The invention relates to a wiper system (1) for wiping a glazed surface of a motor vehicle having a washer system (3) able to be used in combination with a reservoir (5) containing a washer fluid, said wiper system comprising - a drive motor (7) for driving at least one wiper arm, - a pump (11) intended to be fluidly connected firstly to said reservoir (5) and secondly to at least two spray nozzles at least one of which is able to deliver a jet of fluid to the windshield of a vehicle and at least another of which is able to deliver a jet of fluid to the rear screen of a vehicle, and - a switch (17) having at least a first position for supplying said at least one spray nozzle able to deliver a jet of fluid to the windshield and a second position for supplying said at least one spray nozzle able to deliver a jet of fluid to the rear screen, - the pump (11) being a two-way pump capable of being driven in two opposite directions of rotation to supply one or other of the spray nozzles under the control of said switch (17), characterized in that means (9) for generating electrical control signals which are connected to the drive motor (7) are able to generate electrical control signals that vary according to the angular position of the wiper arm on the glazed surface and in that said two-way pump is supplied when the switch (17) is in the first position via the means (9) of generating electrical control signals which are connected to the drive motor (7) according to the angular position of the wiper arm on the glazed surface.