1999 DODGE RAM Service Repair Manual

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IGNITION SWITCH CIRCUIT FUNCTIONS








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Terminal No. (Wire Color) Circuit\
1 (DK BLU/YEL) ...................... Ignition Switch Output (START\
)
2 (DK BLU) ...................... Ignition Switch Output (START/RUN\
)
3 (GRY/BLK) (1) ..................... Red Brake Warning Light Driver
4 (PNK/BLK) ............................... Battery Feed To Ignition\
5 (BLK/ORG) ........................... Ignition Switch Output (RUN\
)
6 (BLK/WHT) ....................... Ignition Switch Output (ACC/RUN\
)
7 (RED) ................................... Battery Feed To Ignition\
( 1) - White wire on Dakota and Durango.









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Fig. 2: Identifying Ignition Switch Connector Terminals (Harness
Side)
Courtesy of Chrysler Corp.
MULTIFUNCTION SWITCH
Turn Signal/Hazard Warning Switch
Disconnect negative battery cable. Remove multifunction
switch. See MULTIFUNCTION SWITCH under REMOVAL & INSTALLATION. Check
continuity between appropriate multifunction switch terminals with
switch in specified position. See MULTIFUNCTION SWITCH TURN SIGNAL
TESTING table. See Fig. 3. If continuity is not as specified, replace
multifunction switch.
MULTIFUNCTION SWITCH TURN SIGNAL TESTING









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Switch Position Continuity Between Terminals
Neutral
Hazard Warning On ............................ 11, 12, 13, 15 & 16
Hazard Warning Off ................................... 12, 14 & 15
Left .......................................... 12 & 14; 15, 16 & 17
Right ......................................... 14 & 15; 11, 12 & 17
Optional Corner Lights
Left ..................................................... 22 & 23
Right .................................................... 23 & 24









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Fig. 3: Identifying Multifunction Switch Terminals
Courtesy of Chrysler Corp.
SYSTEM TESTS
HORN
1) Check resistance between horn mounting bracket and ground.
If resistance is zero ohms, go to next step. If resistance is not zero
ohms, repair horn ground connection.
2) Check for battery voltage at horn harness connector when
horn switch is pressed. If battery voltage exists, replace horn. If
battery voltage does not exist, go to next step.
3) Test horn relay. See HORN RELAY under COMPONENT TESTS. If
relay is okay, check horn circuit. See HORN RELAY CIRCUIT. If relay is
not okay, replace horn relay.
HORN RELAY CIRCUIT
1) Remove horn relay from Power Distribution Center (PDC).
Measure voltage between ground and horn relay terminals No. 30 and 86
in PDC. See Fig. 4. If battery voltage exists at both terminals, go to
next step. If battery voltage does not exist at one or both terminals,
repair open circuit to PDC.
2) Disconnect both horn connectors. Check continuity between
horn relay terminal No. 87 in PDC and Dark Green/Red wire at each horn
harness connector. If continuity exists, go to next step. If
continuity does not exist, repair open in Dark Green/Red wire.
3) Check continuity between ground and relay terminal No. 85
in PDC. With horn switch depressed, continuity should exist. With horn
switch released, continuity should not exist. If continuity is not as
specified, go to HORN SWITCH. If continuity is as specified, no fault
is indicated in relay circuits.

Fig. 4: Identifying Horn Relay Terminals In PDC
Courtesy of Chrysler Corp.
HORN SWITCH
1) Disconnect negative battery cable. Remove steering column
opening cover from instrument panel. Check continuity between ground
and metal steering column jacket. If continuity exists, go to next
step. If continuity does not exist, check for proper installation of
steering column mounting nuts.
2) Disable air bag system and remove driver's air bag module.
See appropriate AIR BAG RESTRAINT SYSTEMS article. Remove horn relay
from Power Distribution Center (PDC). Use label on PDC cover to
identify and locate relay. Check continuity between horn relay
terminal No. 85 in PDC and Black/Red wire at steering column horn

switch connector. See Fig. 4. If continuity does not exist, repair
open Black/Red wire. If continuity exists, go to next step.
3) Check continuity between ground and Black/Red wire at
steering column horn switch connector. If continuity does not exist,
go to next step. If continuity exists, repair short to ground in
Black/Red wire.
4) Continuity between horn switch terminal and ground.
Continuity should exist with horn switch depressed. Continuity should
not exist without horn switch depressed. If continuity is not as
specified, replace horn switch. If continuity is as specified, install
horn relay and go to HORN under COMPONENT TESTS.
TURN SIGNAL & HAZARD WARNING SYSTEMS
1) If bulbs burn out rapidly, check charging system for
overcharging condition. See appropriate GENERATORS & REGULATORS
article in STARTING & CHARGING SYSTEMS. If charging system is okay, go
to next step. If charging system is not okay, repair as necessary.
2) If problem is turn signals failing to cancel after a turn,
inspect multifunction switch or cancelling cam lobes on clockspring
for damage or improper installation. If problem exists, repair as
necessary. If problem does not exist, go to next step.
3) Turn ignition on. Actuate turn signal switch or hazard
warning switch. Observe turn signal indicator light(s) in instrument
cluster. If flash rate is very high, check for a bulb that is not lit
or is dimly lit. Repair circuit or replace bulb as necessary. If turn
signals fail to light, go to next step.
4) Turn ignition off. Check turn signal fuse in junction
block and/or hazard warning fuse in PDC. If fuses are okay, go to next
step. If either fuse is blown, repair short circuit and replace fuse.
5) Check for battery voltage at hazard warning fuse in PDC.
Turn ignition on. Check for battery voltage at turn signal fuse in
junction block. If battery voltage exists, go to next step. If battery
voltage does not exist, repair open circuit to battery or ignition
switch as necessary.
6) Turn ignition off. Disconnect negative battery cable.
Remove combination flasher from junction block and replace with a
known good unit. Connect battery cable and test operation of turn
signal and hazard warning systems. If operation is okay, discard
faulty flasher. If operation is not okay, go to next step.
7) Turn ignition on. Check for battery voltage at combination
flasher terminals No. 51 and 48 in junction block. If battery voltage
exists, go to next step. If battery voltage does not exist, repair
open circuit to fuse in junction block or PDC as necessary.
8) Disconnect negative battery cable. Check continuity
between combination flasher terminal No. 50 and ground. If continuity
exists, go to next step. If continuity does not exist, repair open
ground circuit.
9) Disconnect multifunction switch harness connector. Check
continuity between junction block terminal No. 4 and multifunction
switch terminal No. 13 (Pink wire). If continuity exists, go to next
step. If continuity does not exist, repair open in Pink wire between
multifunction switch and junction block.
10) Check continuity between junction block terminal No. 13
and multifunction switch terminal No. 17 (Red/White wire). If
continuity exists, test multifunction switch. See MULTIFUNCTION SWITCH
under COMPONENT TESTS. If continuity does not exist, repair open in
Red/White wire between junction block and multifunction switch.
REMOVAL & INSTALLATION
WARNING: Deactivate air bag system before performing any service

operation involving steering column components. See
appropriate AIR BAG RESTRAINT SYSTEMS article. DO NOT apply
electrical power to any component on steering column without
first deactivating air bag system. Air bag may deploy.
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.
HORN SWITCH
NOTE: Horn switch removal and installation information for Dakota
and Durango is not provided by manufacturer.
Removal & Installation
Disconnect negative battery cable. Remove 4 air bag nuts from
back of steering wheel. Pull air bag module back far enough to
disconnect wiring connectors. Remove air bag module. To install,
reverse removal procedure. Tighten air bag nuts to 90-97 INCH lbs. (9-
11 N.m).
IGNITION SWITCH
CAUTION: DO NOT bump, jolt or hammer on steering shaft and gearshift
tube.
Removal
Remove lock cylinder. See LOCK CYLINDER. Remove 3 tamper-
proof Torx screws. See Fig. 5. Gently pull switch away from column.
Release connector locks on wiring connectors and remove switch from
connectors.
Fig. 5: Removing Ignition Switch Mounting Screws
Courtesy of Chrysler Corp.
Installation
1) Rotate flag on ignition switch to RUN position. This

allows lock cylinder to mesh with switch. With key in lock cylinder,
turn lock cylinder to RUN position so retaining pin can be depressed.
Install lock cylinder in ignition switch (aligning slot) until
retaining pin engages. Turn key to OFF or LOCK position.
2) Pull on lock cylinder to ensure retaining pin is retained
in ignition switch and cylinder will not come out. On vehicles with
automatic transmission, ensure shifter is in Park and dowel pin on
ignition switch is in Park position. Ensure ignition switch is in LOCK
position. On all models, ensure flag on ignition switch is properly
indexed in Park position. The flag operates steering lock.
3) On vehicles with automatic transmission, apply a light
coating of grease to park lock dowel and park lock slider linkage. See
Fig. 6. Slide park lock slider linkage forward completely, then back .
25" (6 mm). Apply a light coating of grease to column lock flag.
4) Carefully install ignition switch on steering column,
ensuring flag is positioned above steering wheel lock lever, dowel
pins on switch align in holes on steering column and park lock dowel
pin slides into park lock slider linkage (automatic transmission
only). See Fig. 7. Tighten mounting screws to 22-30 INCH lbs. (2.5-3.5
N.m).
5) Connect wiring connectors to ignition switch. Install
upper and lower steering column covers. Tighten screws to 17 INCH lbs.
(2 N.m). Install tilt lever (if equipped). Reconnect negative batter\
y
cable. Check for proper operation of ignition switch in all positions.
Check for proper steering wheel lock operation. Check for proper
automatic shift lock operation.
Fig. 6: Positioning Park Lock Slider Linkage
Courtesy of Chrysler Corp.

Fig. 7: Positioning Column Lock Flag
Courtesy of Chrysler Corp.
LOCK CYLINDER
Removal
Disconnect and isolate negative battery cable. On tilt
columns, remove tilt lever. Remove upper and lower steering column
covers. Place shifter in Park (if vehicle has automatic transmission).\
With key inserted and ignition switch in RUN position, press on
retaining pin. See Fig. 8. Remove lock cylinder.
Installation
1) With key in lock cylinder, turn lock cylinder to RUN
position so retaining pin can be depressed. Install lock cylinder in
ignition switch (aligning slot) until retaining pin engages. Turn key
to OFF or LOCK position. Pull on lock cylinder to ensure retaining pin
is retained in ignition switch and cylinder will not come out.
2) Install upper and lower steering column covers. Tighten
screws to 17 INCH lbs. (2 N.m). Install tilt lever (if equipped).
Connect negative battery cable. Check for proper operation of ignition
switch in all positions. Check for proper steering wheel lock
operation. Check for proper automatic shift lock operation.

Fig. 8: Removing Lock Cylinder
Courtesy of Chrysler Corp.
MULTIFUNCTION SWITCH
Removal & Installation
Disconnect negative battery cable. On tilt columns, remove
tilt lever. On all models, remove upper and lower steering column
covers. Remove tamper-proof Torx screws. Pull switch away from column,
and loosen connector screw (screw remains in connector). Remove
switch. To install, reverse removal procedure. Tighten screws to
specification. See TORQUE SPECIFICATIONS.