Ford 2002 Crown Victoria Manual page 27

Entertainment Systems
Turn the control to raise or lower
volume.
VOL - PUSH ON
If the volume is set above a certain level and the ignition is turned off,
the volume will come back on at a "nominal" listening level when the
ignition switch is turned back on.
Bass adjust
The bass adjust control allows you
to increase or decrease the audio
system's bass output.
BASS
Treble adjust
The treble adjust control allows you
to increase or decrease the audio
system's treble output.
TREB
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