High-Speed Operation

With the wiper switch in the HI position, battery voltage is applied directly to terminal A of the wiper motor without passing through the park switch contacts. Terminal A is connected to a separate wiper motor brush for high-speed operation. The park switch coil remains energized in the HI position because of the voltage present at the low-speed wiper motor brush when voltage is applied to the high-speed brush. The current path from the low-speed brush to the park switch coil is completed through the wiper/washer switch assembly. An open circuit condition in this circuit will cause the wipers to cycle in and out of the park position in HI and possibly prevent low-speed operation.

When turned off from HI, the wipers complete the last sweep at low speed and park. To do this, the wiper motor receives voltage in the OFF position of the wiper switch, which is applied through the OK GRN wire to terminal C of connector C1. The park switch is de-energized when the wiper switch is moved to OFF, the contacts remain closed until the wipers reach the park position.