Dodge 2000 DURANGO Service Manual page 344

8F - 4 AUDIO SYSTEMS
DESCRIPTION AND OPERATION (Continued)
ANTENNA
DESCRIPTION
All models use a black painted fixed-length stain-
less steel rod-type antenna mast, installed on the
right front fender of the vehicle. The antenna mast
has a spiral groove cut down its length to reduce
wind noise. The antenna mast is connected to the
center wire of the coaxial antenna cable, and is not
grounded to any part of the vehicle. To eliminate
static, the antenna base must have a good ground.
The coaxial antenna cable shield (the outer wire
mesh of the cable) is grounded to the antenna base
and the radio receiver chassis.
The antenna coaxial cable has an additional dis-
connect, located near the inboard side of the glove
box opening on the back side of the lower instrument
panel reinforcement.
allows the instrument panel assembly to be removed
and installed without removing the radio receiver.
The factory-installed Electronically Tuned Radios
(ETR) automatically compensate for radio antenna
trim. Therefore, no antenna trimmer adjustment is
required or possible when replacing the radio
receiver or the antenna.
RADIO NOISE SUPPRESSION
DESCRIPTION
Radio Frequency Interference (RFI) and Electro-
Magnetic Interference (EMI) noise suppression is
accomplished primarily through circuitry internal to
This additional disconnect
the radio receivers. These internal suppression
devices are only serviced as part of the radio receiver.
External suppression devices that are used on this
vehicle to control RFI or EMI noise include the fol-
lowing:
• Radio antenna base ground
• Radio receiver chassis ground wire or strap
• Engine-to-body ground strap(s)
• Exhaust system-to-body ground strap (4.7L
engines only)
• Resistor-type spark plugs
• Radio suppression-type secondary ignition wir-
ing.
For more information on the spark plugs and sec-
ondary ignition components, refer to Ignition Sys-
tem in the Description and Operation section of
Group 8D - Ignition System.
DIAGNOSIS AND TESTING
AUDIO SYSTEM
WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS, REFER TO
RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING WHEEL,
INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
GROUP 8M - PASSIVE
STEERING COLUMN,
DN
OR