The invention relates to a method for programming a wiper system (10; 10a) for vehicle windscreens, in which for operating respectively a windscreen wiper (14, 15) a wiper module (12, 13) on the driver's side is programmed as master module (36) and a wiper module (12, 13) on the passenger's side is programmed as slave module (37), wherein the wiper modules (12, 13) consist of a reversing motor (18), if applicable a gear (19), a holder (22, 23) for fastening to the body of a vehicle, and a control (20), wherein in the control (20) at least data for a program sequence (38), vehicle-specific characteristic data (39) and data for the operation of the wiper module (12, 13) as master module (36) or respectively as slave module (37) are stored, wherein at least the wiper module (12, 13) on the driver's side is connected via an on-board wiring system interface (30) and a first data communication line (32) with a vehicle control unit (28). According to the invention, provision is made that before the activation of the wiper module (12, 13) on the driver's side via the first data communication line (32) in its control (20) the wiper module (12, 13) is defined or respectively pre-programmed neither as master module (36) nor as slave module (37).