Antenna System

The antenna circuit consists of the antenna input of the radio, the antenna module, the COAX signal line between them, the rear window antenna, the front windshield antenna, and two control lines between the radio and the antenna module. When the radio is on, power is sent to the antenna module from the radio. In AM band, the antenna module connects the rear window antenna directly to the radio. When FM band is selected, a DC enable signal is sent from the radio to the antenna module. Superimposed on this enable signal is the strength of the signal being received by the radio tuner. The antenna module now performs two functions. It switches between the front and rear antennas, monitoring the radio signal strength to assure optimum operation. It also amplifies this optimized signal by 10 dB.

The radio antennas are two metallic appliques on the top of the windshield, and the top of the back window. These appliques are subject to damage when handled carelessly. If an antenna is damaged, that is, the metallic trace is cut causing an open circuit, the glass must be replaced.

For a description of the RPO Code(s) shown in this image/article refer to the RPO Code List found at Vehicle/Application ID RPO Codes