Ford 1999 Wagon-Econoline Owner's Manual page 24

Controls and features
Volume/power control
Press the control to turn the audio
system on or off.
Turn the control to raise or lower
volume.
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.
AM/FM select
The AM/FM select control works in
radio mode.
AM/FM select in radio mode
This control allows you to select AM or FM frequency bands. Press the
control to switch between AM, FM1 or FM2 memory preset stations.
Tune adjust
The tune control works in radio mode.
24
VOL
PUSH
ON
VOL
PUSH
ON
AM/FM