Circuit/System Description

Wash, Mist, Delay 1-5, Low, and Park are all low speed wiper motor functions controlled by the body control module (BCM). The BCM energizes the ON/OFF WPR relay in order to operate the wiper motor at low speed. The high speed wiper function operates independent of the wiper switch signal 1 circuit and any BCM output. During high speed wiper operation the wiper switch signal 2 circuit directly energizes the HI/LOW WPR relay and energizes the ON/OFF WPR relay through the wiper diode #90.