A control module for a reversing contactor includes a housing configured to mount to forward and reverse contactors. The control module is configured to receive command signals for the forward and reverse contactors and provide the command signals to an interlock circuit included within the housing of the control module. The interlock circuit is configured to use the forward and reverse commands as well as feedback signals corresponding to the current status of the contactors to prevent both the forward and reverse contactors from being closed in tandem. The control module is also configured to mount to contactors having different physical sizes. The housing may be configured as a telescoping housing, where one portion of the housing is fixed and a second portion of the housing slides with respect to the fixed portion of the housing to adjust the width of the control module.