Ford 1997 Crown Victoria Manual page 98

To set the interval wipers, turn the knob at the
end of the turn signal lever toward or away
from you until the wipers are going at the
desired interval.
Windshield Washer
To clean the windshield, push in the end of the
wiper knob. For a constant spray, keep the knob
pushed in. After you release the knob, the
wipers operate for two to three cycles before
turning off (if the wipers were OFF) or
returning to HI, LO, or the interval setting
selected.
If the washer does not work, check the washer
fluid level and fill it if it is low. See the
Maintenance and Care chapter. If there is enough
fluid, consult your nearest Ford or
Lincoln-Mercury dealer.
Do not try to clean the windshield when the
washer fluid container is empty or activate the
washers at any time for more than 15 seconds
continuously. This could damage the washer
pump system.
Always warm up the windshield with the
defroster before you use the washer fluid.
In freezing weather, the washer solution
may freeze on the windshield and obscure
your vision.
For information about refilling the washer fluid
or replacing your windshield wiper blades, see
Windshield washer fluid and Wipers in the Index.
WARNING
97