The windshield washer switch on the Tempo/Topaz is incorporated into the wiper control switch. On 1984-88 vehicles, this feature is is the handle behind the steering wheel on the left. On 1989-94 vehicles. the washer function is actuated by pushing in on the wiper switch on the dashboard.
Because of the design of the system, the wiper/washer switch can only be serviced as an entire unit.