Ignition system DODGE RAM 1999 Service Repair Manual

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

Switch Position Between Terminals
Off .......................................................... 6 & 7
Delay (1) ............................... 8 & 9; 2 & 4; 1 & 2; 1 & 4
Low .......................................................... 4 & 6
High ......................................................... 4 & 5
Wash ......................................................... 3 & 4
( 1) - At maximum delay position, resistance should be 270-330 k/ohms
between all terminal pairs listed. At minimum delay position,
resistance should be zero when ohmmeter is set on high ohm scale
between all terminal pairs listed.









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Fig. 2: Identifying Wiper/Washer Switch Terminals
Courtesy of Chrysler Corp.
SYSTEM TESTS
WARNING: All vehicles are equipped with air bag restraint systems. See
appropriate AIR BAG RESTRAINT SYSTEMS article before
servicing steering wheel or column. Use extreme caution to
avoid personal injury and vehicle damage.
NOTE: If problem occurs in electronic components, wiring, wiper
switch or wiper motor, a Diagnostic Trouble Code (DTC) will
be stored in BCM. For testing procedures, see appropriate
BODY CONTROL COMPUTER TESTS article.
WASHER
NOTE: Following testing applies when pump does not operate. If pump
operates, see TROUBLE SHOOTING.
1) Turn ignition on. Turn wiper switch on. If wipers operate,
go to next step. If wipers do not operate, diagnose wiper problem
first. See WIPER.

NOTE: This testing applies to base model Ram Pickup. For high line
Ram Pickup testing, see appropriate BODY CONTROL COMPUTER
TESTS article.
NOTE: Wiper system utilizes a Central Timer Module (CTM) to control\
intermittent functions of wiper system. If problem is only
pulse wipe or wipe-after-wash, see WASHER.
1) Check fuse No. 6 (25-amp) in junction block. If fuse is
blown, replace fuse and repair short as necessary. If fuse is okay, go
to next step.
2) Turn ignition on. Check for battery voltage at fuse. If
battery voltage does not exist, repair open circuit between fuse and
ignition switch as necessary. If battery voltage exists, go to next
step.
3) Turn ignition off. Disconnect negative battery cable.
Disconnect multifunction switch harness connector. Connect negative
battery cable. Turn ignition on. Check for battery voltage at
multifunction switch harness connector terminal No. 4 (Dark Blue
wire). See Fig. 2. If battery voltage exists, go to next step. If
battery voltage does not exist, repair open in Dark Blue wire between
fuse and multifunction switch.
4) If problem is intermittent wipe feature only, go to next
step. If problem is with all wiper modes or only HI and/or LO speed
modes, go to step 7).
5) Turn ignition off. Disconnect negative battery cable.
Disconnect CTM 14-pin harness connector. Check continuity between
multifunction switch harness connector terminal No. 1 (White/Dark Blue
wire) and CTM 14-pin harness connector terminal No. 12 (White/Dark
Blue wire). See Fig. 3. If continuity does not exist, repair open in
White/Dark Blue wire. If continuity exists, go to next step.
6) Check continuity between multifunction switch harness
connector terminal No. 2 (Violet wire) and CTM 14-pin harness
connector terminal No. 3 (Violet wire). If continuity does not exist,
repair open in Violet wire. If continuity exists, check intermittent
relay. See INTERMITTENT WIPER RELAY under COMPONENT TESTS.
7) Check continuity between multifunction switch harness
connector terminals No. 6 (Brown/White wire) and No. 9 (Brown/White
wire). If continuity does not exist, repair open in Brown/White wire.
If continuity exists, go to next step.
8) Check multifunction (wiper/washer) switch. See
WIPER/WASHER SWITCH under COMPONENT TESTS. If switch tests okay,
connect switch and go to next step. If switch does not test okay,
replace multifunction switch.
9) Turn ignition off. Disconnect negative battery cable.
Access wiper motor harness connector. Check resistance between wiper
motor harness connector Black wire terminal and ground. If resistance
is more than zero ohms, repair open in Black wire. If resistance is
zero ohms, go to next step.
10) Connect negative battery cable. Turn ignition on. Check
voltage by backprobing at wiper motor harness connector terminals
listed with multifunction switch in appropriate position. See SWITCH
POSITION VOLTAGE TEST table. If battery voltage exists at each
terminal, go to next step. If battery voltage does not exist at any
terminal, repair open in appropriate wire.
SWITCH POSITION VOLTAGE TEST









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Switch Position Wiper Motor Terminal
Any .............................................................. 3
Low .............................................................. 4