WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Testing Multifunction Switch, Wiper/Washer Portion (1 Of 2)
Courtesy of FORD MOTOR CO.
Fig 2: Testing Multifunction Switch, Wiper/Washer Portion (2 Of 2)