Ford 1999 Taurus Owner's Manual page 93

OFF — the wipers will operate at low speed as
long as the washer button is held. When the
washer button is released the wipers will complete
two to three cycles, depending on the position of
the wipers when released, and then park.
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.
88
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.
WARNING
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.