrument cluster and
check bulb and bulb holder. See INSTRUMENT CLUSTER under REMOVAL &
INSTALLATION. Ensure bulb holder is properly installed in cluster. If
bulb and bulb holder are okay, replace instrument cluster. If LED does
not light, replace instrument cluster. When bulb check is complete,
gauge actuator test will start.
4) Each gauge needle should stop at 3 calibration points,
then return to relaxed position. If any gauge does not perform as
specified, remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. Inspect all connections between printed
circuit board and gauge terminals, repair as necessary. If connections
are okay, replace instrument cluster. Instrument cluster will
automatically exit self-diagnostics when test is complete.

SYSTEM TESTS
NOTE: There are 2 instrument cluster connectors. These connectors
look identical. Identify connector by wire color. See WIRING
DIAGRAMS.
BRAKE WARNING LIGHT INOPERATIVE
1) Ensure parking brake is released. Turn ignition on. If
brake warning light stays on, check and repair hydraulic brake system
as necessary. See appropriate DISC & DRUM article in BRAKES section.
2) If brake warning light does not illuminate when ignition
is on, check fuse No. 17 (10-amp) on Ram Pickup or fuse No. 11 (10-
amp) on Ram Van and Ram Wagon in junction block. Junction block is
located at left end cover of instrument panel. If fuse is okay, go to
next step. If fuse is blown, locate and repair cause of blown fuse.
Install new fuse and recheck system operation.
3) Turn ignition on. Measure voltage between ground and power
side of fuse No. 17 on Ram Pickup or fuse No. 11 on Ram Van and Ram
Wagon. If battery voltage is present, go to next step. If battery
voltage is not present, locate and repair open circuit between to

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