Radio, Stereo, and Compact Disc: Description and Operation

CIRCUIT OPERATION

RADIO

Voltage to the Radio is available at all times through the ORN/BLK (60) wire to the in-line fuse, through the ORN (40) wire to the radio. the PWR ACC Circuit Breaker, TAIL LPS Fuse and the ORN (40) wire. This circuit provides voltage for radio station memory storage. It also provides voltage for the clock memory.

With the Ignition Switch in ACC or RUN, voltage is supplied to the Radio through the RADIO Fuse and the YEL (43) wire. Each speaker has its own pair of leads.

The Radio/Clock Display brightness is at full intensity with the Ignition Switch in ACC or RUN; voltage is supplied by the YEL (43) wire.

When the Park or Headlamps are turned on, voltage is supplied to the Radio through the BRN (9) wire. When the Radio senses this signal, the Radio switches voltage for the display from the YEL (43) wire to the GRA (8) wire. The display brightness is then controlled by the Panel and Interior Lamps Control Switch.

The radio illumination bulb voltage is supplied by the GRA (8) wire.