Ford Focus 2004 Owner's Manual page 36

Controls and features
Washer
While the button at the end of the
lever is pressed or the lever is
pulled towards the steering wheel
the washer will work in conjunction
with the wipers.
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Once the wash/wipe cycle is
completed, the wipers will pause
and then perform one more wipe to
clear the screen.
This will also operate the headlight
washers when the headlights are
switched on (depending on country
and equipment fitted).
After releasing the button or lever,
the wipers operate for a short time.
Do not operate the washer
for more than 10 seconds at
a time, and never when the
reservoir is empty.