With Pulse

When the wiper switch is in delay position, a shunt is applied to two of the inputs at the pulse wiper relay by the wiper switch to start the pulse operation. The pulse wiper relay momentarily supplies battery voltage to wiper switch to run wiper motor. The wiper blades make one sweep and reach park, the park/run switch opens. The wiper blades remain in park until the pulse wiper relay supplies battery voltage to start another sweep. The delay time between sweeps is determined by circuits in the pulse wiper relay.