Radio, Stereo, and Compact Disc: Description and Operation

The electronically tuned Radio receives power from the RADIO Fuse and the YEL (43) wire when the Ignition Switch is in RUN or ACCY. The clock and memory circuits receive power from the ELEC Fuse and the ORN wire at all times. The Radio is grounded through the two BLK (150 and 153) wires. When tile ignition is in RUN or ACCY, the vacuum fluorescent display illuminates to display the time or radio frequency setting. When the radio ON/OFF Switch is switched ON, voltage is applied to the internal circuitry and to the PNK (143) wire and the amplifier, if equipped.

The Radio illumination is controlled by the Instrument Panel Lamp Dimmer. When the Headlight Switch is in PARK or HEAD, voltage is applied through the Dimmer Control and the GRY (8) and BRN/WHT (230) wires to the radio panel light and the internal circuitry. When the Headlight Switch is switched to PARK or HEAD, voltage is applied through the BRN (9) wire to the Radio, signaling the internal circuitry to adjust the brightness of the vacuum fluorescent display to a level determined by the voltage of the BRN/WHT (230) wire.

The Amplifier, if equipped, receives power at all times through the ELEC Fuse and two ORN (340) wires, and is grounded through two BLK (153) wires. A voltage signal is provided through the PNK (143) wire whenever the Radio is ON, turning the Amplifier ON. The Amplifier receives signals from the radio and sends amplified signals to the speakers.