Dodge Viper SRT-10 (ZB). Manual — part 56
(4) Disconnect antenna module cable and electrical
harness connector (Fig. 4).
(5) Remove
antenna
module
from
instrument
panel.
INSTALLATION
(1) Install antenna module cable to instrument
panel harness and secure.
(2) Connect antenna module cable to instrument
panel antenna cable.
(3) Connect antenna module electrical harness con-
nector.
(4) Place antenna module into position and install
mounting fasteners.
(5) Install instrument panel (Refer to 23 - BODY/
INSTRUMENT
PANEL/INSTRUMENT
PANEL
ASSEMBLY - INSTALLATION).
(6) Connect battery negative cable.
INSTRUMENT PANEL
ANTENNA CABLE
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the instrument panel (Refer to 23 -
BODY/INSTRUMENT
PANEL/INSTRUMENT
PANEL ASSEMBLY - REMOVAL).
(3) Disconnect the instrument panel cable from the
antenna module cable.
CAUTION: Pulling the antenna cable straight out of
the radio without pulling on the locking antenna
connector could damage the cable or radio.
(4) Disconnect the antenna cable by pulling the
locking antenna connector away from the radio (Fig.
5).
(5) Remove the antenna cable from the instrument
panel.
INSTALLATION
(1) Install antenna module cable to instrument
panel harness and secure.
(2) Connect instrument panel cable to antenna
module cable and to back of radio.
(3) Install instrument panel (Refer to 23 - BODY/
INSTRUMENT
PANEL/INSTRUMENT
PANEL
ASSEMBLY - INSTALLATION).
(4) Connect battery negative cable.
RADIO
DESCRIPTION
Available factory-installed radio receiver for this
model include:
• AM/FM/CD with 6 CD changer (RBQ sales code)
All factory-installed radio receivers can communi-
cate on the Programmable Communications Interface
(PCI) data bus network. All factory-installed receiv-
ers are stereo Electronically Tuned Radios (ETR) and
include an electronic digital clock function.
These radio receivers can only be serviced by an
authorized radio repair station. See the latest War-
ranty Policies and Procedures manual for a current
listing of authorized radio repair stations.
Fig. 4 ANTENNA MODULE CABLE
1 - ANTENNA MODULE ELECTRICAL CONNECTOR
2 - COAX CABLE
Fig. 5 ANTENNA TO RADIO
1 - RADIO
2 - LOCKING ANTENNA CONNECTOR
3 - INSTRUMENT PANEL ANTENNA CABLE
8A - 6
AUDIO/VIDEO
ZB
ANTENNA MODULE (Continued)
OPERATION
The radio receiver operates on ignition switched
battery current that is available only when the igni-
tion switch is in the On or Accessory positions. The
electronic digital clock function of the radio operates
on fused battery current supplied through a fuse in
the Power Distribution Center (PDC), regardless of
the ignition switch position.
For more information on the features, setting pro-
cedures, and control functions for each of the avail-
able factory-installed radio receivers, refer to the
owner’s manual.
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the center console bezel (Refer to 23 -
BODY/INTERIOR/CENTER
CONSOLE
BEZEL
-
REMOVAL).
(3) Remove the instrument panel center bezel
(Refer to 23 - BODY/INSTRUMENT PANEL/IN-
STRUMENT PANEL CENTER BEZEL - REMOVAL).
(4) Remove radio mounting screws (Fig. 6).
(5) Disconnect the electrical harness connectors.
CAUTION: Pulling the antenna cable straight out of
the radio without pulling on the locking antenna
connector could damage the cable or radio.
(6) Disconnect the antenna cable by pulling the
locking antenna connector away from the radio (Fig.
7).
INSTALLATION
(1) Connect the antenna cable to the radio.
(2) Connect the electrical harness connector to the
radio.
(3) Install the radio and the mounting fasteners.
(4) Install the instrument panel center bezel (Refer
to 23 - BODY/INSTRUMENT PANEL/INSTRUMENT
PANEL CENTER BEZEL - INSTALLATION).
(5) Install the center console bezel (Refer to 23 -
BODY/INTERIOR/CENTER
CONSOLE
BEZEL
-
INSTALLATION).
(6) Connect the battery negative cable.
RADIO NOISE SUPPRESSION
COMPONENTS
DESCRIPTION
Radio noise suppression devices are factory-in-
stalled standard equipment on this vehicle. Radio
Frequency Interference (RFI) and Electro Magnetic
Interference (EMI) can be produced by any on-board
or external source of electromagnetic energy. These
electromagnetic energy sources can radiate electro-
magnetic signals through the air, or conduct them
through the vehicle electrical system.
When the audio system converts RFI or EMI to an
audible acoustic wave form, it is referred to as radio
noise. This undesirable radio noise is generally man-
ifested in the form of “buzzing,” “hissing,” “popping,”
“clicking,” “crackling,” and/or “whirring” sounds. In
most cases, RFI and EMI radio noise can be sup-
pressed using a combination of vehicle and compo-
nent grounding, filtering and shielding techniques.
This vehicle is equipped with factory-installed radio
noise suppression devices that were designed to min-
imize exposure to typical sources of RFI and EMI;
thereby, minimizing radio noise complaints.
Fig. 6 RADIO
Fig. 7 ANTENNA TO RADIO
1 - RADIO
2 - LOCKING ANTENNA CONNECTOR
3 - INSTRUMENT PANEL ANTENNA CABLE
ZB
AUDIO/VIDEO
8A - 7
RADIO (Continued)
Factory-installed radio noise suppression is accom-
plished primarily through circuitry or devices that
are integral to the factory-installed radios, audio
power amplifiers and other on-board electrical com-
ponents such as generators, wiper motors, blower
motors, and fuel pumps that have been found to be
potential sources of RFI or EMI. External radio noise
suppression devices that are used on this vehicle to
control RFI or EMI, and can be serviced, include the
following:
• Underhood silencer to body ground strap -
This hood silencer has foil integral to it. At either
side near the hood hinge is a braided ground strap
that has an eyelet terminal connector crimped to
each end. The left side has two eyelets. Each ground
strap is fastened to the plenum area.
• Resistor-type spark plugs - This type of spark
plug has an internal resistor connected in series
between the spark plug terminal and the center elec-
trode to help reduce the production of electromag-
netic radiation that can result in radio noise.
OPERATION
There are two common strategies that can be used
to suppress Radio Frequency Interference (RFI) and
ElectroMagnetic Interference (EMI) radio noise. The
first suppression strategy involves preventing the
production of RFI and EMI electromagnetic signals
at their sources. The second suppression strategy
involves preventing the reception of RFI and EMI
electromagnetic signals by the audio system compo-
nents.
The use of braided ground straps in key locations
is part of the RFI and EMI prevention strategy.
These ground straps ensure adequate ground paths,
particularly for high current components such as
many of those found in the starting, charging, igni-
tion, engine control and transmission control sys-
tems. An insufficient ground path for any of these
high current components may result in radio noise
caused by induced voltages created as the high cur-
rent seeks alternative ground paths through compo-
nents or circuits intended for use by, or in close
proximity to the audio system components or circuits.
Preventing the reception of RFI and EMI is accom-
plished by ensuring that the audio system compo-
nents are correctly installed in the vehicle. Loose,
corroded or improperly soldered wire harness connec-
tions, improperly routed wiring and inadequate audio
system component grounding can all contribute to
the reception of RFI and EMI. A properly grounded
antenna body and radio chassis, as well as a shielded
antenna coaxial cable with clean and tight connec-
tions will each help reduce the potential for reception
of RFI and EMI.
REMOVAL
The underhood ground straps are integral to the
underhood silencer (Refer to 23 - BODY/HOOD/SI-
LENCER PAD - REMOVAL).
SPEAKER
DESCRIPTION
The speaker system features seven speakers in
seven locations. One 20 millimeter (.787 inch) diam-
eter speaker is located on each end of the instrument
panel top pad. One 160 millimeter (6.5 inch) speaker
is located in each front door. There is also one 70 mil-
limeter (2.5 inch) diameter speaker located behind
each headrest. Also included in this system is a 160
millimeter
(6.5
inch)
ported
subwoofer
located
between the passenger seats. The speaker system
includes a power amplifier mounted below the pas-
senger seat.
OPERATION
Two wires connected to each speaker, one feed cir-
cuit (+) and one return circuit (–), allow the audio
output signal electrical current to flow through the
voice coil. For complete circuit diagrams, refer to the
appropriate wiring information. The wiring informa-
tion includes wiring diagrams, proper wire and con-
nector repair procedures, details of wire harness
routing and retention, connector pin-out information
and location views for the various wire harness con-
nectors, splices and grounds.
DIAGNOSIS AND TESTING - SPEAKER
Any diagnosis of the Audio system should
begin with the use of a scan tool and the appro-
priate Diagnostic Service Manual.
Refer to the appropriate wiring information.
WARNING:
DISABLE
THE
AIRBAG
SYSTEM
BEFORE ATTEMPTING ANY STEERING WHEEL,
STEERING COLUMN, SEAT BELT TENSIONER, SIDE
AIRBAG, OR INSTRUMENT PANEL COMPONENT
DIAGNOSIS OR SERVICE. DISCONNECT AND ISO-
LATE THE BATTERY NEGATIVE (GROUND) CABLE,
THEN WAIT TWO MINUTES FOR THE AIRBAG SYS-
TEM CAPACITOR TO DISCHARGE BEFORE PER-
FORMING FURTHER DIAGNOSIS OR SERVICE. THIS
IS THE ONLY SURE WAY TO DISABLE THE AIRBAG
SYSTEM. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
8A - 8
AUDIO/VIDEO
ZB
RADIO NOISE SUPPRESSION COMPONENTS (Continued)
CAUTION: The speaker output of the radio is a
“floating ground” system. Do not allow any speaker
lead to short to ground, as damage to the radio
may result.
(1) Turn the ignition switch to the On position.
Turn the radio receiver on. Adjust the balance and
fader controls to check the performance of each indi-
vidual speaker. Note the speaker locations that are
not performing correctly. Go to Step 2.
NOTE: Subwoofer channel will not fade forward or
rearward. Use the bass control to check the sub-
woofer channel output.
(2) Turn the radio receiver off. Turn the ignition
switch to the Off position. Disconnect and isolate the
battery negative cable. Remove the radio receiver
from the instrument panel. Disconnect the wire har-
ness connector at the power amplifier. Check both
the speaker feed (+) circuit and return (–) circuit cav-
ities for the inoperative speaker location(s) at the
radio receiver wire harness connectors for continuity
to ground. In each case, there should be no continu-
ity. If OK, go to Step 3. If not OK, repair the shorted
speaker feed (+) and/or return (–) circuit(s) to the
speaker as required.
(3) For each inoperative speaker location, check for
continuity between the speaker feed (+) circuit cavi-
ties of the radio receiver wire harness connectors and
the power amplifier wire harness connectors. Repeat
the check for each inoperative speaker location
between the speaker return (–) circuit cavities of the
radio receiver wire harness connectors and the power
amplifier wire harness connectors. In each case,
there should be continuity. If OK, go to Step 4. If not
OK, repair the open speaker feed (+) and/or return
(–) circuit(s) as required.
(4) Check for continuity between the two ground
circuit cavities of the power amplifier wire harness
connector and a good ground. There should be conti-
nuity. If OK, go to Step 5. If not OK, repair the open
ground circuit(s) to ground as required.
(5) Install the radio receiver. Connect the battery
negative cable. Check for battery voltage at the fused
B(+) fuse for the power amplifier in the Power Dis-
tribution Center (PDC). If OK, go to Step 6. If not
OK, repair the open fused B(+) circuit to the PDC
fuse as required.
(6) Check for battery voltage at the two fused B(+)
circuit cavities of the power amplifier wire harness
connector. If OK, go to Step 7. If not OK, repair the
open fused B(+) circuit(s) to the power amplifier fuse
in the junction block as required.
(7) Turn the ignition switch to the On position.
Turn the radio receiver on. Check for battery voltage
at the enable signal to amplifier circuit cavity of the
power amplifier wire harness connector. If OK, go to
Step 8. If not OK, repair the open enable signal to
amplifier circuit to the radio receiver as required.
(8) Turn the radio receiver off. Turn the ignition
switch to the Off position. Disconnect and isolate the
battery negative cable. For each inoperative speaker
location, check both the amplified feed (+) circuit and
the amplified return (–) circuit cavities of the power
amplifier wire harness connectors for continuity to
ground. In each case there should be no continuity. If
OK, go to Step 9. If not OK, repair the shorted
amplified feed (+) and/or amplified return (–) cir-
cuit(s) to the speaker as required.
(9) Disconnect the speaker wire harness connector
at the inoperative speaker. Check for continuity
between the amplified feed (+) circuit cavities of the
speaker wire harness connector and the power ampli-
fier
wire
harness
connector.
Repeat
the
check
between the amplified return (–) circuit cavities of
the speaker wire harness connector and the power
amplifier wire harness connector. In each case there
should be continuity. If OK, replace the faulty
speaker. If not OK, repair the open amplified feed (+)
and/or amplified return (–) circuit(s) as required. If
condition is still present, go to Step 10.
(10) For each inoperative speaker location, check
the resistance between the amplified feed (+) circuit
and the amplified return (–) circuit cavities of the
power amplifier wire harness connectors. The meter
should read between 3 and 5 ohms (speaker resis-
tance). If OK, replace the faulty power amplifier.
ZB
AUDIO/VIDEO
8A - 9
SPEAKER (Continued)
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