WARNING: This page is about a different car, the 2002 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Wiper/Washer System Schematics (w/o CE1)
Courtesy of GENERAL MOTORS CORP.
Fig 2: Wiper/Washer System Schematics (Power, Ground, and Switch Circuits w/CE1)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Wiper/Washer System Schematics (Module, Pump, and Sensor Circuits w/CE1)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Wiper/Washer System Schematics (Fluid Level Switch)