1993 DODGE TRUCK Service Repair Manual

8F
- 6
AUDIO
SYSTEMS

•
(7) Route cable through retainer clip, over to radio,
and plug into back of radio. (8) Close glove box.
(9) Connect negative cable to battery.

CASSETTE
TAPE
PLAYER
DIAGNOSIS
TAPE
PLAYER DIAGNOSIS
Turn Radio On & Insert Tape
Tape
Inoperative

Check
Player
For Obstruction
Behind
Doors
Poor

Performance

1

Try
A
Good
Known

Tape
Yes

Try
A
Known

Good
Tape Correct As
Required
Yes

Advise
Owner of Worn
or

Defective
Tape
Yes

Remove
Unit For Repair
Advise
Owner
of Worn
or

Defective
Tape
NO
EJECT

Do
Not Force Removal
of Jammed Cassette
J928F-5

•

AUDIO
SYSTEMS
8F - 7
SERVICE
PROCEDURES

RADIO
REPLACEMENT

REMOVAL
(1) Disconnect negative cable from battery.

CAUTION:
Map
lamp
must
be
removed
to
prevent

damage
to instrument panel.
(2) Remove 2 screws and the map lamp (if
equipped) (Fig. 9). (3) Remove 6 screws attaching I/P bezel to the in­
strument panel. Be sure the screw below the Heat-
er/C control is removed.

CLUSTER
BEZEL
J938E-51
Fig.
9 Instrument
Cluster
Bezel

(4) Remove 2 mounting screws from front of radio
(Fig. 10).
(5) Pull radio out of instrument panel and discon­
nect wiring and antenna.

(6)
Remove screw from ground strap.
RF431

Fig.
10 Radio to Instrument
Panel
Mounting
INSTALLATION

(1) Install ground strap.
(2) Install wiring and antenna. (3) Insert radio into panel and install mounting
screws.
(4) Install instrument cluster bezel.
(5)
Install map lamp, if equipped.
(6) Connect negative cable to battery.

DOOR
MOUNTED
SPEAKER

REMOVAL
(1) Remove remote control handle.
(2) Remove window regulator handle, if equipped.
(3) Remove pull strap if equipped.
(4) Remove screw at top of armrest.

(5)
Using a trim stick or other suitable flat tool,
gently pry trim panel away from door.
(6) Remove screws holding speaker (Fig. 11).
(7) Disconnect speaker leads.
(8) Remove speaker.
Fig.
11
Door
Mounted
Speaker

INSTALLATION

(1) Connect leads to speaker.
(2) Position speaker into place, install mounting
screws and tighten securely.
(3) Install door trim panel.

REAR
SPEAKER
-
STANDARD
CAB PICKUP

REMOVAL
(1) Remove grille and speaker assembly to pillar
mounting screws (Fig. 12). (2) Pull speaker and grille away from pillar and
disconnect wiring.
(3) Remove speaker to grille retaining nuts (2).

INSTALLATION
(1) Position speaker onto studs of speaker grille
and install nuts.
(2) Install wiring harness connector on speaker.
(3) Position speaker and grille on pillar and install
mounting screws.

•

Fig.
12 Rear
Speakers

REAR
SPEAKER
-
CLUB CAB PICKUP
REMOVAL
(1) Remove two screws from bottom of speaker
housing (Fig. 13). (2) Lower speaker housing and pull bottom out, al­
lowing retaining tab on top of housing to clear slot. (3) Disconnect speaker connector and remove
speaker.

INSTALLATION
(1) Install wiring harness connector on speaker.
(2) Install retaining tab into clip.
(3) Install screws on the bottom of the speaker
housing.
Fig.
13
Club
Cap
Speaker
Installation

REAR
SPEAKER
-
RAMCHARGER
(1) Remove screws holding the speaker and grille
assembly to the mounting plate (Fig. 14).

SPEAKER
MOUNTING

GRILLE
ASSEMBLY
J908F-12

Fig.
14
Ramcharger
Rear
Speaker
(2) Disconnect speaker connector and remove
speaker.
(3) Remove screws holding speaker to grille and
remove speaker.
(4) To install the speaker and grille assembly, re­
verse the removal procedures.

•

HORNS
8G - 1
HORNS
CONTENTS

SERVICE
PROCEDURES
page

.. 3
TEST PROCEDURES
page

.. 1

GENERAL
INFORMATION plied from the fuse block and grounded in the horn The horn system consists of a horn switch, horn re- switch. When the horn switch on the steering column
lay (located on the fuse block), horns, and all their is pressed, the ground circuit is completed, energiz-
wiring and connections. The circuit voltage is sup- ing the relay, and supplying power to the horns.

TEST PROCEDURES
HORNS
WILL
NOT
SOUND
If the horns do not sound, check for a blown horn
fuse in cavity number 4 of the fuse block. If the fuse is blown, replace it with the same type fuse. If the
horns fail to sound and the newly replaced fuse blows
the horn switch is depressed, check for one of the fol­ lowing:
• a short circuit in the horn
• the horn wiring between the fuse terminal and the
horn is faulty. If the fuse is intact, unplug wire connector at horn.
Connect one lead of a test lamp to the wire connector and the other lead to a good body ground (Fig. 1).
Depress the horn switch. Should test lamp illuminate
the horn is ungrounded or faulty. Ground can be checked by using a jumper wire between horn
bracket (scratch through paint) and the battery neg­ ative terminal. If the horn still fails to sound with
the ground jumper wire still intact and the horn re­ connected, replace the horn. If the lamp fails to illuminate, check for a defective
horn relay by substituting a known good horn relay in the circuit. If the lamp illuminates when depress­
ing the horn switch, the original relay is defective. If
the lamp fails to illuminate with a known good relay, unplug that relay. Connect a jumper wire from the
battery terminal to the horn terminal on the relay
terminal board. If the lamp, connected in place of the
horns, fails to illuminate, inspect for an open circuit
between the horn fuse and the horn terminal on the relay. Also check between relay terminal board and
the horn terminals. Should the lamp illuminate, a defective horn switch or an open circuit in the wiring
between the relay terminal and the horn switch is at fault.

HORNS SOUND CONTINUOUSLY
Should the horns sound continuously, unplug the
horn relay from the relay connector inside the pas-
HORN
TEST LAMP TO RELAY
AND

HORN
BUTTON
-

TO GOOD BODY GROUND HORN,
CONNECTOR
PR714

Fig.
1 Testing for Voltage
senger compartment (Fig. 2). Plug in a known good
relay. If the horns stop blowing, relay is defective and must be replaced. Should the horns still sound,
proceed with Horn Diagnosis Chart.
HORN RELAY
FUSE BLOCK

RB1359

Fig.
2
Horn
Relay
Remove steering wheel pad and disconnect wire
from horn switch. Repeat the above test and if the
test lamp still illuminates, wire is shorted and should be repaired. If test lamp does not illuminate,
horn switch is defective and must be replaced.

8G
- 2
HORNS
•
HORN
DOES NOT
SOUND HORN SOUNDS
INTERMITTENTLY

TEST FUSE
HORN SOUNDS
CONTINUOUSLY

HORN SWITCH
OR
WIRE TO HORN SWITCH GROUNDING
OUT

FUSE BLOWN
REMOVE
HORN
PAD AND

CHECK
CONTINUITY
BE­

TWEEN STEERING SHAFT AND BODY GROUND
NOTE:
IMMEDIA1

RELAY
AND
Dl
FRO/V
rELY UNPLUG HORN

SCONNECT
WIRES

\HORNS

USE
TEST LIGHT BETWEEN HORN
RELAY
SOCKETS
t AND 3
(SEE
INSET DIAGRAM)

HORN CIRCUIT
WIRING SHORTED TO GROUND

USE
TEST
LIGHT
AT

HORNS
(DEPRESS
HORN
BUTTON)
(FIG.
2)
TEST LIGHT' ON
TEST
UGHT
"OFF" TEST LIGHT "OFF"

INTERNAL
SHORT CIRCUIT IN HORN
HORN
NOT*
GROUNDED

REPLACE
HORN
RELAY
WITH
A

KNOWN GOOD
ONE
(FIG.
3)
TEST LIGHT "ON"

FAULTY
HORN RELAY

SHORTED

HORN RELAY WIRE
TO
HORN
BUTTON SWITCH
GROUNDED
OR
HORN BUTTON SWITCH
GROUNDED

REFER
TO
TEST
PROCEDURES

FAULTY HORN WRONG

FUSE
SIZE

TEST LIGHT "ON"

FAULTY ORIGINAL
RELAY
TEST LIGI

HT
"OFF"

UNPLUG REPLACEMENT

RELAY
FROM SOCKET
AND
CONNECT
A
JUMPER
WIRE BETWEEN RELAY
SOCKET
1
AND
2

SEE
INSET DIAGRAM

INSPECT
FOR
OPEN
CIRCUIT
IN
WIRING FROM
FUSE
BLOCK THROUGH

RELAY
BOARD
TO
HORN TERMINAL FAULTY HORN SWITCH

OR
WIRING BETWEEN
RELAY
TERMINAL
AND
HORN SWITCH
HORN
RELAY CONNECTOR ALL MODELS
TO HORN SWITCH

TO

HORNS
TO
FUSE

BLOCK
*IT
IS
IMPORTANT
THAT
HORNS

BE
ADEQUATELY GROUNDED. GROUNDING

CAN
BE
VERIFIED
BY
MAKING
A

TEMPORARY
JUMPER WIRE CONNECTION BETWEEN HORN BRACKET (SCRATCH
THROUGH
PAINT)
AND THE
BATTERY
NEGATIVE TERMINAL.
J918G-5

•

HORNS
8G - 3
SERVICE
PROCEDURES

HORN
SWITCH (HORN PAD ASSEMBLY)

REPLACEMENT

REMOVAL (1) From underside of steering wheel, remove horn
pad mounting screws (Figs. 3 and 4). (2) Pull pad up from wheel and disconnect electri­
cal leads. (3) Remove pad.

INSTALLATION
(1) Connect electrical leads to switch terminal on
horn pad. (2) Position pad into place on steering wheel, install
mounting screws and tighten to 1.5 N*m (15 in. lbs.).
NUT
&

WASHER
SOURCE

FOR HORN
RELAY GROUND STEERING
WHEEL
STEERING SHAFT
COVER

(WITHOUT
SPEED

CONTROL
SWITCHES) HORN
RELAY
GROUND WIRE COVER
RETAINING
SCREW
J9119-9

Fig.
3 Standard Steering
Wheel

HORN
PAD
COLUMN
HORN

LEADS
STEERING WHEEL
J9219-55

Fig.
4 Optional Steering
Wheel

HORN
REPLACEMENT
-
GAS ENGINE
The horns are located on either side of the radiator
support (Fig. 5). (1) Raise the hood.
(2) Disconnect the horn electrical connector.
(3) Remove bolt holding the horn bracket to the ra­
diator support and remove the horn. (4) To install the horns reverse the removal proce­

dures.
Tighten the bolts to 200 in. lbs.
HORN

(HI-NOTE)

HORN

(LOW-NOTE)

HORN

MOUNTING

BOLTS

J908G-10

Fig.
5
Horn
Removal
and Installation—Gas
Engine
HORN
REPLACEMENT
-
DIESEL ENGINE

The horns are located on the inside of the left front
fender behind the battery (Fig. 6). (1) Raise the hood.
(2) Remove screw and washer holding the horn
bracket to the fender. (3) Lower the horn and bracket toward the rear of
the battery. (4) Disconnect the horn electrical connector.
(5) Remove the horn and bracket assembly by
working it under the battery tray brace (Fig. 6). (6) To install the horns reverse the removal proce­

dures.
LEFT

FENDER
HI NOTE
HORN
&
BRACKET
ASSEMBLY
LOW NOTE
HORN
&
BRACKET
ASSEMBLY
J908G-11

Fig.
6
Horn
Removal
and Installation—Diesel
Engine

•

VEHICLE SPEED CONTROL SYSTEM
8H - 1
VEHICLE SPEED CONTROL SYSTEM
CONTENTS

SERVICE
PROCEDURES
page

. 11
TEST PROCEDURES
page

.. 7

GENERAL
INFORMATION
The vehicle speed control system (Figs. 1, and 2) is
electrically actuated and vacuum operated. The elec­
tronic control is integrated into the Powertrain Con­ trol Module (PCM). The PCM is located next to the
battery. The controls are located on the steering
wheel and consist of the ON/OFF, RESUME/ACCEL and SET/DECEL buttons. The system is designed to
operate at speeds between 35 mph (50 km/h) and 85
mph (142 km/h).
WARNING: THE USE OF VEHICLE SPEED CON­
TROL IS NOT RECOMMENDED WHEN DRIVING CONDITIONS DO NOT PERMIT MAINTAINING A CONSTANT SPEED, SUCH AS IN HEAVY TRAFFIC
OR ON ROADS THAT ARE WINDING, ICY, SNOW
COVERED, OR SLIPPERY.
CABLE
BRACKET
TO ACTIVATE: By pushing the ON/OFF button
to the depressed latched position, ON, the speed con­
trol function is now ready for use.
TO DEACTIVATE: A soft tap of the brake pedal,
normal brake use or clutch pedal use while the sys­
tem is engaged will disengage speed control without
erasing memory. A sudden increase in engine R.P.M.
may be experienced if the clutch pedal is depressed
while the speed control system is engaged. Pushing
the ON/OFF button to the unlatched position or
turning off the ignition erases the memory.
TO SET SPEED: When the vehicle has reached
the desired speed push the SET/DECEL button to en­ gage system which will then automatically maintain
the desired speed. TO DECELERATE: When speed control is en­
gaged, holding the SET/DECEL button depressed al­
lows the vehicle to coast to a lower speed setting.
SPEED
CONTROL

SERVO
AND BRACKET

SPEED

CONTROL
CABLE

»CABLE
VIEW
IN
DIRECTION RRAfKFT
OF ARROW
Z BRACKET J928H-16

Fig.
1
Speed
Control System—3.9L/5.2L/5.9L Gas Engine—Typical