A contactor control system having a primary microprocessor, a secondary microprocessor, a high side contactor control circuit, and a low side contactor control circuit is provided. The primary microprocessor sends a first command signal to the secondary microprocessor. The secondary microprocessor sends a command signal to the secondary grounding circuit for outputting a ground level voltage to a logical OR circuit to induce the logical OR circuit to output a ground level voltage to a second end of the contactor coil. The primary microprocessor sends a command signal to the secondary microprocessor, and in response the secondary microprocessor sends a command signal to the secondary pull-in circuit to activate the secondary pull-in circuit for energizing the contactor coil.