1999 DODGE RAM turn signal

gearbox reset gas type charging reset sun roof traction control

Page 394 of 1691

DODGE RAM 1999 Service Repair Manual voltage. If voltage is less than one volt, go to next step. If voltage
is one volt or more, condition to set FTC is not present at this time.
Test is complete.
2) While observing scan tool, d

voltage. If voltage is less than one volt, go to next step. If voltage
is one volt or more, condition to set FTC is not present at this time.
Test is complete.
2) While observing scan tool, disconnect S/C ON/OFF switch.
If S/C switch voltage changes to 5 volts, replace S/C ON/OFF switch.
Perform TEST VER-4A under VERIFICATION TESTS. If voltage does not
change to 5 volts, go to next step.
3) While observing scan tool, disconnect S/C RESUME/ACCEL
switch. If S/C switch voltage changes to 5 volts, replace S/C
RESUME/ACCEL switch. Perform TEST VER-4A under VERIFICATION TESTS. If
voltage does not change to 5 volts, go to next step.
4) Turn ignition off. Ensure both S/C switches are still
disconnected. Using an ohmmeter, check resistance between S/C switch
connector terminals (S/C switch signal circuit and S/C switch ground
circuit). If resistance is less than 5 ohms, repair short circuit.
Perform TEST VER- 4A under VERIFICATION TESTS. If resistance is 5 ohms
or more, go to next step.
5) Disconnect clockspring 4-pin connector. Clockspring 4-pin
connector is located behind steering wheel. Inspect connector. Clean
or repair as necessary. Using an ohmmeter, check resistance between
ground and S/C switch signal circuit at clockspring connector (Dark
Green/Red wire on all models except Ram Van and Ram Wagon; wire color
is not available for Ram Van and Ram Wagon). If resistance is less
than 5 ohms, repair short to ground. Perform TEST VER-4A under
VERIFICATION TESTS. If resistance is 5 ohms or more, go to next step.
6) Disconnect PCM. Inspect connectors. Clean or repair as
necessary. Using an ohmmeter, check resistance between ground and S/C
switch signal circuit at either S/C switch connector (Dark Green/Red
wire on all models except Ram Van and Ram Wagon; wire color is not
available for Ram Van and Ram Wagon). If resistance is less than 5
ohms, repair short to ground. Perform TEST VER-4A under VERIFICATION
TESTS. If resistance is 5 ohms or more, replace PCM. Perform TEST VER-
4A under VERIFICATION TESTS.
FTC P1683: SPEED CONTROL POWER RELAY CIRCUIT
FTC P1683 will set if Speed Control (S/C) power supply
circuit is open or shorted when S/C is turned on.
Possible Causes:
* Brake switch out of adjustment.
* S/C brake switch output circuit open or shorted.
* Defective S/C servo.
* Defective brake switch.
* S/C vacuum or vent solenoid control circuits open or
shorted.
* Defective PCM.
* Ground circuit open.
* S/C power supply circuit open.
NOTE: For component locations, see COMPONENT LOCATIONS. For
connector terminal identification, see CONNECTOR
IDENTIFICATION. For wiring diagram, see WIRING DIAGRAMS.
NOTE: Ensure brake pedal is not depressed during the following
steps.
1) Turn ignition off. Disconnect S/C servo connector. Inspect
connector. Clean or repair as necessary. Turn ignition on. Using scan
tool, actuate S/C relay. Using a 12-volt test light, probe S/C brake
switch output circuit at S/C servo connector terminal No. 3 (Dark
Blue/Red wire). If test light is illuminated and bright, go to next

Page 398 of 1691

DODGE RAM 1999 Service Repair Manual 1) Turn ignition off. Disconnect brake switch connector.
Inspect connector. Clean or repair as necessary. Turn ignition on.
Using a voltmeter, measure voltage of brake switch sense circuit at

1) Turn ignition off. Disconnect brake switch connector.
Inspect connector. Clean or repair as necessary. Turn ignition on.
Using a voltmeter, measure voltage of brake switch sense circuit at
brake switch White/Pink wire. If voltage is more than 10 volts, go to
next step. If voltage is 10 volts or less, go to step 3).
2) Connect a jumper wire between ground and brake switch
connector White/Pink wire. Using scan tool, read brake switch input
status. If scan tool displays brake switch released, replace brake
switch. Perform TEST VER-4A under VERIFICATION TESTS. If scan tool
does not display brake switch released, repair open ground circuit.
Perform TEST VER-4A under VERIFICATION TESTS.
3) Disconnect PCM connectors. Inspect connectors. Clean or
repair as necessary. Using an ohmmeter, measure resistance between
ground and brake switch sense circuit at PCM connector C3, terminal
No. 24 (White/Pink wire). If resistance less than 5 ohms, repair short\
to ground. Perform TEST VER-4A under VERIFICATION TESTS. If resistance
is 5 ohms or more, go to next step.
4) Using an ohmmeter, measure resistance of brake switch
sense circuit between PCM connector C3, terminal No. 24 and brake
switch White/Pink wire. If resistance is 5 ohms or more, repair open
brake switch sense circuit. Perform TEST VER-4A under VERIFICATION
TESTS. If resistance is less than 5 ohms, replace PCM. Perform TEST
VER-4A under VERIFICATION TESTS.
NTC-2: CHECKING FOR SPEED CONTROL DENIED MESSAGE
At this time speed control switch and servo functions appear
to operate properly. Using scan tool, monitor speed control output
status. Road test vehicle at speeds more than 30 MPH. Attempt to set
speed control. See SCAN TOOL DENIED STATUS table. Items listed in
table will not allow speed control to set. The last or most recent
cause for speed control not to set is indicated by denied status.
Correct fault and recheck system operation.
SCAN TOOL DENIED STATUS
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Denied Message Reason

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ON/OFF PCM Does Not See An ON Signal From Switch

At PCM Terminal No. 41

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SPEED Vehicle Speed As Seen By PCM Terminal

No. 66 Is Not Greater Than 36 MPH

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RPM Engine RPM Is Excessively High

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BRAKE Brake Switch Sense Circuit Is Open

Indicating That Brakes Are Applied

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P/N Park/Neutral Switch Sense Circuit Is Grounded

Indicating That Transmission Is In Park Or Neutral

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RPM/SPD PCM Senses Excessive Engine RPM

For A Given Vehicle Speed

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SOL FLT PCM Senses A Servo Solenoid Circuit

Trouble Code That Is Maturing Or Set In Memory

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NTC-3: SPEED CONTROL ON/OFF SWITCH
Possible Causes:

Page 399 of 1691

DODGE RAM 1999 Service Repair Manual * Signal circuit open or shorted.
* S/C ON/OFF switch defective.
* S/C RESUME/ACCEL switch defective.
* Defective PCM.
* Defective clockspring.
1) Turn

* Signal circuit open or shorted.
* S/C ON/OFF switch defective.
* S/C RESUME/ACCEL switch defective.
* Defective PCM.
* Defective clockspring.
1) Turn ignition on. Using scan tool, read S/C switch
voltage. If voltage is more than 4 volts, go to next step. If voltage
is 4 volts or less, go to step 4).
2) Turn ignition off. Disconnect S/C ON/OFF switch. Inspect
connector. Clean or repair as necessary. Connect a jumper wire between
ground and S/C switch signal circuit at S/C ON/OFF switch connector
(Dark Green/Red wire on all models except Ram Van and Ram Wagon; wire
color is not available for Ram Van and Ram Wagon). Turn ignition on.
Using scan tool, read S/C switch voltage. If voltage is less than one
volt, replace S/C ON/OFF switch. Perform TEST VER-4A under
VERIFICATION TESTS. If voltage is one volt or more, go to next step.
3) Using a voltmeter, measure voltage on S/C switch signal
circuit. If voltage is less than 4 volts, repair high resistance in
S/C switch signal circuit. Perform TEST VER-4A under VERIFICATION
TESTS. If voltage is more than 6 volts, repair short to voltage.
Perform TEST VER-4A under VERIFICATION TESTS. If voltage is 4-6 volts,
replace PCM. Perform TEST VER-4A under VERIFICATION TESTS.
4) Turn ignition off. Disconnect S/C ON/OFF switch.
Disconnect PCM. Inspect connectors. Clean or repair as necessary.
Using an ohmmeter, measure resistance between ground and S/C switch
signal circuit at PCM connector C3, terminal No. 32 (White/Light Green
wire on Ram Van & Ram Wagon; Red/Light Green wire on all other
models). If resistance is less than 5 ohms, repair short to ground.
Perform TEST VER-4A under VERIFICATION TESTS. If resistance is 5 ohms
or more, go to next step.
5) Reconnect PCM. Ensure S/C ON/OFF switch is still
disconnected. Turn ignition on. Using scan tool, read S/C switch
voltage. If voltage is more than 4 volts, replace ON/OFF switch.
Perform TEST VER-4A under VERIFICATION TESTS. If voltage is 4 volts or
less, go to next step.
6) Disconnect RESUME/ACCEL switch. Using scan tool, read S/C
switch voltage. If voltage is more than 4 volts, replace RESUME/ACCEL
switch. Perform TEST VER-4A under VERIFICATION TESTS. If voltage is 4
volts or less, go to next step.
7) Disconnect clockspring connector located behind lower
steering column shroud. Inspect connector. Clean or repair as
necessary. Using scan tool, read S/C switch voltage. If voltage is
more than 4 volts, replace clockspring. See AIR BAG RESTRAINT SYSTEMS
- TRUCKS article. Perform TEST VER-4A under VERIFICATION TESTS. If
voltage is 4 volts or less, test is complete.
NTC-4: SPEED CONTROL RESUME/ACCEL SWITCH
Possible Causes:
* Ground circuit open.
* RESUME/ACCEL switch defective.
* Signal circuit open.
1) Turn ignition off. Disconnect RESUME/ACCEL switch. Inspect
connectors. Clean or repair as necessary. Connect a jumper wire
between ground and S/C switch signal circuit at RESUME/ACCEL switch
connector (Dark Green/Red wire on all models except Ram Van and Ram
Wagon; wire color is not available for Ram Van and Ram Wagon). Turn
ignition on. Using scan tool, read S/C switch voltage. If voltage is
less than one volt, replace RESUME/ACCEL switch. Perform TEST VER-4A

Page 400 of 1691

DODGE RAM 1999 Service Repair Manual under VERIFICATION TESTS. If voltage is one volt or more, go to next
step.
2) Turn ignition off. Using an ohmmeter, check resistance of
RESUME/ACCEL switch ground circuit at RESUME/ACCEL swit

under VERIFICATION TESTS. If voltage is one volt or more, go to next
step.
2) Turn ignition off. Using an ohmmeter, check resistance of
RESUME/ACCEL switch ground circuit at RESUME/ACCEL switch connector.
If resistance is 5 ohms or more, repair open ground circuit. Perform
TEST VER-4A under VERIFICATION TESTS. If resistance is less than 5
ohms, repair open S/C switch signal circuit. Perform TEST VER-4A under
VERIFICATION TESTS.
VERIFICATION TESTS
TEST VER-4A
NOTE: If PCM has been replaced and correct VIN and mileage have not
been programmed, a FTC will be set in ABS and air bag
modules. If vehicle is equipped with a Sentry Key Immobilizer
Module (SKIM), sentry key data must be updated to enable
starting. See COMPUTER RELEARN PROCEDURES article in GENERAL
INFORMATION.
1) If vehicle is not equipped with a diesel engine, go to
next step. If vehicle is equipped with a diesel engine, and PCM has
been disconnected or replaced, battery has been disconnected, or
Accelerator Pedal Position Sensor (APPS) has been disconnected or
replaced, APPS calibration must be programmed into PCM (diesel only).
Turn ignition on. Slowly press accelerator pedal to floor and slowly
release. DO NOT attempt to adjust screws or disassemble APPS. Go to
next step.
2) On all engines, if vehicle is equipped with ABS or air
bag, enter correct VIN and mileage in PCM. Erase DTCs in ABS and air
bag modules. Inspect vehicle to ensure all engine and speed control
system components are connected. Reassemble and reconnect components
as necessary. Using scan tool, erase DTCs from PCM.
3) Road test vehicle at a speed greater than 35 MPH. Turn S/C
switch on. Press and release SET button. If S/C does not engage,
repair is not complete. Check for related TSBs and return to TROUBLE
SHOOTING, if necessary. If speed control engages, go to next step
4) Quickly depress and release RESUME/ACCEL switch. If
vehicle speed increases by 2 MPH, go to next step. If vehicle speed
does not increase by 2 MPH, repair is not complete. Check for related
TSBs and return to TROUBLE SHOOTING, if necessary.
5) Press and hold COAST switch. Vehicle speed should
decrease. If vehicle speed decreases, go to next step. If vehicle
speed does not decrease, repair is not complete. Check for related
TSBs and return to TROUBLE SHOOTING, if necessary.
6) Using caution, depress and release brake pedal. If S/C
disengages, go to next step. If S/C does not disengage, repair is not
complete. Check for related TSBs and return to TROUBLE SHOOTING, if
necessary.
7) Bring vehicle speed to 35 MPH. Depress speed control
RESUME/ACCEL switch. If vehicle resumes to previously set speed, go to
next step. If vehicle does not resume to previously set speed, repair
is not complete. Check for related TSBs and return to TROUBLE
SHOOTING, if necessary.
8) Hold down SET switch. Vehicle speed should decrease. If
vehicle speed decreases, go to next step. If vehicle speed did not
decrease, repair is not complete. Check for related TSBs and return to
TROUBLE SHOOTING, if necessary.
9) Ensure vehicle speed is more than 35 MPH and release SET
switch. If vehicle sets a new speed, go to next step. If vehicle did
not set a new speed, repair is not complete. Check for related TSBs
and return to TROUBLE SHOOTING, if necessary.

Page 853 of 1691

DODGE RAM 1999 Service Repair Manual Torque Converter Clutch Solenoid/Switch ......... Engine Performance
Traction Control Switch ........................... Anti-Lock Brakes
Trailer Tow Connector .............................. Ext

Torque Converter Clutch Solenoid/Switch ......... Engine Performance
Traction Control Switch ........................... Anti-Lock Brakes
Trailer Tow Connector .............................. Exterior Lights
Trailer Tow Relay .................................. Exterior Lights
Transmission/Transaxle .......................... Engine Performance
Transmission Control Module (TCM) ............... Engine Performance\
Starters
Transmission Range Sensor ................................. Starters
Back-Up Lights
Engine Performance
Transmission Range Switch ........................... Back-Up Lights
Engine Performance
Anti-Theft System
Turn Signal Flasher ................................ Exterior Lights
Turn Signal Lights ................................. Exterior Lights
Twilight Sentinel Switch ......................... Headlight Systems
Daytime Running Lights
Vapor Canister Leak Detection Pump .............. Engine Performance
Vehicle Control Module (VCM) .................... Engine Performance\
Vehicle Dynamic Module ....................... Electronic Suspension
Vehicle Speed Control Servo ................. Cruise Control Systems
Vehicle Speed Sensor .......................... Data Link Connectors
Analog Instrument Panels
Cruise Control Systems
Electronic Suspension
Voltage Regulator .......................... Generators & Regulators
Water-In-Fuel Sensor ............................ Engine Performance
Analog Instrument Panels
Wheel Speed Sensors ............................... Anti-Lock Brakes
Window Timer Module .......................... Power Convertible Top
Windshield Intermittent Wiper Relay ........... Wiper/Washer Systems
Windshield Washer Motor ....................... Wiper/Washer Systems
Wiper Motor ................................... Wiper/Washer Systems
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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 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

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921 Not Receiving Distance Pulse Check PCM Software Level;

Message From PCM Use Scan Tool To Verify

Distance Pulse Message Is

Sent By PCM

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

Message From Air Bag Module ACM; Check ACM Fuse

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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

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999 Undefined Error Record Failure Message;

Press RESET Button To

Continue Self-Diagnostic

Test

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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

Page 898 of 1691

DODGE RAM 1999 Service Repair Manual F1 - Not Used
F2 - 30 Amp (Lt. Green)
Blower Motor
CB1 - 30 Amp (Circuit Breaker)
Power Windows
CB2 - 30 Amp (Circuit Breaker)
Power Seats
1 - 20 Amp (Yellow)

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