1993 DODGE TRUCK ignition

8L
- 2
LAMPS

• This switch is mounted to the left hand side of the
steering column. Should any function of the switch

fail,
the entire switch must be replaced.

SWITCH
TEST
(1) Disconnect battery negative cable.
(2) Remove tilt lever.
(3) Remove upper and lower column covers to gain
access to the switch connector (Fig. 1).
(4) Remove lower fixed column cover.
(5) Loosen steering column upper bracket nuts. Do
not remove nuts.
(6) Move upper fixed column cover to gain access
to rear of multi-function switch.
(7) Remove switch connector (Figs. 2 and 3). (8) Use an ohmmeter to test for continuity. Check
between the terminals of the switch as shown in the continuity chart (Fig. 4).
(9) Refer to Service Procedures for assembly.
UPPER SHROUD GROUND
CLIP UPPER
FIXED SHROUD
SUPPORT BRACKET
LOWER
SHROUD LOWER
FIXED
SHROUD
J9119-22

Fig.
1 Steering
Column
Covers
STEERING

COLUMN
ASSY.

J918J-1
TURN
SIGNAL

MULT
I
SWITCH
AND
*® FUNCTION
LEVER
SWITCH

CONNECTOR

Fig.
2 Multi-function
Switch
Connector

KEY-IN
SWITCH
&
HALO
LIGHT
MULTIFUNCTION

SWITCH

IGNITION
SWITCH
TURN
SIGNAL

SWITCH
&
LEVER

SPEED

CONTROL
J918J-2

Fig.
3 Steering
Column
Connectors

24 23 22 21 20 19 18

EZJ
C=3 C=3 E=3
CZZJ
E=3 E=3
17 16 15 14 13 12 11 10
a a a 8=3 ( ( ) ) 1=3 1=3 1=3 9 8 7 6 \5_y4 3 2 1
VIEW
FROM
TERMINAL
SIDE

SWITCH POSITION CONTINUITY BETWEEN

LOW
BEAM

HIGH
BEAM

OPTICAL
HORN
18 AND 19
19 AND 20
20
AND
21

908J-5
Fig.
4
Beam
Select
Switch
Continuity Chart

8L
- 8
LAMPS

CONNECTOR

CUP
FRONT

LAMP
ASSEMBLY
LICENSE
PLATE

SCREW
LAMP
ASSEMBLY

LICENSE
PLATE

RR8LD24

Fig.
15
License
Plate
Lamps
-
Step
Bumper
TO
TAIL,
STOP,

TURN
SIG. AND
BACK
UP
LAMPS

LICENSE
PLATE
LICENSE
PLATE
LAMP
AND

LAMP
CONNECTOR
BRACKET
ASSEMBLY
J908L-74

Fig.
16
License
Plate
Lamp
Without Rear
Bumper

UNDERHOOD
LAMP
When equipped, the underhood lamp is installed on
the hood left, rear inner panel (Fig, 17). The lamp is
illuminated when the hood is opened (Fig. 18). UNDERHOOD LAMP BULB REPLACEMENT

REMOVAL
(1) Disconnect the wire connector from the under­
hood lamp (Fig. 17).
(2) Rotate the bulb counter-clockwise. Remove it
from the lamp base socket (Fig. 18).

INSTALLATION
(1) Insert the replacement bulb in the lamp base
socket. Rotate it clockwise.
(2) Connect the wire connector to the lamp (Fig.

17).

UNDERHOOD LAMP REPLACEMENT

REMOVAL
(1) Disconnect the wire connector from the lamp
(Fig. 17). (2) Rotate the bulb counter-clockwise. Remove it
from the lamp base socket (Fig. 18). (3) Remove the screw that attaches the lamp re­
flector and support bracket to the hood inner panel (Fig. 17).
(4) Remove the lamp from the hood inner panel.
INSTALLATION (1) Position the underhood lamp on the hood inner
panel. (2) Install the screw through the lamp and into the
hood panel (Fig. 17). Tighten the screw securely. (3) Insert a replacement bulb in the lamp base
socket (Fig. 18). Rotate it clockwise. (4) Connect the wire connector to the lamp (Fig.

17).
HOOD

J9223-446

Fig.
17
Underhood
Lamp
DAYTIME
RUNNING
LIGHT
MODULE
(CANADA

ONLY)
The headlamps on vehicles sold in Canada will il­
luminate when the ignition is ON. The module also
receives a signal from the distance sensor. This pro-
SUPPORT

BRACKET RETAINER
LIQUID

TAB SWITCH
ENCLOSURE

WIRE
HARNESS
CONNECTOR

\
1

d1^—1—l
L/

CMD>

LAMP

REFLECTOR
BULB
(105)
BASE
J9281"1
Fig.
18
Underhood
Lamp
Components

•

LAMPS
8L - 11
BULB
APPLICATION

GENERAL
INFORMATION
The following Bulb Application Table lists
the

lamp title
on the
left side
of the
column
and
part
number
on the
right.

CAUTION:
Do not use
bulbs
that
have
a
higher
can­

dle power than
the
bulb
listed
in the
Bulb
Applica­

tion Table.
Damage
to
lamp
can
result.

EXTERIOR LAMPS
Auxiliary Turn Signal (Snow Plow) 2057
Auxiliary Headlamps (Snow Plow) .6054
Back-up....................... .......1156 Cargo Lamp..
922

Clearance Lamps
194

Front Side Marker
168

Headlamp/Sealed Beam .6052
License Plate
168
Park/Turn Signal 2057
TaiyStop/Turn Signal ...2057

INTERIOR LAMPS

DIMMER CONTROLLED LAMPS Service procedures
for
most
of the
lamps
in the in­

strument panel
are
located
in
Group
8E,
Instrument
Panel
and
Gauges. Some components have lamps
that
can
only
be
serviced
by an
Authorized Service Center (ASC). These components must
be
removed
from
the
vehicle
for
service. Contact local dealer
for
location
of
nearest
ASC.
A/C Heater Control
158

Ash Receiver
..158

Gear Shift Selector...........................................PC194
Heater Control
158

Instrument Cluster.. PC 194
Radio
ASC
Snow Plow Control
.158

INDICATOR LAMPS Service procedures
for
most
of the
lamps
in the in­

strument panel,
and
switches
are
located
in
Group

8E,
Instrument Panel
and
Gauges. Anti-lock Brake PC194
Brake Warning PC194 Check Engine PC194
Engine
Oil
Pressure
158

Fasten Seat Belts.. PC 194 Four Wheel Drive ....158
Hazard Flasher
194

High Beam PC194
Low Fuel....... JPC194
Maintenance Required PC 194
Transmission Temperature ..PC 194 Turn Signal PC194
NON-DIMMING LAMPS Service procedures
for
most
of the
lamps
in the
fol­
lowing list
can be
found
in
Group
23,
Body.
Dome
1004

Engine Compartment ...105 Glove Compartment....
1891

Ignition Lock
ASC

Reading Lamp
912

•

REAR
WINDOW DEFOGGER
8N - 1
REAR
WINDOW
DEFOGGER

CONTENTS
page

REPAIR
PROCEDURES (GRID LINES,
TERMINALS,
AND
PIGTAILS)
3

GENERAL
INFORMATION
The electrically heated rear window defogger
is

available
on
Ramcharger with sunscreen glass only. The system consists
of a
rear window with
two
ver­
tical
bus
bars
and a
series
of
electrically connected
grid lines baked
on the
inside surface. Circuit protection
for the
heated grid circuit
is
pro­
vided
by a 18
gauge fusible link wire located
in the

engine compartment.
The
relay circuit
is
protected
by
a 20 amp
fuse, located
in the
fuse block. When
the
rear window defogger switch
is
placed
in

the
ON
position, current
is
directed
to
rear window
grid lines.
The
heated grid lines
in
turn heat
the

rear window
to
clear
the
surface
of fog or
snow.

CAUTION;
Grid lines
can be
damaged
or
scraped
off
with
sharp instruments. Care should
be
taken
in
page

SERVICE
PROCEDURES
4

TEST
PROCEDURES
1

cleaning
the
glass
or
removing foreign materials,

decals
or
stickers. Normal
glass
cleaning solvents
or
hot
water
used
with
rags
or
toweling
is
recom­ mended.

SYSTEM
DESCRIPTION CONTROL
SWITCH/TIMER
RELAY MODULE
The control switch
and
timer relay
are
integrated
into
a
single panel mounted assembly. Actuating
the
switch energizes
the
electronic timing circuit. This
allows current
to
flow through
the
grid system
for

approximately
10
minutes,
or
until either
the
control
switch
or
ignition
is
turned
off. An
indicating lamp
illuminates
a
lens inlaid
in the
control switch.

TEST PROCEDURES

SYSTEM
TEST
Electrically heated rear window defogger operation
can
be
checked in-vehicle
in the
following manner: (1) Turn
the
ignition
ON.

(2) Turn rear window defogger control switch
ON.

(3) Monitor vehicle voltmeter. With
the
control
switch
ON, a
distinct needle deflection should
be

noted. (4)
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 3 to 4
minutes
of
oper­ation. (5) Contact negative lead
of a DC
voltmeter
(Fig.

1),
to
terminal
"B"
(passenger side). Contact positive
lead
to
terminal
"A"
(driver side).
The
voltmeter
should read
10-14
volts. Only steps
(3) and (4) or (5)
above will confirm sys­
tem operation. Indicator light illumination means
that there
is
power available
at the
output
of the re­
lay only,
and
does
not
verify system operation.
If rear window defogger does
not
operate,
the
prob­
lem should
be
isolated
in the
following manner:
(1) Confirm that ignition switch
is ON.
VOLTMETER

Fig.
1
Grid
Line
Test (2) Ensure that heated rear window feed wire
is

connected
to
terminal
or
pigtail
and
that ground wire
is
in
fact grounded.
(3) Ensure that fuse
is
operational
and all
electri­
cal connections
are
secure.
When above steps have been completed
and the

system
is
still inoperative,
one or
more
of the
follow­
ing
is
defective:
(a) Control switch/timer relay module.

8N
- 2
REAR WINDOW DEFOGGER

• (b) Rear window grid lines (all grid lines would
have to be broken) or one of the feed wires are not
connected for the system to be inoperative.
The following paragraphs outline component check­
out procedures.
If turning the switch ON produces severe voltmeter
deflection, the circuit should be closely checked for a shorting condition. If system operation has been verified but indicator
bulb does not light, check and replace bulb.
For detailed wiring information, refer to Group 8W
- Wiring Diagrams.

REAR
WINDOW GRID LINES TEST
Horizontal grid lines and vertical bus bar lines
printed and baked on inside surface of rear window glass (Fig. 1) comprise an electrical parallel circuit.
The electrically conductive lines are made of a silver- ceramic material. When baked onto glass they be­
come bonded to the glass and are highly resistant to abrasion. It is possible, however, that a break may
exist or occur in an individual grid line resulting in
no current flow through the line. To detect breaks in
grid lines, the following procedure is required: (1) Turn ignition on and push control switch to
ON. Indicator light should come on. (2) Contact negative lead of a DC voltmeter, to
vertical bus bar connecting grid lines on passenger side of vehicle (point A of Fig. 1). Contact positive
lead of voltmeter, to vertical bus bar on driver side of
vehicle (point B of Fig. 1). Voltmeter should read 10-14 volts. (3) With negative lead of voltmeter, contact a good
body ground point. Voltage reading should not change. A different reading indicates a poor ground connection. (4) Connect negative lead of voltmeter to Point A
on passenger side bus bar and touch each grid line at
Mid-Point with positive lead. A reading of approxi­ mately 6 volts indicates a line is good. A reading of 0
volts indicates a break in line between Mid-Point C and Point B. A reading of 10-14 volts indicates a
break between Mid-Point C and ground Point A. Move toward break and voltage will change as soon as break is crossed.

CONTROL SWITCH/TIMER MODULE TEST
Control switch/timer relay module may be tested
in-vehicle or bench tested. In vehicle testing is ac­
complished in the following manner: (1) Remove switch from instrument panel (refer to
Control Switch Replacement) and leave switch con­
nector plugged in. (2) Turn ignition ON.
(3) Using a DC voltmeter, check voltage at termi­ nals B, I and L (Figs. 2 and 3). Terminals B and I
should confirm a voltage of 10 to 14 volts to ground.
Terminal L should confirm 0 volts to ground. When terminals B and I show no voltage, trace circuit up­
stream of switch/relay module for cause:
• wiring cut
• fusible link faulty
• circuit breaker inoperative
• bulkhead connection bad, etc. If terminal L indicates voltage, place switch in
OFF position. If voltage at L is still indicated or in­
dicator lamp remains on, switch/relay module should
be replaced.
"XI
FUSE
#14
rr~
P 3
AAAP
P
FUSE
#3
20
AAAP
BATTERY

HEATED
REAR

WINDOW
DEFOGGER
SWITCH

(INSTRUMENT
PANEL)

ON/OFF
ILLUMINATION
LAMP

fez TIMER
L.E.I
INDICATOR
LIGHT
-©-
18
GAUGE

FUSIBLE
LINK

IGNITION POWER
MIDPOINT
"C"

CONNECTOR (TYPICAL)
POINT
"A"
POINT
"B"
GROUND
CONNECTOR

REAR
WINDOW
GRID
LINE
STRUCTURE
Fig.
2
Systems
Electrical Circuit
J928N-5

(4) If the relay checks out to this point, momen­
tarily operate switch to ON position. The indicator lamp should come on and remain on for approxi­
mately 10 minutes. Terminal L should confirm volt­
age.
If the indicator lamp fails to light or voltage at
terminal L is not confirmed the switch/relay module should be replaced.
Bench checking of the relay may be accomplished
in the following manner. By following the in-vehicle
procedure except Step 2: With a DC power supply, apply 12 volts to terminal B and I and ground termi­
nal G.

e
,
REAR
WINDOW
DEFOGGER
8N
- 3

L
-
TO
BACK GLASS

B
-
HIGH
AMP
SUPPLY

I
-
IGNITION

G
-
GROUND
S
-
ILLUMINATION
LIGHT

RELAY-TIMER

SWITCH
ASSEMBLY
J908N-8
Fig.
3
Rear Window Defogger
Switch,
Timer,
Relay
Connector
REPAIR
PROCEDURES
(GRID LINES, TERMINALS* AND PIGTAILS)

The
repair
of
grid lines
or the
terminal
is
possible
using
the
MOPAR Repair
Kit
No. 4267922
or
equiv­ alent.

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 INTERNALLY,
INDUCE VOMITING; CALL
A
PHYSICIAN IMMEDI­
ATELY.
IF IN
CONTACT
WITH
EYES,
FLUSH
WITH
PLENTY
OF
WATER.
USE WITH
ADEQUATE VENTI­
LATION.
DO
NOT USE
NEAR FIRE
OR
FLAME.
CONTENTS CONTAIN
3%
FLAMMABLE SOLVENTS.
KEEP
OUT
OF
REACH
OF
CHILDREN.

(1) Mask repair area
so
conductive epoxy
can be

extended onto
the
line
or the bus bar
(Fig.
4).
(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.
4).
(5) Apply epoxy through slit
in
masking tape.
Overlap both ends
of the
break
by at
least
19mm

(0.75
in).

(6)
For a
terminal
or
pigtail replacement, mask
ad­

jacent areas
so
epoxy
can be
extended onto line
as
BREAK
GRID
LINE

MASKING TAPE PR1509A

Fig.
4
Grid
Line
Repair
(Typical)
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

400°F,
glass
may
fracture.

(9) Allow epoxy
to
cure
24
hours
at
room tempera­
ture
or use
heat
gun
with
a
260°-371°C (500°-700°F) range
for 15
minutes. Hold
gun
approximately 254mm
(10
inches) from repaired area.
(10) After conductive epoxy
is
properly cured
re­

move wedge from terminal
and
check
out
operation
of rear window defogger.
Do not
attach connectors
until curing
is
complete.

-
CHIME/BUZZER WARNING SYSTEMS
8U - 1

CHIME/BUZZER
WARNING SYSTEMS

CONTENTS
page

DIAGNOSIS

GENERAL
INFORMATION
page

1
KEY-IN SWITCH REPLACEMENT
3

1
OPERATION
1

GENERAL
INFORMATION
The buzzer module is located to the right of the
steering column (Fig. 1). The buzzer sounds an audi­
ble warning tone in any of the following conditions: • Vehicle lights are ON when the driver's door is
opened.
• The key is in the ignition and the driver's door is
open. • The ignition is switched ON and the driver's seat
belt is not buckled. Buzzer will quit after 4 to 8 sec­
onds.
In addition to the buzzer, a seat belt light in­
dicator turns on as a reminder to fasten seat belt.

BUZZER

MODULE

INTERMITTENT

WIPE MODULE

Fig, 1 Buzzer Module Location

OPERATION
Battery voltage for module operation is supplied to
two pins. Battery voltage is present at pin 7 at all
times (Figs. 2 and 3). Pin 1 receives voltage when
the ignition switch is turned ON.
SEA T BELT WARNING To sound the seat belt warning, the module needs:
• battery voltage at the ignition switch input (Pin 1)
• a ground at the seat belt switch.
• a ground at Pin 3 to activate the timer. This occurs when the seat belt switch is closed be­
cause the driver's seat belt is not buckled. The "fas­
ten belt" light will also turn on along with the
warning sound. KEY IN IGNITION
To sound the "key in ignition" alarm, the module

needs:

• the ignition key warning switch must be closed
• the driver's door jamb switch must be closed. These conditions ground pin 6 of the module. These
switches are closed when the driver's door is open
and the key is in the ignition.
LIGHTS ON To sound the "lights on" warning, the module

needs:

• the headlamp switch must be closed
*> the driver's door jamb switch must be closed. These conditions ground pin 6 of the module. These
switches are closed when the driver's door is open
and the headlamp switch is on.

DIAGNOSIS
If the buzzer unit does not operate as described,
check the two fuses for pins 1 and 7 (Figs. 2, 3 and 4) and replace as required. If the fuses are not defec­

tive,
perform the following tests to determine if the
problem is in the module or in the wiring. Using a flat blade screwdriver, release the locking plastic clip
while carefully pulling out the module. Plug in a known good module and check its operation. If the
problem is not corrected by replacing the module, re­ move the module and continue as follows:
VOLTAGE TESTS Ignition in run, measure between the following
pins and vehicle ground.
• Measure voltage at buzzer module connector pin 1.
Meter should read battery voltage. If not, repair open
to ignition switch.
Turn ignition off and remove key from igni­

tion.

• Measure voltage at buzzer module connector pin 7.
Meter should read battery voltage. If not, repair open
to fuse. Battery voltage is present at Pin 7 at all
times regardless of key position.

8U
- 2
CHIME/BUZZER
WARNING SYSTEMS
•
TERMINAL
7

TO
B
+
TERMINAL
6

TO DOOR SWITCH
KEY
IN
SWITCH
AND
HEADLAMP
ON
SWITCH
!cO=f
Mi c£K
*£h

• CZ3
EZZ3
EZI 1

TERMINAL
4

TO SEAT BELT
BUCKLE SWITCH TERMINAL
1

TO
IGNITION
SWITCH
TERMINAL
3

TO GROUND TERMINAL
2

TO SEAT BELT
WARNING
LIGHT
J928U-12

Fig.
2
Buzzer
Module
Connector
Terminal

Identification—Front
View

LIGHTS-ON/KEY-IN-IGNITION
WARNING
BATTERY
(+)
IS SI S K|
IGNITION
SEAT BELT
WARNING
LIGHT
GROUND SEAT BELT
SWITCH
J928U-9

Fig.
3
Buzzer
Module
Terminal
Identification—Front

View RESISTANCE TESTS

CAUTION:
Before making resistance measurements,

turn
ignition switch
OFF and
disconnect negative cable from
battery
to
avoid damaging ohmmeter.

Measure between the following pins and vehi­
cle ground.
• Buzzer module connector pin 2. Meter should read almost zero ohms (bulb filament). If not, replace seat
belt indicator bulb.
• Buzzer module connector pin 3. Meter should read
zero ohms. If not, repair open to ground. • Buzzer module connector pin 4. Drivers seat belt
not buckled. Meter should read zero ohms. If not, re­
pair open to ground (or buckle switch may be defec­
tive).
Meter should read open circuit if drivers seat
belt is buckled. If not, repair short to ground (or buckle switch may be defective).
• Buzzer module connector pin 6. Open driver's door,
key in ignition, (in OFF position). Meter should read
zero ohms. If not, repair open to ground.
• Buzzer/chime module connector pin 6. Open driv­
er's door, headlamp switch on, meter should read
zero ohms. If not, repair open to ground.
r—i
DOORSW

±
7
(SHOWN
DOOR
CLOSED)

rFY<;w M
UGHTS
SW

(SHOWN
KEW/
f(SHOWN^JGHTS
OFF)

#5 -^•^Y
BELT(I)

SW
LAMP
JL
SEAT
BELT
SW

/.
(SHOWN
-
BUCKLED)
IGN
SW

(SHOWN
IGN OFF)

PIN
VIEW
(SAME
AS
REAR
SIDE
[WIRE
SIDE]
CONNECTOR
VIEW)
X
=
Do Not Care

FUNCTION
DESCRIPTION

IGN.
SEAT

BELT
DRIVER'S

DOOR
KEY

HEAD

LAMPS

Seat
Belt
Reminder
4
to
8
Second

Tone and

Lamp
Output
^On

OP
Not
Bckld
X
X
X

Seat

Belt
Reminder
4
to
8
Second

Lamp
Output
Only
^On

OfP
Bckld

X X
X

Key
and
Head Lamp Reminder*
Continuous,

Steady
Tone
X
X
Open
In

X

Key
and
Head Lamp Reminder*
Continuous,

Steady
Tone
X
X
Open

X
On

*On
some
vehicles,
the key
switch
opens
when the ignition is switched on.
J928U-8

Fig.
4
Buzzer
Module
Schematic

o
o o o
4 3 2 1

WIRE
CAVITY APPLICATION
CONTINUITY

BETWEEN
1

2
Hdo
lamp

Halo
lamp
1
& 2
Almost
zero
ohms

(bulb
filament)

3
4
Key-in
warning switch

Key-in
warning switch
3
& 4
with
key in ignition
J918M-3

Fig.
5 Halo
Lamp
And
Key-In
Warning
Switch
Continuity Chart