1999 DODGE RAM wiring

(White/Black wire). Perform CCD BUS test. If scan tool does not
display BUS SHORT TO GROUND, repair open White/Black wire. If scan
tool displays BUS SHORT TO GROUND, replace PCM.
NOT RECEIVING BUS MESSAGES CORRECTLY
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 anti-lock brake controller module. Controller
module is mounted to top of ABS hydraulic unit. Turn ignition on. If
scan tool displays BUS OPERATIONAL, replace anti-lock brake controller
module. If scan tool does not display BUS OPERATIONAL, go to next
step.
2) Turn ignition off and wait 2 minutes. Disconnect Air Bag
Control Module (ACM). ACM is located under center of instrument panel.\
Turn ignition on. If scan tool displays BUS OPERATIONAL, replace ACM.
If scan tool does not display BUS OPERATIONAL, go to next step.
3) Disconnect Central Timer Module (CTM). CTM is located
under left side of instrument panel. Turn ignition on. If scan tool
displays BUS OPERATIONAL, replace CTM. If scan tool does not display
BUS OPERATIONAL, replace scan tool cable or scan tool.
BUS SHORT TO 5 VOLTS
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) Turn ignition off. Disconnect Powertrain Control Module
(PCM). PCM is mounted in right side of firewall. Turn ignition on. If
scan tool does not display BUS SHORT TO 5 VOLTS, go to step 10). If
scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
2) Turn ignition off. Disconnect anti-lock brake controller
module. Controller module is mounted to top of ABS hydraulic unit.
Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS,
replace anti-lock brake controller module. If scan tool displays BUS
SHORT TO 5 VOLTS, go to next step.
3) Turn ignition off. Disconnect instrument cluster. Turn
ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS,
replace instrument cluster circuit board. If scan tool displays BUS
SHORT TO 5 VOLTS, go to next step.
4) Turn ignition off. Disconnect compass mini-trip computer.
Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS,
replace compass mini-trip computer. If scan tool displays BUS SHORT TO
5 VOLTS, go to next step.
5) Turn ignition off. Disconnect CCD radio. Turn ignition on.
If scan tool does not display BUS SHORT TO 5 VOLTS, replace radio. If
scan tool displays BUS SHORT TO 5 VOLTS, go to next step.
6) Turn ignition off and wait 2 minutes. Disconnect Air Bag
Control Module (ACM). ACM is located under center of instrument panel.\
Turn ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS,
replace ACM. If scan tool displays BUS SHORT TO 5 VOLTS, go to next
step.
7) Turn ignition off. Disconnect Central Timer Module (CTM).\
CTM is mounted behind right corner of dash, beside glove box. Turn

ignition on. If scan tool does not display BUS SHORT TO 5 VOLTS,
replace CTM. If scan tool displays BUS SHORT TO 5 VOLTS, go to next
step.
8) Disconnect scan tool from DLC. Using external voltmeter,
measure voltage between ground and DLC connector terminal No. 3
(Violet/Brown wire). If voltage is more than 4 volts, repair
Violet/Brown wire for short to voltage. If voltage is 4 volts or less,
go to next step.
9) Measure voltage between ground and DLC connector terminal
No. 11 (White/Black wire). If voltage is more than 4 volts, repair
White/Black wire for short to voltage. If voltage is less than 4
volts, replace scan tool cable or scan tool as necessary.
10) Turn ignition off. Using external ohmmeter, measure
resistance between Powertrain Control Module (PCM) connector C3
terminal No. 30 (Violet/Brown wire) and connector C1 terminal No. 17
(Violet/Black wire). PCM is located at right inner fender. If
resistance is less than 800 ohms, repair short between Violet/Brown
wire and Violet/Black wire. If resistance is 800 ohms or more, go to
next step.
11) Measure resistance between PCM connector C3 terminal No.
28 (White/Black wire) and PCM connector C1 terminal No. 17
(Violet/Black wire). If resistance is less than 800 ohms, repair short\
between Violet/Black and White/Black wires of both connectors. See
wiring diagram for clarification. If resistance is 800 ohms or more,
replace PCM.
BUS SHORT TO BATTERY
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) Turn ignition off. Disconnect Powertrain Control Module
(PCM). PCM is mounted in right side of firewall. Turn ignition on. If
scan tool does not display BUS SHORT TO BATTERY, go to step 10). If
scan tool displays BUS SHORT TO BATTERY, go to next step.
2) Turn ignition off. Disconnect instrument cluster. Turn
ignition on. If scan tool does not display BUS SHORT TO BATTERY,
replace instrument cluster. If scan tool displays BUS SHORT TO
BATTERY, go to next step.
3) Turn ignition off. Disconnect compass mini-trip computer.
Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY,
replace compass mini-trip computer. If scan tool displays BUS SHORT TO
BATTERY, go to next step.
4) Turn ignition off. Disconnect CCD radio. Turn ignition on.
If scan tool does not display BUS SHORT TO BATTERY, replace radio. If
scan tool displays BUS SHORT TO BATTERY, go to next step.
5) Turn ignition off and wait 2 minutes. Disconnect Air Bag
Control Module (ACM). ACM is located under center of instrument panel.\
Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY,
replace ACM. If scan tool displays BUS SHORT TO BATTERY, go to next
step.
6) Turn ignition off. Disconnect Central Timer Module (CTM).\
CTM is located under left side of instrument panel. Turn ignition on.
If scan tool does not display BUS SHORT TO BATTERY, replace CTM. If
scan tool displays BUS SHORT TO BATTERY, go to next step.
7) Turn ignition off. Disconnect anti-lock brake controller
module. Controller module is mounted to top of ABS hydraulic unit.
Turn ignition on. If scan tool does not display BUS SHORT TO BATTERY,
replace anti-lock brake controller module. If scan tool displays BUS

SHORT TO BATTERY, go to next step.
8) Disconnect scan tool from DLC. Using external voltmeter,
measure voltage between ground and DLC connector terminal No. 3
(Violet/Brown wire). If voltage is more than .2 volt, repair
Violet/Brown wire for short to voltage. If voltage is .2 volt or less,
go to next step.
9) Measure voltage between ground and DLC connector terminal
No. 11 (White/Black wire). If voltage is more than .2 volt, repair
White/Black wire for short to voltage. If voltage is less than .2
volt, replace scan tool cable or scan tool as necessary.
10) Turn ignition off. Using external ohmmeter, measure
resistance between ground and Powertrain Control Module (PCM)
connector C1 terminal No. 31 (Black/Tan wire). PCM is located at right\
inner fender, at corner of firewall. If resistance is less than 10
ohms, go to next step. If resistance is 10 ohms or more, repair open
Black/Tan wire.
11) Measure resistance between ground and PCM connector C1
terminal No. 32 (Black/Tan wire). If resistance is less than 10 ohms,
replace PCM. If resistance is 5 ohms or more, repair open Black/Tan
wire.
BUS SHORT TO GROUND
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) Turn ignition off. Disconnect Powertrain Control Module
(PCM). PCM is mounted in right side of firewall. Turn ignition on. If
scan tool does not display BUS SHORT TO GROUND, replace PCM. If scan
tool displays BUS SHORT TO GROUND, go to next step.
2) Turn ignition off. Disconnect anti-lock brake controller
module. Controller module is mounted to top of ABS hydraulic unit.
Turn ignition on. If scan tool does not display BUS SHORT TO GROUND,
replace anti-lock brake controller module. If scan tool displays BUS
SHORT TO GROUND, go to next step.
3) Turn ignition off. Disconnect instrument cluster. Turn
ignition on. If scan tool does not display BUS SHORT TO GROUND,
replace instrument cluster circuit board. If scan tool displays BUS
SHORT TO GROUND, go to next step.
4) Turn ignition off. Disconnect compass mini-trip computer.
Turn ignition on. If scan tool does not display BUS SHORT TO GROUND,
replace compass mini-trip computer. If scan tool displays BUS SHORT TO
GROUND, go to next step.
5) Turn ignition off. Disconnect CCD radio. Turn ignition on.
If scan tool does not display BUS SHORT TO GROUND, replace radio. If
scan tool displays BUS SHORT TO GROUND, go to next step.
6) Turn ignition off and wait 2 minutes. Disconnect Air Bag
Control Module (ACM). ACM is located under center of instrument panel.\
Turn ignition on. If scan tool does not display BUS SHORT TO GROUND,
replace ACM. If scan tool displays BUS SHORT TO GROUND, go to next
step.
7) Turn ignition off. Disconnect Central Timer Module (CTM).\
CTM is located under left side of instrument panel. Turn ignition on.
If scan tool does not display BUS SHORT TO GROUND, replace CTM. If
scan tool displays BUS SHORT TO GROUND, go to next step.
8) Disconnect scan tool from DLC. Using external ohmmeter,
measure resistance between ground and DLC connector terminal No. 3
(Violet/Brown wire). If resistance is less than 700 ohms, repair
Violet/Brown wire for short to ground. If resistance is 700 ohms or

compartment.
* Inspect power window system ground circuit. See WIRING
DIAGRAMS.
RAM PICKUP
Inspect fuse No. 2 (30-amp) located in Power Distribution
Center (PDC). PDC is located in left side of engine compartment.
* Inspect circuit breaker No. 1 (20-amp) in fuse block. Fuse
block is located under left side of instrument panel.
* Inspect power window system ground circuit. See WIRING
DIAGRAMS.
RAM VAN & RAM WAGON
Inspect circuit breaker No. 20 (20-amp) in junction block.
Junction block is located in left end of instrument panel.
* Inspect fuse No. 12 (40-amp) in Power Distribution Center
(PDC). PDC is located in left side of engine compartment.
* Inspect power window system ground circuit. See WIRING
DIAGRAMS.
COMPONENT TESTS
CIRCUIT BREAKER
Dakota, Durango, Ram Pickup, Ram Van & Ram Wagon
1) Locate circuit breaker for power window system. See
TROUBLE SHOOTING. Pull circuit breaker out slightly, but ensure
circuit breaker terminals still contact terminals in fuse block.
2) Connect voltmeter negative lead to ground. Using voltmeter
positive lead, check both terminals of circuit breaker for battery
voltage. If voltmeter indicates battery voltage at both terminals,
circuit breaker is okay.
3) If voltmeter indicates battery voltage at one terminal
only, replace faulty circuit breaker. If voltmeter indicates no
voltage at either terminal, check for an open or shorted circuit to
circuit breaker. Repair as necessary and recheck system operation.
VENT WINDOW MOTOR
Caravan, Town & Country, & Voyager
1) Remove "D" pillar trim panel. See "D" PILLAR TRIM PANEL
under REMOVAL & INSTALLATION. Disconnect vent window motor connector.
Using jumper wires, apply battery voltage to vent window motor
terminals. Motor should rotate in one direction, moving window open or
closed. If window is in full closed or open position, no movement will
be observed and motor will make a grunting noise.
2) Reverse battery leads. Window should move in opposite
direction. If window does not move or window does not make a grunting
noise, replace vent window motor. If window moved completely open and
closed, motor should be reversed one more time to complete a full
window movement inspection.
3) If motor grunts and window does not move, remove motor
assembly. Check window motor crank for binding. Repair as necessary.
Recheck window operation. If window moves, check power window switch
continuity. See POWER WINDOW SWITCH. Replace switch as necessary. If
window switch is okay, check for open circuit between window motor and
window switch. See WIRING DIAGRAMS. Repair as necessary.

Wire). Check for voltage by touching test light probe to harness
connector terminals No. 9 (Tan/Dark Green Wire) and No. 11 (Tan Wire)\
.
3) If test light illuminates, ground circuit and circuit
between battery and switch are okay. If test light does not
illuminate, check power and ground circuits. See WIRING DIAGRAMS.
Dakota & Ram Pickup
1) Check circuit breaker for power window system. See TROUBLE
SHOOTING. Replace circuit breaker as necessary. If circuit breaker is
okay, go to next step.
2) Remove driver's front power window switch. See POWER
WINDOW SWITCH under REMOVAL & INSTALLATION. Check for continuity
between ground and terminal No. 3 at driver power window switch wiring
harness connector. See WIRING DIAGRAMS. If continuity exists, go to
next step. If continuity does not exist, repair open in Black/Light
Green wire (Ram Pickup) or Black wire (Dakota) between driver power
window switch connector and ground.
3) Turn ignition on. Measure voltage between ground and
terminal No. 5 (Tan wire) at driver's power window switch wiring
harness connector. If battery voltage is present, check driver power
window switch. See POWER WINDOW SWITCH under COMPONENT TESTS. If
battery voltage is not present, repair open Tan wire between driver
power window switch connector and ignition switch. See WIRING
DIAGRAMS.
Durango
1) Check circuit breaker for power window system. See TROUBLE
SHOOTING. Replace circuit breaker as necessary. If circuit breaker is
okay, go to next step.
2) Disconnect negative battery cable. Remove driver's front
power window switch. See POWER WINDOW SWITCH under REMOVAL &
INSTALLATION.
3) Check for continuity between ground and terminal No. 5
(Black wire) at driver's power window switch wiring harness connector.\
See WIRING DIAGRAMS. If continuity exists, go to next step. If
continuity does not exist, repair open in Black wire between driver's
power window switch connector and ground.
4) Reconnect negative battery cable. Turn ignition on.
Measure voltage between ground and terminal No. 4 (Tan wire) at
driver's power window switch wiring harness connector. If battery
voltage is present, check driver's power window switch. See POWER
WINDOW SWITCH under COMPONENT TESTS. If battery voltage is not
present, repair open Tan wire between driver power window switch
connector and ignition switch. See WIRING DIAGRAMS.
Ram Van & Ram Wagon
1) Check circuit breaker for power window system. See TROUBLE
SHOOTING. Replace circuit breaker as necessary. If circuit breaker is
okay, go to next step.
2) Remove driver's front power window switch. See POWER
WINDOW SWITCH under REMOVAL & INSTALLATION. Check for continuity
between ground and driver power window switch wiring harness connector
terminal No. 2 (Black wire). If continuity exists, go to next step. If\
continuity does not exist, repair open in Black wire between driver
power window switch connector and ground.
3) Check for battery voltage at driver's power window switch
harness connector terminal No. 5. If battery voltage exists, check
window switch. See POWER WINDOW SWITCH under COMPONENT TESTS. If
battery voltage does not exist, repair open Tan wire.
ONE WINDOW INOPERATIVE
NOTE: Window glass must be free to slide up and down for power

window motor to function properly. If glass is not free to
move up and down, motor will overload and trip the circuit
breaker.
Dakota & Ram Pickup
1) Place window glass halfway between up and down positions.
Verify glass can be moved slightly from side to side, front to rear,
and up and down. If glass does not move freely, check window glass,
tracks and regulator for sticking, binding or improper adjustment.
Repair as necessary and recheck system operation. If glass moves
freely, go to next step.
2) Disconnect negative battery cable. Remove power window
switch from door with inoperative window. Disconnect power window
switch connector. Connect negative battery cable. Turn ignition on.
Check for battery voltage at power window switch harness connector
terminal No. 5 (driver's window) or terminal No. 11 (passenger's
window). If battery voltage does not exist, repair open Tan wire
between junction block and power window switch. If battery voltage
exists, go to next step (inoperative passenger's window) or go step 4)\
(inoperative driver's window).
3) Disconnect negative battery cable. Check for continuity
between ground and passenger window switch harness connector terminals
No. 1 (Brown/White wire) and 2 (Violet/White wire). If continuity
exists, go to next step. If continuity does not exist, repair open
circuit in wiring harness between window switches.
4) Check power window switch. See POWER WINDOW SWITCH under
COMPONENT TESTS. Replace faulty power window switch as necessary. If
switch is okay, go to next step.
5) Check for continuity between window switch wiring
connector terminals and corresponding window motor wire connector
terminals of inoperative power window. If continuity exists in all
circuits, power window switch and switch circuits are okay. Check
power window motor. See POWER WINDOW MOTOR under COMPONENT TESTS. If
continuity does not exist in one or more circuits, repair open
circuit(s) as necessary. Recheck system operation.
Durango
1) Place window glass halfway between up and down positions.
Verify glass can be moved slightly from side to side, front to rear,
and up and down. If glass does not move freely, check window glass,
tracks and regulator for sticking, binding or improper adjustment.
Repair as necessary and recheck system operation. If glass moves
freely, and is not driver's window, go to next step. If driver's
window is inoperative, check power window motor. See POWER WINDOW
MOTOR under COMPONENT TESTS. If Auto Down feature is the only problem,
replace driver's switch. If switch LED is the only problem, replace
unlit switch.
2) Disconnect negative battery cable. Remove power window
switch from door with inoperative window. See POWER WINDOW SWITCH
under REMOVAL & INSTALLATION. Connect negative battery cable. Turn
ignition on. Check for battery voltage at power window switch harness
connector Yellow wire. If battery voltage does not exist, repair open
circuit to master window switch. If battery voltage exists, go to next
step.
3) Test power window switch continuity. See POWER WINDOW
SWITCH under COMPONENT TESTS. Replace faulty switch as necessary. If
switch is okay, go to next step.
4) Check for continuity in each circuit between master window
switch and switch for inoperative window. See WIRING DIAGRAMS. If
continuity does not exist in any circuit, repair open circuit as
necessary. If continuity exists in all circuits, test power window
motor. See POWER WINDOW MOTOR under COMPONENT TESTS.

Ram Van & Ram Wagon
1) Place window glass halfway between up and down positions.
Verify glass can be moved slightly from side to side, front to rear,
and up and down. If glass does not move freely, check window glass,
tracks and regulator for sticking or binding. Repair as necessary and
recheck system operation. If glass moves freely, go to next step.
2) Disconnect negative battery cable. Disconnect and remove
power window switch in door with inoperative window. See POWER WINDOW
SWITCH under REMOVAL & INSTALLATION. Connect negative battery cable.
Turn ignition on. Measure voltage between passenger power window
switch wiring harness connector terminal (Tan wire) or driver power
window switch wiring harness connector terminal (Tan wire) and ground.\
See WIRING DIAGRAMS. If battery voltage is not present, repair open
Tan wire as necessary. If battery voltage exists, and inoperative
window is on driver side, go to step 4). If battery voltage exists,
and inoperative window is on passenger side, go to next step.
NOTE: Passenger's power window switch is grounded through driver's
power window switch.
3) Disconnect negative battery cable. Check continuity
between ground and passenger's power window switch harness connector
terminals No. 2 (Brown/White wire) and No. 4 (Violet/White wire). Se\
e
WIRING DIAGRAMS. If continuity exists on both circuits, go to step 5).
If continuity does not exist on either or both circuits, repair open
circuit.
4) Check power window switch. See POWER WINDOW SWITCH under
COMPONENT TESTS. Replace faulty power window switch as necessary. If
switch is okay, go to next step.
5) Using an ohmmeter, check continuity of each circuit
between inoperative power window switch wiring harness connector and
corresponding power window motor wiring harness connector terminal.
See WIRING DIAGRAMS. If continuity does not exist in one or more
circuits, repair open circuit(s) as necessary. Recheck system
operation. If continuity exists in all circuits, power window switch
and switch circuits are okay. Check power window motor. See POWER
WINDOW MOTOR under COMPONENT TESTS.
REMOVAL & INSTALLATION
CAUTION: When battery is disconnected, vehicle computer and memory
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.
DOOR TRIM PANEL
Removal & Installation (Caravan, Town & Country, & Voyager)
1) Using a trim stick, pry courtesy light from door trim.
Disconnect courtesy light connector. Remove door assist handle (if
equipped). Remove door pull cup (if equipped). Remove screws attachin\
g
trim panel to door below map pocket (if equipped). Using a trim stick,\
remove screw cover from switch panel.
2) Remove screws securing switch panel to door trim and
remove panel. Using a trim stick, remove seat/mirror memory switch (if
equipped). Remove screw securing door trim to door panel from behind
inside latch release handle.
3) Disengage clips holding door trim to door frame around
perimeter of panel. Tilt top of trim panel away from door to gain
access to latch linkage. Disengage clip holding linkage rod to inside
latch release handle. Separate linkage rod from latch handle. Remove

door trim panel. To install, reverse removal procedure.
Removal & Installation (Dakota & Durango)
Lower window to full down position, if possible. Remove
screws attaching trim panel to door. Lift panel up and outward to
release retainers. Disconnect door handle linkage and all wiring.
remove trim panel. To install, reverse removal procedure.
Removal & Installation (Ram Pickup)
Lower window to full down position, if possible. Remove
screws attaching trim panel to door. Remove window switch. Using trim
tool, disconnect clips around edge of door. Lift panel up and outward
to release retainers. Disconnect door handle linkage and all wiring.
remove trim panel. To install, reverse removal procedure.
Removal & Installation (Ram Van & Ram Wagon)
Remove screw attaching trim panel pull cup to door. Remove
screw attaching door handle bezel to door. Remove screws attaching
trim panel to door. Using trim tool, disconnect clips around edge of
trim panel. Remove trim panel. To install, reverse removal procedure.
"D" PILLAR TRIM PANEL
Removal & Installation (Caravan, Town & Country, & Voyager -
Left Side)
1) Remove rear header trim cover. Remove liftgate sill plate.
On long wheelbase models, remove second rear seat belt turning loop.
On short wheelbase models, remove bolt securing second rear seat belt
lower anchor to quarter panel.
2) On all models, remove jack storage cover. Remove "D" panel
retaining screws. Using a trim stick, gently pry around perimeter of
"D" pillar trim panel and separate trim panel from inner quarter
panel. Disconnect rear speaker connector (if equipped).
3) On short wheelbase models, pass seat belt through slot in
"D" pillar. On all models, remove "D" pillar trim panel. To install,
reverse removal procedure.
Removal & Installation (Caravan, Town & Country, & Voyager -
Right Side)
1) Remove rear header trim cover. Remove liftgate sill plate.
On long wheelbase models, remove second rear seat belt turning loop.
On short wheelbase models, remove bolt securing second rear seat belt
lower anchor to quarter panel. Remove quarter panel trim bolster.
2) On all models, remove "D" panel retaining screws.
Disengage hidden "D" pillar trim panel clips. Separate "D" pillar trim
panel from "D" pillar. Disconnect rear speaker connector (if
equipped). Remove trim panel. To install, reverse removal procedure.
POWER WINDOW MOTOR
Removal & Installation (Caravan, Town & Country, & Voyager)
1) Disconnect negative battery cable. Remove door trim panel.
See DOOR TRIM PANEL. Remove watershield. Tape window in its existing
position. Cut and discard window motor tie wrap. Disconnect window
motor connector. Remove window motor mounting screws/nuts.
2) Remove window motor and cables from door and allow to hang
from door. Do not remove drum and cables at this time. Install NEW
window motor in door. Tighten screws/nuts to 30-40 INCH lbs. (3.4-4.5
N.m). Remove drum cover plate from faulty window motor. See Fig. 7.
Lift cable guide, drum and cables from motor.
CAUTION: DO NOT allow drum to separate from cable guide, by dropping
drum or letting cables unwind.