High Speed Operation

When the wiper switch is in the high speed position, battery voltage is applied through the windshield wiper switch high signal circuit to both the wiper ON/OFF relay and wiper HI/LO relay coils. This energizes both relays and allows battery voltage from the WIPER fuse to flow through the wiper ON/OFF relay to the switch input of the wiper HI/LO relay through its switch contacts and out to the high speed control circuit of the wiper motor.