Wiper system for a vehicle with a screen wash system

An assembly for at least one wiper arm intended to wipe a glazed surface of a motor vehicle, the assembly comprising:

• a drive motor to drive the at least one wiper arm;
• and
• a means for generating electrical control signals that comprises:
• a cam surface linked in concentric rotation with a rotary shaft of the drive motor;
• and
• static cam reading means able to cooperate with said cam according to angular positions occupied by said cam to generate electrical control signals varying as a function of the angular position of the at least one wiper arm on the glazed surface,
• wherein the cam has a first circular conductive track comprising a closed circumference that intersects the entirety of a circumference of a circle, a second semi-circular conductive track that is concentric to the first conductive track and connected to the first conductive track via a conductive bridge and the second conductive track reinforces the mechanical strength of the conductive bridge,
• wherein the static reading means are formed by a first, second, and third sliding contacts able to make and break an electrical contact with respectively the first and second conductive tracks and the conductive bridge depending on the angular positions occupied by said cam,
• wherein the third sliding contact that is related to the conductive bridge is linked to a control terminal of the drive motor to indicate a stopped position, and
• wherein the length of the second conductive track corresponds to an angle defining the spray function of a screen wash system wherein the spray function is defined to spray when the at least one wiper arm is moving upwards.