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GENERAL INFORMATION
INTRODUCTION
. . . . . . . . . . . . . . . . . . . . . . . . 1
DESCRIPTION AND OPERATION
INTERFERENCE ELIMINATION . . . . . . . . . . . . . 1
POWER ANTENNA
REMOTE AMPLIFIER . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
AUDIO DIAGNOSTIC TEST PROCEDURES . . . . 2
DIAGNOSTIC CONDITIONS . . . . . . . . . . . . . . . . 2
MANUAL ANTENNA . . . . . . . . . . . . . . . . . . . . . 13
GENERAL INFORMATION
INTRODUCTION
For operation of the factory installed standard and
optional radios with cassette or compact disc player,
refer to the Sound Systems Operating Instructions in
the Owners Manual supplied with the vehicle.
The vehicles are shipped with fuse 5 removed from
the Junction Block. The fuse replaces the ignition-off
draw (IOD) connector. Fuse 5 is a ten amp fuse.
When removed it prevents the battery from discharg-
ing during storage. For specific wiring and location,
refer to Group 8W, Wiring Diagrams.
DESCRIPTION AND OPERATION
INTERFERENCE ELIMINATION
Some components used on the vehicles are
equipped with a capacitor to suppress radio fre-
quency interference/static.
Capacitors are mounted in various locations inter-
nal to the generator, instrument cluster and wind-
shield wiper motor.
A ground strap is mounted from the engine to
shock tower. On four cylinder engines, there is a
ground strap from the rear of the muffler to the muf-
fler mounting bracket. These ground circuits should
be securely tightened to assure good metal to metal
contact. Ground straps conduct very small high fre-
quency electrical signals to ground and require clean
large surface area contact. The radio grounds to the
cross car beam through pinch brackets that grounds
automatically as the radio is installed into the
instrument panel.
Radio resistance type spark plug cables in the high
tension circuit of the ignition system complete the
AUDIO SYSTEMS
. . . . . . . . . . . . . . . . . . . . . . 1
CONTENTS
page
POWER ANTENNA . . . . . . . . . . . . . . . . . . . . . . 13
DOOR MOUNTED SPEAKER . . . . . . . . . . . . . . 14
INSTRUMENT PANEL SPEAKER . . . . . . . . . . . 14
MANUAL ANTENNA AND MAST . . . . . . . . . . . . 14
POWER ANTENNA . . . . . . . . . . . . . . . . . . . . . . 15
RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
REAR SPEAKER . . . . . . . . . . . . . . . . . . . . . . . 16
REMOTE AMPLIFIER . . . . . . . . . . . . . . . . . . . . 16
interference suppression. Faulty or deteriorated
spark plug wires should be replaced.
POWER ANTENNA
The power operated radio antenna is a telescoping
type antenna, extended and retracted by a reversible
electric motor.
The Automatic Power Antenna is controlled by a
combination of an internal relay and limit switches
which, are built into the antenna motor housing.
This antenna is actuated when the radio is switched
ON and the ignition switch in ON or ACCESSORY
position. When the ignition switch or the radio is
turned OFF the antenna mast should retract fully.
Many antenna problems may be avoided by fre-
quent cleaning of the antenna mast telescoping sec-
tions. Clean the antenna mast sections with a clean
soft cloth.
Before an antenna is removed, the antenna perfor-
mance should be tested to decide if it is a reception
problem or an operational problem.
Whenever a operational malfunction occurs, first
verify that the radio antenna wire harness is prop-
erly connected. Check all connectors before starting
normal diagnosis and repair procedures.
REMOTE AMPLIFIER
The amplifier is located under the right front seat.
When the radio system is ON, and all or some
speakers are not operating or have a noise distortion
refer to the diagnostic tests. Refer to Group 8W, Wir-
ing Diagrams for Pin numbers and location.
AUDIO SYSTEMS
8F - 1
. . . . . . . . . . . . . . . . 15
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