1999 DODGE NEON Service Repair Manual

DEPLOYED MODULE
REMOVAL
When removing a deployed module, rubber gloves,
eye protection, and a long-sleeved shirt should beworn, as there may be deposits on the surface which
could irritate the skin and eyes.
(1) Disconnect and isolate the battery negative
cable.
(2) Roll/fold airbag towards instrument panel.
(3) Close door over folded airbag and tape door
closed.
(4) Remove instrument panel top cover (Fig. 23).
(5) Remove instrument panel right trim panel.
(6) Open glove box and push the sides inward
allowing the door bumper to pass and box to open.
(7) Remove the four trim screws which attach the
module to the top instrument panel (Fig. 24).
(8) Remove two module attaching nuts from the
support structure.
(9) Lift module up until the wire connector is visi-
ble and disconnect the 4-way wire connector from
module. Unlock the red locking tab and compress
lock to release the connector.
INSTALLATION
For installation, reverse the above procedures.
Ensure that the red locking tab is in the lock position
after installing the connector. Tighten trim screws to
2 N´m (20 in. lbs.) torque. Tighten the module nuts to
22 to 34 N´m (200 to 300 in. lbs.) torque. Do not con-
nect battery negative cable. Refer to Diagnosis and
Testing for Airbag System Test procedures.
STEERING WHEEL
WARNING: DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE (GROUND) CABLE BEFORE
BEGINNING ANY AIRBAG SYSTEM COMPONENT
REMOVAL OR INSTALLATION PROCEDURE. THIS
WILL DISABLE THE AIRBAG SYSTEM. FAILURE TO
DISCONNECT BATTERY COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
ALLOW SYSTEM CAPACITOR TO DISCHARGE
FOR 2 MINUTES BEFORE REMOVING ANY AIRBAG
COMPONENTS.
REMOVAL
(1) Adjust the steering wheel so that the tires are
in the straight ahead position then:
²Rotate the steering wheel half turn (180
degrees) to the right (clockwise)
²Lock column with the ignition cylinder lock
(2) Disconnect and isolate the battery negative
cable.
(3) Remove the speed control switches and discon-
nect the wire connectors or covers.
(4) Remove the Driver Airbag Module attaching
bolts from the back of steering wheel.
Fig. 23 Instrument Panel
Fig. 24 Passenger Airbag Module
Fig. 25 Airbag Module Connector
8M - 10 RESTRAINT SYSTEMPL
REMOVAL AND INSTALLATION (Continued)

(5) Lift module and disconnect the airbag and horn
wire connectors.
(6) Remove steering wheel retaining nut.
(7) Remove the steering wheel with a steering
wheel puller. While removing the steering wheel take
care to feed the wires gently through the holes in the
clockspring armature.
INSTALLATION
(1) Confirm that:
²The steering wheel position is a half turn (180
degrees) to the right (clockwise)
²The column is locked with the ignition cylinder
lock.
²Check that the turn signal stalk is in the neu-
tral position
(2) Install the steering wheel ensuring the flats on
hub align with the clockspring. Pull the horn lead,
airbag and speed control leads through the larger
slot. Ensure leads do not get pinched under the steer-
ing wheel.
(3) Install the steering wheel retaining nut, and
tighten it to 61 N´m (45 ft. lbs.) torque.
(4) Install the airbag module. Refer to Driver Air-
bag Module Removal and Installation for proper pro-
cedures.
(5) Do not connect the battery negative cable.
Refer to Diagnosis and Testing for Airbag System
Test procedures.
ADJUSTMENTS
CLOCKSPRING CENTERING PROCEDURE
If the rotating tape within the clockspring is not
positioned properly with the steering wheel and the
front wheels, the clockspring may fail during use.
The following procedure MUST BE USED to center
the clockspring if:²The clockspring is not known to be properly
positioned
²The front wheels were moved
²The steering wheel was moved from the half
turn (180 degrees) to the right (clockwise) position.
WARNING: DISCONNECT AND ISOLATE THE BAT-
TERY NEGATIVE (GROUND) CABLE BEFORE
BEGINNING ANY AIRBAG SYSTEM COMPONENT
REMOVAL OR INSTALLATION PROCEDURE. THIS
WILL DISABLE THE AIRBAG SYSTEM. FAILURE TO
DISCONNECT BATTERY COULD RESULT IN ACCI-
DENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
ALLOW SYSTEM CAPACITOR TO DISCHARGE
FOR 2 MINUTES BEFORE REMOVING ANY AIRBAG
COMPONENTS.
(1) Remove clockspring, refer to Clockspring
Removal.
(2) Rotate the clockspring rotor in the CLOCK-
WISE DIRECTION to the end of travel. Do not apply
excessive torque.
(3) From the end of travel, rotate the rotor two full
turns and a half in the counterclockwise direction.
The horn wire and the squib wire should end up at
the bottom. If not, rotate the rotor counter clockwise
until the wires are properly orientated, but not more
than half turn (180 degrees). Engage clockspring
locking mechanism.
(4) For installation, refer to Clockspring Installa-
tion
(5) Do not connect battery negative cable. Refer to
Diagnosis and Testing for Airbag System Test
procedures.
PLRESTRAINT SYSTEM 8M - 11
REMOVAL AND INSTALLATION (Continued)

ELECTRICALLY HEATED SYSTEMS
CONTENTS
page page
DESCRIPTION AND OPERATION
INTRODUCTION......................... 1
REAR WINDOW DEFOGGER SWITCH........ 1
DIAGNOSIS AND TESTING
DEFOGGER SYSTEM..................... 1GRID LINES............................ 2
REAR WINDOW DEFOGGER SWITCH........ 2
SERVICE PROCEDURES
GRID LINE AND TERMINAL REPAIR......... 3
DESCRIPTION AND OPERATION
INTRODUCTION
For proper operation of the Rear Window Defogger
system refer to the Owner's Manual.
The system consists of a rear glass with two verti-
cal bus bars and a series of electrically connected
grid lines fired on the inside surface. A control switch
and a timer relay combined into a single assembly is
used on all models (Fig. 1).
Circuit protection is provided by a maxi fuse,
located in the Power Distribution Center, for the
heated grid circuit and by a fuse for the relay control
circuit.
When the switch is turned to the ON position, cur-
rent is directed to the rear defogger grid lines. The
heated grid lines heat the rear glass to clear the sur-
face of fog or frost.
CAUTION: Grid lines can be damaged or scraped
off with sharp instruments, care should be taken in
cleaning glass or removing foreign materials,
decals or stickers. Normal glass cleaning solvents
or hot water used with rags or toweling is recom-
mended.
REAR WINDOW DEFOGGER SWITCH
The rear window defogger switch is a control
switch and timer relay integrated into a single panel
mounted assembly. Actuating the switch energizes
the circuit which allows current to flow through the
grid lines. Upon initial actuation for approximately
eight to ten minutes, or until either the switch or
ignition is turned off. An indicating lamp illuminates
a lens inlaid in the control switch.
DIAGNOSIS AND TESTING
DEFOGGER SYSTEM
Electrically heated rear window defogger operation
can be checked in vehicle in the following manner:
(1) Turn ignition switch to the ON position.
(2) Connect an ammeter in series with the battery.
Push the defogger control switch to the ON position.
A distinct increase in amperage draw should be
noted.
(3) The rear window defogger operation can be
checked by feeling the glass. A distinct difference in
temperature between the grid lines and adjacent
clear glass can be detected in three to four minutes
of operation.
(4) Using a DC voltmeter, connect negative lead to
Point B, and the positive lead to Point A (Fig. 2). The
voltmeter should read 10-14 volts.
(5) Step 2, Step 3 or Step 4 above will confirm
system operation. Indicator light illumination means
that there is power available at the output of the
relay only, and does not necessarily verify system
operation.
Fig. 1 Rear Window Defogger
PLELECTRICALLY HEATED SYSTEMS 8N - 1

(6) If turning the switch ON produced no distinct
current draw on the ammeter the problem should be
isolated in the following manner:
(a) Confirm the ignition switch is ON.
(b) Ensure that the heated rear glass feed wire
is connected to the terminal or pigtail and that the
ground wire is in fact grounded.
(c) Ensure that the maxi-fuse and control circuit
fuse are OK and all electrical connections are
secure.
(7) When the above steps have been completed and
the system is still inoperative, one or more of the fol-
lowing is defective:
(a) Control switch/timer relay module.
(b) All rear window grid lines would have to be
broken or one of the feed wires are not connected
for the system to be inoperative.
(8) If turning the switch ON produces severe volt-
meter deflection, the circuit should be closely checked
for a shorting condition.
(9) If the system operation has been verified but
indicator lamp does not light, replace the switch.
(10) For detailed wiring information, refer to group
8W, Wiring Diagrams.
GRID LINES
The horizontal grid lines and vertical bus bar lines
printed and fired on inside surface of rear window
glass (Fig. 2) comprise an electrical parallel circuit.
The electrically conductive lines are composed of a
silver-ceramic material which when fired on glass
becomes bonded to the glass and is highly resistant
to abrasion. It is possible, however, that a break may
occur in an individual grid line resulting in no cur-
rent flow through the line. To detect breaks in grid
lines the following procedure is required:
(1) Turn ignition ON and turn control switch to
ON. The indicator light should come on.(2) Using a DC voltmeter with 0-15 volt range,
contact terminal B with negative lead of voltmeter.
With positive lead of voltmeter, contact terminal A
(Fig. 2). The voltmeter should read 10-14 volts. A
lower voltage reading indicates a poor connection in
the feed or the ground circuit.
(3) With negative lead of voltmeter, contact a good
body ground point. The voltage reading should not
change.
(4) Connect negative lead of voltmeter to terminal
B and touch each grid line at Mid-Point with Positive
lead. A reading of:
²Approximately 6 volts indicates the line is OK
²0 volts indicates a break in line between Mid-
Point C and terminal A
²10-14 volts indicates a break between Mid-Point
C and terminal B
Move the lead toward the break and voltage will
change as soon as break is crossed. Refer to (Fig. 2)
and (Fig. 3).
REAR WINDOW DEFOGGER SWITCH
The rear window defogger switch may be tested in-
vehicle or bench tested. In vehicle testing is accom-
plished in the following manner:
(1) Remove the switch from the instrument panel
but leave the switch connected, refer to Group 8E,
Fig. 2 Rear Glass Grid Line Test
Fig. 3 Systems Electrical Circuit
8N - 2 ELECTRICALLY HEATED SYSTEMSPL
DIAGNOSIS AND TESTING (Continued)

Instrument Panel and Systems for removal proce-
dures.
(2) Turn the ignition switch ON.
(3) Using a voltmeter, check for battery voltage at
Pin 3 and Pin 4 (Fig. 3), (Fig. 4).
(a) If OK, go to Step 4.
(b) If NOT OK, check fuse 8 in fuse block and
the 30 Amp maxi fuse in the Power Distribution
Center (PDC). If fuses are OK, check wiring cir-
cuit. Refer to Group 8W, Wiring Diagrams.
(4) Check Pin 5, with switch in the ON position
there should be battery voltage and no voltage in the
OFF position.
(a) If OK, go to Step 5.
(b) If NOT OK, no voltage in the ON position or
voltage in the OFF position. Replace the switch/re-
lay module.
(5) Press switch to ON position. The indicator
lamp should come on and remain on for approxi-
mately 10 minutes. If the indicator lamp fails to light
or no voltage is present for approximately 10 min-
utes. Replace Rear Window Defogger Switch.
(6) To bench test relay:
(a) Using a jumper wire connect a 12 volt batter
supply, apply voltage to Pin 3 and 4. Ground Pin 2.
(b) Follow the above procedures except Step 2
SERVICE PROCEDURES
GRID LINE AND TERMINAL REPAIR
WARNING: REPAIR KIT MAY CAUSE SKIN OR EYE
IRRITATION. CONTAINS EPOXY RESIN AND AMINE
TYPE HARDENER, HARMFUL IF SWALLOWED.
AVOID CONTACT WITH SKIN AND EYES. FOR SKIN,
WASH AFFECTED AREAS WITH SOAP AND WATER.
DO NOT TAKE INTERNALLY. IF TAKEN INTER-
NALLY, INDUCE VOMITING; CALL A PHYSICIAN
IMMEDIATELY. IF IN CONTACT WITH EYES, FLUSH
WITH PLENTY OF WATER. USE WITH ADEQUATEVENTILATION. DO NOT USE NEAR FIRE OR FLAME.
CONTENTS CONTAIN 3 PERCENT FLAMMABLE
SOLVENTS.
KEEP OUT OF REACH OF CHILDREN.
The repair of the grid lines or the terminal is pos-
sible using the MopartRepair Package or equiva-
lent.
(1) Mask repair area so conductive epoxy can be
extended onto the line or the bus bar (Fig. 5).
(2) Follow instructions in repair kit for preparing
damaged area.
(3) Remove package separator clamp and mix plas-
tic conductive epoxy thoroughly. Fold in half and cut
center corner to dispense epoxy.
(4) For grid line, mark off area to be repaired with
masking tape or a template (Fig. 5).
(5) Apply conductive epoxy through slit in masking
tape. Overlap both ends of the break by 19 mm (3/4
inch).
(6) For a terminal or pigtail replacement, mask
adjacent areas so epoxy can be extended onto line as
well as bus bar. Apply a thin layer of epoxy to area
where terminal was fastened and to adjacent line.
(7) Apply a thin layer of conductive epoxy on ter-
minal and place terminal on desired location. To pre-
vent terminal from moving while the epoxy is curing,
it must be wedged or clamped.
(8) Carefully remove masking tape from grid line.
CAUTION: Do not allow the glass surface to
exceed 204ÉC (400ÉF), glass may fracture.
(9) Allow epoxy to cure 24 hours at room tempera-
ture or use heat gun with a 260Éto 371ÉC (500É to
700ÉF) range for 15 minutes. Hold gun approximately
254 mm (10 inches) from repaired area.
(10) After conductive epoxy is properly cured
remove wedge from terminal and check out operation
of rear window defogger. Do not attach connectors
until curing is complete.
Fig. 4 Rear Window Defogger Switch
Fig. 5 Grid Line Repair
PLELECTRICALLY HEATED SYSTEMS 8N - 3
DIAGNOSIS AND TESTING (Continued)

ELECTRICALLY HEATED SYSTEMS
CONTENTS
page page
DIAGNOSIS AND TESTING
REAR WINDOW DEFOGGER SWITCH....... 1REMOVAL AND INSTALLATION
REAR WINDOW DEFOGGER AND/OR REAR
FOG LAMP SWITCH................... 2
DIAGNOSIS AND TESTING
REAR WINDOW DEFOGGER SWITCH
The rear window defogger switch may be tested in-
vehicle or bench tested. In vehicle testing is accom-
plished in the following manner:
(1) Remove the switch from the instrument panel
but leave the switch connected, refer to Group 8E,
Instrument Panel and Systems for removal proce-
dures.
(2) Turn the ignition switch ON.
(3) Using a voltmeter, check for battery voltage at
Pin 3 and Pin 4 (Fig. 1) and (Fig. 2).
(a) If OK, go to Step 4.
(b) If NOT OK, check fuse 8 in fuse block and
the 30 Amp maxi fuse in the Power Distribution
Center (PDC). If fuses are OK, check wiring cir-
cuit. Refer to Group 8W, Wiring Diagrams.
(4) Check Pin 5, with switch in the ON position
there should be battery voltage and no voltage in the
OFF position.
(a) If OK, go to Step 5.
(b) If NOT OK, no voltage in the ON position or
voltage in the OFF position. Replace the switch/re-
lay module.
(5) Press switch to ON position. The indicator
lamp should come on and remain on for approxi-
mately 10 minutes. If the indicator lamp fails to light
or no voltage is present for approximately 10 min-
utes. Replace Rear Window Defogger Switch.
(6) To bench test relay:
(a) Using a jumper wire connect a 12 volt batter
supply, apply voltage to Pin 3 and 4. Ground Pin 2.
(b) Follow the above procedures except Step 2
Fig. 1 Systems Electrical Circuit
PLELECTRICALLY HEATED SYSTEMS 8N - 1