radio antenna DODGE TRUCK 1993 Service Repair Manual

AUDIO SYSTEMS
CONTENTS

SERVICE
PROCEDURES
page

.. 7
TEST PROCEDURES
page

.. 2

GENERAL
INFORMATION
For operation of the factory installed radios, refer
to the Owner Manual supplied with the vehicle. When connecting or disconnecting the Ignition Off
Draw (IOD) connector, it is important that the igni­
tion switch be in the OFF position. Failure to place the ignition switch in the OFF po­
sition can cause the radio display to become scram­
bled when the IOD is disconnected. Connecting the IOD will correct the scrambled display.

INTERFERENCE
ELIMINATION
Many components are used on vehicles equipped
with a radio to suppress radio frequency interference (static). A capacitor is mounted inside the generator and
ground straps are utilized from cab to box and from
the engine to cowl. The previously mentioned Capacitor and Ground
Straps should be securely mounted to a clean ground
surface to work effectively. Radio resistance spark plug wires complete the in­
terference suppression system. Faulty or deteriorated spark plug wires should be replaced.
RADIO NOISE DIAGNOSIS

Noise,
Static
Hash,
Etc.

Check
For Noise in
the
Following
Positions:

1.
Accessory (All Electrical
Accessories
Off)

2. Engine Running
Is

'Static/NoiseS

Present
'With
Ign.
Key in Acc.
Yes\^|j
Accessories/
Off

No

Refer
to

Antenna

Diagnosis


f

Stop
No

Is
Static/Noise Present
With Engine
Running?.
Yes

J928F-3
Check
Following:

A.
Electric
Fuel
Pump
B.
Ignition
System
Faults

C.
Faulty Ground Connections
D.
Faulty Electronic Voltage Reg.

E.
Tighten Antenna Mounting Nut

SPEAKER DIAGNOSIS
Turn Ign. Key to
ACC.

X
Select Known Station
Volume
at
Listening Level
Adjust Speaker Control (Fader & Balance) to Check
if
All
Spkrs.
Am Distorted or Inoperative
y r y
r

Any
One Channel
Right
or
Left
Only One
Speaker
1 r
Replace
Radio
Check
Defective
Spkr.
Connection, Wiring
at

Sack
of
Radio or Amp
Check
Defective
Spkr.
Connection, Wiring
at

Sack
of
Radio or Amp All
Speakers Without
Sound?,
Yes

Check Ign. Feed
at Radio
Repair as Required Repair as
Required

Yes Yes

Check
for

Short Circuit To Ground
No.

Replace
Speaker
Yes
Check
for
Short

To
Ground
on
Any/ All Speaker
Leaas
Stop

Yes
Replace

Radio

No
Send
Original

Radio

for Service

J928F-10

ANTENNA
TESTING
Antenna performance may be tested by substitut­
ing a known good antenna. Check short or open cir­
cuits with an ohmmeter or continuity light once the antenna cable is disconnected from the radio as fol­
lows:
(1) Continuity should be observed between the tip
of the mast and radio end pin (Fig. 1).
(2)
No continuity or a very high resistance of sev­
eral megohms should be observed between the
ground shell of the connector and radio end pin.

(3)
Continuity should be observed between the
ground shell of the connector and the mounting hard­
ware on the fender.

BENCH
TEST
FOR
ANTENNA
MALFUNCTION
(1) With test lamp and battery in circuit; (a) attach one test lead to concentric pin on
lead-in connector

8F - 4
AUDIO SYSTEMS

• ANTENNA DIAGNOSIS

Turn Ign. Key
to
ACC

Tune
to
Known
Strong AM
Station

f

Check
Antenna Connections

1
1

No
Check
for

Reception Using
A
Test Antenna Repair as

Required*

*Be
Sure
Antenna
is

Properly
Grounded
to
Car.
(Poor
Grounding
of
Antenna

May
Cause
Engine Noise
or

Yes
Static Especially on AM)
Remove
Radio

For
Service
Replace
or
Repair

Defective
Antenna
Or
Lead
in
J928F-4

TIP
OF
MAST
TEST
POINT

RY684

Fig. 1 Antenna Test Points
(b) other test lead to tip of mast (Fig. 2).
The lamp should light indicating Continuity. (2) Keeping one lead on connector pin, clip other
lead on antenna body assembly. The lamp should
-TIP
OF
MAST

•
RADIO LEAD
IN
PR519

Fig.
2 Antenna Bench Test
Points

NOT light. If it does, look for a short circuit in the
body or in the cable probably at the connector.
(3) Remove clip lead from connector pin and clip
on outer shell of connector. Connect other clip lead to
antenna body assembly. The lamp should LIGHT
again. If it does not Light, antenna shielding has an
open circuit.
Wiggle cable over its entire length to reveal in­
termittent short or open circuits during steps 1,
2 and 3.

REMOVAL
(1) Disconnect negative cable from battery.
(2) Open glove box door. Depress 2 "stops" on glove
box at center upper area near latch (Fig. 3).

INSTRUMENT
PANEL
DEPRESS

TABS

GLOVE BOX
GLOVE
BOX
DOOR
J928E-51

Fig.
3
Glove
Box
"Stops"

(3) Reach behind instrument panel and unplug an­
tenna cable from radio (Fig. 4).
(4) Working through the glove box opening, pull
antenna cable from retainer clip (Fig. 5).
(5) Open right door and remove cable grommet
from A pillar (Fig. 6). (6) Pull cable from A pillar. (7) Loosen antenna mast from antenna body. Do
not remove at this time.
(8) Loosen cap nut using tool C4816 (Fig. 7).

•

AUDIO
SYSTEMS
8F - 5

RN1005

Fig.
4
Unplugging
Antenna
Lead
from Radio
Fig.
5
Removing
Antenna
Cable

Fig.
6
Removing
Grommet

(9) While holding antenna mast with one hand, re­
move cap nut with other hand.
(10) Lower antenna assembly down far enough to
gain access to antenna body (Fig. 8).
(11) While holding body remove antenna mast.
(12) Pull antenna body and cable assembly from
fender area and remove. (13) Remove adapter on fender.
ADAPTER
PR517 A

Fig.
7 Cap Nut and Adapter
Fig.
8
Removing
or Installing
Antenna
Body

INSTALLATION
(1) Route antenna cable between fender and dash
panel to A pillar area. (2) Insert antenna mast through hole in fender and
screw into antenna body.
(3) Pull assembly up and position into place and
hold. (4) Install adapter making sure tab indexes with
opening in fender and antenna body.
(5) Install cap nut and tighten securely with tool
C-4816. (6) Insert cable through opening in A pillar and
from inside glove box opening pull in far enough to snap grommet into place.

•

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.