Abstract: An apparatus and method for securing a trailer door is provided, the apparatus and process includes a locking apparatus having a housing containing an electronic lock responsive to a signal from a remote wireless device such as a cell phone. A pair of opposingly spaced securement members are used to attach the locking apparatus to vertical support members on the exterior of a cargo door. One of the securement members is responsive to the electronic locking mechanism to engage the support member thereby preventing opening of the trailer door.