Ford 1997 Aerostar Manual page 23

Odometer/Trip Odometer
The Liquid Crystal Display (LCD) odometer is a
combination trip odometer and total odometer.
The total odometer is normally displayed. To see
the trip odometer, press and release the SELECT
control on the upper right side of the
speedometer. To zero out the trip odometer,
press and release the RESET control on the
upper left side of the speedometer while the trip
odometer is displayed. If the trip odometer is
displayed, press and release the SELECT control
to return the display to the total odometer value.
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