Premium Sound

Redundant Radio Control and Radio Knob Illumination

With the Main Light Switch in the OFF position, the Redundant Radio Control and Radio knob illumination bulbs are also off. With the Main Light Switch in PARK or HEAD, battery voltage is applied to the I/P Dimming Rheostat. The I/P Dimming Rheostat controls the brightness of the Redundant Radio Control and Radio knob illumination bulbs by determining the voltage present on circuit 19 (LB/R). See INSTRUMENT PANEL ILLUMINATION for more information.

Radio Time/Frequency Display Illumination

With the Main Light Switch in the OFF position, battery voltage is present at the Radio on circuit 434 (LB/BK). The Radio Time/Frequency Display illuminates at full brightness for maximum daytime visibility. With the Main Light Switch in PARK in HEAD, battery voltage is applied to the I/P Dimming Rheostat. The I/P Dimming Rheostat controls the brightness of the Time/Frequency Display by determining the voltage present on circuit 434 (LB/BK). See INSTRUMENT PANEL ILLUMINATION for more information.

Radio Memory and Operating Power

Voltage is present at the Radio at all times through Fuse 8 and circuit 54 (LG/Y). This constant power to the Radio maintains clock and station preset memory functions.

With the Ignition Switch in ACC or RUN, voltage is also present at the Radio through Fuse 11 and circuit 137 (Y/BK). When the Radio is turned on, current flows through circuit 137 (Y/BK) and the Radio circuits to ground. The Radio turns ON.

Premium Sound System

Vehicle equipped with the Premium Sound system have a trunk-mounted remote Premium Sound Amplifier to power the speakers. With the Ignition Switch in ACC or RUN, power is available to the Amplifier through Fuse 11 and circuit 137 (Y/BK). The Amplifier then powers the speakers according to signals from the Radio.