Antenna: Description and Operation
With the Ignition Switch in ACC or RUN, voltage is applied through Fuse 11 to operate the Radio.
Fuse 8 applies voltage to the Radio at all times to power the memory-related functions, which retain the memory portions with the Radio turned off.
Panel dimming is controlled by the Instrument Panel Dimming Rheostat. A variable voltage is applied through the 88 (BK/W) wire to control the brightness of the panel lamps.
The display's brightness is controlled by the Main Light Switch, Pulse Width Dimming Control, and the LCD Dimming Relay. When the park lamps are turned on, battery voltage is applied to the Radio through the 484 (O/BK) wire and turned off, voltage is no longer applied to the Radio, and the display brightens.
JBL/Premium Sound
The Premium Sound feature incorporates a Radio with cassette deck and a four-channel Amplifier. The JBL System feature incorporates a Radio with CD Player and a Four Channel Amplifier. Voltage is applied to the Radio from Fuse 11 through the 137 (Y/BK) wire when the Ignition Switch is in ACC or RUN.
Voltage is also applied to the Radio Amplifier through the 37 (Y) wire. The Radio Amplifier is grounded through the Radio and 694 (R) wire. The Radio provides an audio signal for each channel. The Amplifier processes the audio signal provided by the Radio and supplies it to the individual speakers.