An electrical connector for connecting a tractor-trailer electrical cable to a truck tractor or a trailer, comprising: a connector body having an outer wall defining an interior connector space and having a terminal support wall dividing the interior space into a socket space configured to receive a plug of an electrical cable and a terminal seal space, the terminal support wall having a plurality of holes in an array, the body having an external circumferential rib at a head end; a cap attached to the connector body by a hinge, the cap having a closed position and an open position and being spring biased toward the closed position, the cap having a lock member formed thereon to engage a locking mechanism on a trailer cable, wherein the electrical connector further comprising: a housing defining an interior space, the housing comprising a mounting flange extending radially therefrom at a head end, at least one locking tab (250, 255) at the head end, and a wall dividing the interior space into a head end space and a foot end space, characterized in that, the wall having an equal plurality of holes in an array as in the array in the connector body; a plurality of terminal pins secured against movement in the holes in the wall and extending from the foot end space into the head end space; wherein, the connector body is insertable in the head end space of the housing to a position with the terminal pins extending through the holes in the terminal support wall into the connector space and the at least one locking tab (250, 255) engaging the circumferential rib to secure the connector body in the housing. a connector body having an outer wall defining an interior connector space and having a terminal support wall dividing the interior space into a socket space configured to receive a plug of an electrical cable and a terminal seal space, the terminal support wall having a plurality of holes in an array, the body having an external circumferential rib at a head end; a cap attached to the connector body by a hinge, the cap having a closed position and an open position and being spring biased toward the closed position, the cap having a lock member formed thereon to engage a locking mechanism on a trailer cable, wherein the electrical connector further comprising: a housing defining an interior space, the housing comprising a mounting flange extending radially therefrom at a head end, at least one locking tab (250, 255) at the head end, and a wall dividing the interior space into a head end space and a foot end space, characterized in that, the wall having an equal plurality of holes in an array as in the array in the connector body; a plurality of terminal pins secured against movement in the holes in the wall and extending from the foot end space into the head end space; wherein, the connector body is insertable in the head end space of the housing to a position with the terminal pins extending through the holes in the terminal support wall into the connector space and the at least one locking tab (250, 255) engaging the circumferential rib to secure the connector body in the housing. a housing defining an interior space, the housing comprising a mounting flange extending radially therefrom at a head end, at least one locking tab (250, 255) at the head end, and a wall dividing the interior space into a head end space and a foot end space, characterized in that, the wall having an equal plurality of holes in an array as in the array in the connector body; a plurality of terminal pins secured against movement in the holes in the wall and extending from the foot end space into the head end space; wherein, the connector body is insertable in the head end space of the housing to a position with the terminal pins extending through the holes in the terminal support wall into the connector space and the at least one locking tab (250, 255) engaging the circumferential rib to secure the connector body in the housing.