1999 DODGE RAM jump cable

junction block. See WIRING DIAGRAMS.
4) Turn ignition off. Disconnect negative battery cable.
Disconnect parking brake switch connector. Switch is located at base
of parking brake lever. Ensure parking brake lever is released. Check
continuity between ground and parking brake switch terminal. If
continuity does not exist, go to next step. If continuity exists,
adjust or replace parking brake switch.
5) Ensure parking brake switch is still disconnected. Turn
ignition off. Remove instrument cluster. See INSTRUMENT CLUSTER under
REMOVAL & INSTALLATION. Check continuity between ground and park brake
switch connector. If continuity does not exist, go to next step. If
continuity exists, repair short to ground between instrument cluster
and park brake switch.
6) Check continuity between park brake switch connector and
instrument cluster connector C1, terminal No. 3 (White/Pink wire on
Ram Van and Ram Wagon; White/Light Green wire on Ram Pickup). See
Fig. 1. If continuity does not exist, repair open circuit. See WIRING
DIAGRAMS. If continuity exists, see PRELIMINARY DIAGNOSIS under SELF-
DIAGNOSTIC SYSTEM.
FOUR WHEEL DRIVE (4WD) LIGHT INOPERATIVE (RAM PICKUP)
1) Remove and inspect fuse No. 17 (10-amp) 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.
2) Turn ignition on. Measure voltage between ground and power
side of fuse No. 17. If battery voltage is present, go to next step.
If battery voltage is not present, locate and repair open circuit
between ignition switch and junction block.
3) Turn ignition off. Disconnect negative battery cable.
Disconnect 4WD switch connector. 4WD switch connector is located at
right side of front axle. Check continuity between 4WD switch
connector Black wire and ground. If continuity does not exist, repair
open Black wire between 4WD switch and ground. If continuity exists,
go to next step.
4) Reconnect battery cable. Turn ignition on. Install jumper
wire between 4WD switch connector terminals. 4WD light should
illuminate. If light illuminates, replace 4WD switch. If light does
not illuminate, go to next step.
5) Turn ignition off. Disconnect negative battery cable.
Ensure 4WD switch is still disconnected. Remove instrument cluster.
See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Check continuity
between ground and instrument cluster connector C2 terminal No. 10
(Gray wire). See Fig. 1. If continuity does not exist, go to next
step. If continuity exists, repair short to ground in wire between
instrument cluster and 4WD switch.
6) Check continuity of wire between 4WD switch connector and
terminal No. 10 at instrument cluster connector C2. If continuity does
not exist, repair open wire. If continuity exists, replace bulb.
LOW WASHER FLUID LIGHT INOPERATIVE
1) Remove and inspect 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.
2) Turn ignition on. Measure voltage between ground and power
side of fuse No. 14 (10-amp) on Ram Pickup or fuse No. 11 (10-amp) o\
n
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 ignition switch and junction block.

3) Turn ignition off. Disconnect washer fluid level sensor
connector. Install jumper wire between washer fluid level sensor
connector terminals. Turn ignition on. Low washer fluid level light
should illuminate. Disconnect jumper wire and light should go off. If
light performs as specified, replace washer fluid level sensor. If
light does not perform as specified, go to next step.
4) Turn ignition off. Check continuity between ground and
washer fluid level sensor connector Black wire. If continuity does not
exist, repair open Black wire between washer fluid level sensor and
ground. If continuity exists, go to next step.
5) Ensure washer fluid level sensor is still disconnected.
Turn ignition off. Remove instrument cluster. See INSTRUMENT CLUSTER
under REMOVAL & INSTALLATION. Check continuity between ground and
instrument cluster connector C2 terminal No. 2 (Black/White wire) on
Ram Pickup and terminal No. 9 (Black/Gray wire) on Ram Van and Ram
Wagon. If continuity does not exist, go to next step. If continuity
exists, repair short to ground in White/Black or Black/Gray wire
between instrument cluster and washer fluid level sensor.
6) Check continuity of Black/White wire on Ram Pickup or
Black/Gray wire on Ram Van and Ram Wagon between washer fluid level
sensor connector and instrument cluster connector C2 terminal No. 2 on
Ram Pickup or terminal No. 9 on Ram Van and Ram Wagon. See Fig. 1. If
continuity does not exist, repair open Black/White wire on Ram Pickup
or Black/Gray wire on Ram Van and Ram Wagon. If continuity exists,
replace bulb.
WAIT-TO-START LIGHT INOPERATIVE (RAM PICKUP - DIESEL)
1) Remove and inspect fuse No. 17 (10-amp) 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.
2) Turn ignition on. Measure voltage between ground and power
side of fuse No. 17. If battery voltage is present, go to next step.
If battery voltage is not present, locate and repair open circuit
between Power Distribution Center (PDC) and junction block.
3) Disconnect negative battery cable. Remove instrument
cluster. See INSTRUMENT CLUSTER under REMOVAL & INSTALLATION. Check
for battery voltage between ground and instrument cluster connector C1
terminal No. 2 (Dark Blue/White wire). See Fig. 1. Turn ignition on.
If battery voltage exists, go to next step. If battery voltage does
not exist, repair open Dark Blue/White wire between junction block and
instrument cluster.
4) Turn ignition off. Disconnect Powertrain Control Module
(PCM) White connector C2. PCM is located at firewall in right side of
engine compartment. Connector C2 is center connector. Check continuity
between ground and instrument cluster connector C1 terminal No. 8
(Orange/Black wire). If continuity does not exist, go to next step. If\
continuity exists, repair short to ground in Orange/Black wire between
instrument cluster and ground.
5) Install instrument cluster. Connect battery cable. Install
jumper wire between PCM White connector C2 terminal No. 20
(Orange/Black wire) and ground. See Fig. 2. Turn ignition on. Wait-to-
start light should illuminate. If wait-to-start light illuminates, see
appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE section. If
wait-to-start light does not illuminate, see SELF-DIAGNOSTICS.

PA R ASIT IC L O AD E XPLA N ATIO N & T E ST P R O CED URES

1999 D odge P ic ku p R 1500
GENERAL INFORMATION
Parasitic Load Explanation & Test Procedures
* PLEASE READ THIS FIRST *
This article is provided for general information only. Not
all procedures apply to all makes and models.
GENERAL INFORMATION
The term Parasitic Load refers to electrical devices that
continue to use or draw current after the ignition switch is turned to
OFF position. This small amount of continuous battery draw is
expressed in milliamps (mA). On Ford Motor Co. and General Motors
vehicles produced after 1980, a typical Parasitic Load should be no
more than 50 milliamps (0.050 amps).
Vehicles produced since 1980 have memory devices that draw
current with ignition off for as long as 20 minutes before shutting
down the Parasitic Drain. When Parasitic Load exceeds normal
specifications, the vehicle may exhibit dead battery and no-start
condition.
Follow test procedure for checking Parasitic Loads to
completion. A brief overview of a suggested test procedure is included
along with some typical Parasitic Load specifications. Refer to the
GENERAL MOTORS PARASITIC LOAD TABLE chart.
TESTING FOR PARASITIC LOAD
INTRODUCTION
CAUTION: Always turn ignition off when connecting or disconnecting
battery cables, battery chargers or jumper cables. DO NOT
turn test switch to OFF position (which causes current to run
through ammeter or vehicle electrical system).
NOTE: Memory functions of various accessories must be reset after
the battery is reconnected.
The battery circuit must be opened to connect test switch
(shunt) and ammeter into the circuit. When a battery cable is removed,\
timer circuits within the vehicle computer are interrupted and
immediately begin to discharge. If in doubt about the condition of the
ammeter fuse, test it with an ohmmeter prior to beginning test. An
open fuse will show the same reading (00.00) as no parasitic drain.
Begin test sequence with the meter installed and on the 10-amp scale.
Select lower scale to read parasitic draw.
TEST PROCEDURE USING TEST SWITCH
1) Turn ignition off. Remove negative battery terminal cable.
Install Disconnect Tool (J-38758) test switch male end to negative
battery cable. Turn test switch knob to OFF position (current through
meter). Install negative battery cable to the female end of test
switch.
2) Turn test switch knob to ON position (current through
switch). Road test vehicle with vehicle accessories on (radio, air
conditioner, etc.). After road test, turn ignition switch to LOCKED
position and remove key. Connect ammeter terminals to test switch

2) Connect voltmeter positive lead to negative battery cable
clamp. Connect voltmeter negative lead to negative battery post. Crank
engine and observe voltmeter reading. If voltage is detected, repair
poor contact between cable clamp and post. Perform same procedure to
positive battery post and cable clamp.
Ground Connection Resistance Test
Connect voltmeter negative lead to negative battery post.
Connect voltmeter positive lead to engine block, near negative battery
cable grounding point. Crank engine and observe voltmeter reading. If
voltmeter reading indicates more than 0.2 volt, repair poor ground
connection or replace ground cable.
Starter Ground Connection Resistance Test
Connect voltmeter negative lead to negative battery post.
Connect voltmeter positive lead to starter housing. Crank engine and
observe voltmeter reading. If voltmeter reading indicates more than 0.
2 volt, repair poor starter-to-ground connection.
Positive Battery Cable Resistance Test
1) Remove starter heat shield (if equipped) to gain access t\
o
starter solenoid connections. Connect voltmeter negative lead to
starter solenoid battery terminal and voltmeter positive lead to
positive battery post.
2) Crank engine and observe voltmeter reading. If voltage
reads more than 0.2 volt, correct poor connection between battery
cable and starter solenoid or replace positive battery cable.
SOLENOID CIRCUIT TEST
NOTE: Perform SOLENOID CIRCUIT TEST before testing starter relay
and starter relay circuit. Ensure A/T is in Park position or
M/T is in Neutral position and parking brake is applied.
1) Disable vehicle ignition and fuel systems. See
DISABLING/ENABLING IGNITION & FUEL SYSTEMS.
2) Ensure battery is fully charged. Ensure solenoid
connections are not loose or corroded. Remove starter relay from Power
Distribution Center (PDC). Refer to PDC cover for proper relay
location. PDC is located in engine compartment.
3) Connect a remote starter switch or jumper wire between
starter relay socket terminal No. 87 and positive battery post. See
Fig. 1 or 2. If engine cranks, solenoid and starter are good. Go to
STARTER RELAY TEST.
4) If engine fails to crank, or if solenoid chatters, check
wiring and connectors from starter relay socket to starter solenoid
terminal. Repair any loose or corroded connections. If engine still
fails to crank, remove starter and proceed to SOLENOID TEST under
BENCH TESTING.
STARTER RELAY TEST
NOTE: Perform SOLENOID CIRCUIT TEST before testing starter relay.
Remove starter relay from Power Distribution Center (PDC).
Refer to PDC cover for proper relay location. PDC is located in engine
compartment. Connect 12-volt power source to starter relay terminal
No. 86 and ground terminal No. 85. See Fig. 1 or 2. Using ohmmeter,
check continuity across starter relay terminals No. 30 and 87. If
continuity is not present, replace starter relay.

STARTER RELAY CIRCUIT TEST
NOTE: Perform STARTER RELAY TEST before testing starter relay
circuit.
1) Ensure battery is fully charged. Remove starter relay from
Power Distribution Center (PDC). Refer to PDC cover for proper relay
location. PDC is located in engine compartment.
2) Connect a jumper wire between starter relay socket
terminal No. 30 and terminal No. 87. See Fig. 1 or 2. If engine does
not crank, go to SOLENOID TEST under BENCH TESTING. If engine cranks,
go to next step.
3) Turn ignition on. Check voltage between ground and starter
relay socket terminal No. 30. If battery voltage is not present,
repair open in circuit between starter relay socket and battery. If
battery voltage is present, go to next step.
4) Check voltage between ground and starter relay socket
terminal No. 86 with ignition switch in START position and clutch
pedal depressed (if equipped with M/T). If battery voltage is present,\
circuit is okay. Go to step 6) if equipped with M/T or step 7) if
equipped with A/T. If battery voltage is not present, repair open in
circuit between ignition switch and starter relay socket (A/T) or go
to next step (M/T).
5) Unplug wiring connector from clutch position switch
mounted on clutch pedal bracket. Connect jumper wire between clutch
position switch connector terminals. Recheck for voltage at starter
relay socket terminal No. 86 with ignition switch in START position.
If battery voltage is present, check clutch position switch adjustment
(if applicable). Adjust switch as necessary. If switch adjustment is
okay, check clutch position switch. See CLUTCH POSITION SWITCH TEST.
If battery voltage is not present, repair wiring between ignition
switch and starter relay socket as necessary.
6) On M/T models, connect voltmeter negative lead to starter
relay socket terminal No. 85 and positive lead to terminal No. 86.
Turn ignition switch to START position and depress clutch pedal. If
battery voltage is present, starter relay socket ground circuit is
good. Replace faulty starter relay. If battery voltage is not present,
repair ground wire circuit.
7) On A/T models, connect voltmeter negative lead to starter
relay socket terminal No. 85 and positive lead to terminal No. 86.
Ensure transmission gear selector is in Park or Neutral position.
Ground circuit runs through Park/Neutral Position (PNP) switch or
Transmission Range (TR) sensor on transmission. Turn ignition switch
to START position. If battery voltage is present, starter relay socket
ground circuit is good. Replace faulty starter relay.
8) If battery voltage is not present, check PNP switch or TR
sensor for loose or damaged connections. Also, check ground to PNP
switch or TR sensor. Repair as necessary. If connections and ground
are okay, check PNP switch or TR sensor. See PARK/NEUTRAL POSITION
(PNP) SWITCH & TRANSMISSION RANGE (TR) SENSOR TEST.
PARK/NEUTRAL POSITION (PNP) SWITCH & TRANSMISSION RANGE (TR)
SENSOR TEST
NOTE: Transmission Range (TR) sensor may be also known as
Park/Neutral Position (PNP) switch or Park/Neutral switch.
NOTE: The following test is for Caravan, Ram Van, Ram Wagon and
Voyager with 3-speed transmission. All other models are
equipped with a Transmission Range (TR) sensor. If TR sensor
or sensor circuit is defective, see appropriate NTC test in
appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE
section.

Fig. 3: Fuel Heater Relay Terminals
Courtesy of Chrysler Corp.
Intake Manifold Air Heater Relays
1) Intake manifold air heater relays may also be referred to
as intake air heater relays. Intake manifold air heater relays are
mounted on inner wheelwell, below driver's side battery. See Fig. 4.
2) Disconnect negative battery cables. Note location of
wiring on intake manifold air heater relays for reassembly reference.
Disconnect all electrical connectors and cables from intake manifold
air heater relays.
3) Connect ohmmeter between large terminals on intake
manifold air heater relay to check for continuity. Using jumper wires,
momentarily apply battery voltage to relay trigger wire terminals
(small wire terminals) at base of intake manifold air heater relay.
See Fig. 4 . Polarity is not important.
4) Intake manifold air heater relay should click and ohmmeter
should indicate continuity between large terminals when battery
voltage is applied to relay trigger wire terminals. If intake manifold
air heater relay operation is not as specified, replace intake
manifold air heater relay with bracket. Test remaining intake manifold
air heater relay. Remove ohmmeter. Reconnect all electrical connectors
and negative battery cables.
NOTE: For additional information on checking wiring circuit for
intake manifold air heater relay, see DTC P0380: INTAKE AIR
HEATER RELAY NO. 1 CONTROL CIRCUIT and DTC P0382: INTAKE AIR
HEATER RELAY NO. 2 CONTROL CIRCUIT tests in SELF-DIAGNOSTICS
- JEEP, TRUCKS & RWD VANS article.

VEH IC LE C O M MUNIC ATIO N

1999 D odge P ic ku p R 1500
1999 ACCESSORIES & EQUIPMENT
CHRY - Vehicle Communications
Ram Pickup
IDENTIFYING VEHICLE COMMUNICATION PROBLEMS
Connect scan tool to Data Link Connector (DLC) to retrieve
messages. If scan tool message is blank, disconnect scan tool. Ensure
ground circuit has continuity at DLC terminal No. 4. Ensure 12 volts
exists at DLC terminal No. 16. Check power to DLC terminal No. 16 from
Power Distribution Center (PDC) fuse No. 12. Try another scan tool
and/or cable. If scan tool DTC or fault message is present, see
following bus fault messages list and proceed to appropriate DTC or
fault message:
* BUS (+) & BUS (-) OPEN
* BUS (+) OPEN
* BUS (-) OPEN
* BUS (+) & BUS (-) SHORTED TOGETHER
* BUS BIAS LEVEL TOO HIGH
* BUS BIAS LEVEL TOO LOW
* NO BUS BIAS
* NO RESPONSE AIR BAG CONTROL MODULE
* NO RESPONSE CENTRAL TIMER MODULE
* NO RESPONSE INSTRUMENT CLUSTER
* NO RESPONSE POWERTRAIN CONTROL MODULE
* NO RESPONSE COMPASS/MINI-TRIP SYSTEM
* NO RESPONSE RADIO
* NO TERMINATION
* NOT RECEIVING BUS MESSAGES CORRECTLY
* BUS SHORT TO 5 VOLTS
* BUS SHORT TO BATTERY
* BUS SHORT TO GROUND
BUS (+) & BUS (-) OPEN, (BUS (+) OPEN OR BUS (-) OPEN)
NOTE: For connector terminal identification and wiring diagrams,
see BODY CONTROL COMPUTER - INTRODUCTION article. Perform
VERIFICATION TEST VER-1 after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module
connector.
1) Disconnect scan tool. Ensure ignition is on. Using an
external voltmeter, measure voltage between ground and DLC terminal
No. 3 (Violet/Brown wire). If voltage is not 1.8-2.3 volts, go to step\
3). If voltage is 1.8-2.3 volts, go to next step.
2) Measure voltage between ground and DLC terminal No. 11
(White/Black wire). If voltage is not 1.8-2.3 volts, go to next step.
If voltage is 1.8-2.3 volts, replace scan tool cable or scan tool.
3) Connect jumper wire between ground and DLC connector
terminal No. 11 (White/Black wire). Turn ignition off. Remove
instrument cluster. Using external ohmmeter, measure resistance
between ground and instrument cluster connector C1 terminal No. 9
(White/Black wire). If resistance is less than 5 ohms, go to next
step. If resistance is 5 ohms or more, repair open White/Black wire.
4) Disconnect jumper wire. Connect jumper wire between ground
and DLC connector terminal No. 3 (White/Black wire). Measure

voltage between ground and DLC connector terminal No. 3 (Violet/Brown
wire). If voltage is not 1.8-2.8 volts, go to step 9). If voltage is
1.8-2.8 volts, go to next step.
2) Measure voltage between ground and DLC connector terminal
No. 11 (White/Black wire). If voltage is not 1.8-2.8 volts, go to next\
step. If voltage is 1.8-2.8 volts, replace scan tool cable or scan
tool.
3) Turn ignition off. Disconnect instrument cluster. Ensure
interior lights are off. Using external ohmmeter, measure resistance
between ground and instrument cluster connector C1 terminal No. 10
(Violet/Brown wire). If resistance is less than 1000 ohms, repair
Violet/Brown wire for short to ground. If resistance is 1000 ohms or
more, go to next step.
4) Measure resistance between ground and instrument cluster
connector C1 terminal No. 9 (White/Black wire). If resistance is less
than 1000 ohms, repair White/Black wire for short to ground. If
resistance is 1000 ohms or more, go to next step.
5) Connect jumper wire between ground and DLC connector
terminal No. 3 (White/Black wire). Measure resistance between ground
and instrument cluster connector C1 terminal No. 10 (Violet/Brown
wire). If resistance is less than 5 ohms, go to next step. If
resistance is 5 ohms or more, repair open Violet/Brown wire.
6) Disconnect jumper wire. Connect jumper wire between ground
and DLC connector terminal No. 11 (White/Black wire). Measure
resistance between ground and instrument cluster connector C1 terminal
No. 9 (White/Black wire). If resistance is less than 5 ohms, go to
next step. If resistance is 5 ohms or more, repair open White/Black
wire.
7) Disconnect jumper wire. Measure resistance between ground
and instrument cluster connector C1 terminal No. 4 (Black/Light Green
wire). If resistance is 5 ohms or less, repair open Black/Light Green
wire. If resistance is more than 5 ohms, go to next step.
8) Measure resistance between ground and instrument cluster
connector C1 terminal No. 5 (Black wire). If resistance is 5 ohms or
less, repair open Black wire. If resistance is more than 5 ohms,
replace instrument cluster.
9) Turn ignition off. Disconnect instrument cluster. Ensure
interior lights are off. Measure resistance between ground and
instrument cluster connector C1 terminal No. 4 (Black/Light Green
wire). If resistance is 5 ohms or less, repair open Black/Light Green
wire. If resistance is more than 5 ohms, go to next step.
10) Measure resistance between ground and instrument cluster
connector C1 terminal No. 5 (Black wire). If resistance is 5 ohms or
less, repair open Black wire. If resistance is more than 5 ohms,
replace instrument cluster.
11) Connect jumper wire between ground and DLC connector
terminal No. 11 (White/Black wire). Measure resistance between ground
and instrument cluster connector C1 terminal No. 9 (White/Black wire).\
If resistance is less than 5 ohms, go to next step. If resistance is 5
ohms or more, repair open White/Black wire.
12) Disconnect jumper wire. Measure resistance between ground
and instrument cluster connector C1 terminal No. 9 (White/Black wire).\
If resistance is less than 1000 ohms, repair White/Black wire for
short to ground. If resistance is 1000 ohms or more, go to next step.
13) Connect jumper wire between ground and DLC connector
terminal No. 3 (White/Black wire). Measure resistance between ground
and instrument cluster connector C1 terminal No. 10 (Violet/Brown
wire). If resistance is less than 5 ohms, go to next step. If
resistance is 5 ohms or more, repair open Violet/Brown wire.
14) Using external ohmmeter, measure resistance between
ground and instrument cluster connector C1 terminal No. 10
(Violet/Brown wire). If resistance is less than 1000 ohms, repair
Violet/Brown wire for short to ground. If resistance is 1000 ohms or