The following article discuss the audio system, radio and antenna of 1997 Dodge Caravan series. Herein you will find detail information about general information/ introduction to the audio system, description and operation of choke – infinity speakers, interference elimination, speaker relay, radio ignition interference, diagnosis and testing of antenna, antenna extension cable, antenna mast and cable lead, D-Pillar Speaker, instrument panel speaker, radio, tape and CD-player.
Some components used on the vehicles are equipped with a capacitor to suppress radio frequency interference/static. Capacitors are mounted in various locations internal to the generator, instrument cluster and windshield wiper motor. To eliminate radio interference, ground straps are used in different areas of the vehicle. These ground circuits should be securely tightened to assure good metal to metal contact.
The ground straps conduct very small high frequency electrical signals to ground and require clean surface contact area. The radio ground is supplied from the instrument panel harness and is attached to the rear of the radio. Some engines have other ground straps to eliminate further radio interference:
– Radio chassis to instrument panel structure
– Engine to dash panel
– Engine to chassis
– A/C valve to dash panel
Radio resistance type spark plug cables in the high tension circuit of the ignition system complete the interference suppression.