An electronic control circuit for a motor vehicle starter contacter includes a management unit (26) having: first means for detecting the open or closed state of the power contact (20), and second means for regulating the power supply of the winding (18) during the starting cycle when the power contact (20) is still open after a predetermined period of time following commencement of the order for starting. In order to obtain automatic elimination of any fault in the form of an insulation effect, due to dirt or to an insulating particle in the contact zone during the starting process, and to match the energy supplied to the contacter, the second means are so arranged as automatically to produce, during a period of time, a set of pulses which are delivered to the winding (18) in such a way as to reiterate actuation of the contacter (16) so long as the order for starting is maintained, and in order to modify the intensity of the power supplied to the winding (18) during the said period of time, or when the operator reiterates the demand for starting in the event of failure of the moving contact (20) to close.