Intermittent Operation

The wiper motor operates the wiper arms one time at low speed at a set interval of approximately 1 to 20 seconds. This feature is controlled by the time control unit.
When the wiper switch is placed in the INT position, ground is supplied
^ to time control unit terminal (12)
^ from wiper switch terminal (15)
^ through body grounds (E10) and (E33).
The desired interval time is input
^ to time control unit terminal (14)
^ from wiper switch terminal (19).
Based on these two inputs. an intermittent ground is supplied
^ to wiper relay terminal (2)
^ from time control unit terminal (1).
With power and ground supplied, the wiper relay is activated.
When activated, an intermittent ground is supplied
^ to wiper motor terminal (2)
^ through the wiper switch terminal (14)
^ to wiper switch terminal (13)
^ through wiper relay terminal (3)
^ to wiper relay terminal (5)
^ through body grounds (E10) and (E33).
Wiper motor operates at desired low speeds with time control unit terminal (1) grounded.