Low and High Speed Wiper Operation

Ground is supplied to wiper switch terminal (17) through body grounds (E10) and (E33).
When the wiper switch is placed in the LO position, ground is supplied
^ through terminal (14) of the wiper switch
^ to wiper motor terminal (2).
With power and ground supplied, the wiper motor operates at low speed.
When the wiper switch is placed in the HI position, ground is supplied
^ through terminal (16) of the wiper switch
^ to wiper motor terminal (3).
With power and ground supplied, the wiper motor operates at high speed.