Circuit Operation

The radio receives battery voltage at all times on circuit 640 through Fuse 10 to keep clock and preset station memory alive when the ignition switch is in the OFF position. With the ignition switch in the ACCY or RUN position, voltage is applied to circuit 43 through Fuse 38 to enable the radio operation. The radio is grounded through circuit 351. When the ignition switch is in the RUN or ACCY position, the vacuum fluorescent display illuminates to display the time or radio frequency setting.

The radio illumination is controlled by the instrument panel lamp dimmer. When the headlamp switch is in the PARK or HEAD position, voltage is applied through the dimmer control and circuit 230 to the radio panel lamp and the internal circuitry. When the headlamp switch is switched to the PARK or HEAD position, voltage is applied through circuit 308 to the radio, signaling the internal circuitry to adjust the brightness of the vacuum fluorescent display to a level determined by the voltage in circuit 230.

Compact Disc And Cassette Player
If equipped, the Compact Disc (CD) or cassette player is part of the radio unit. When operating, the same power required by the radio is necessary for tape or CD player operation.