Abstract: The specification discloses a tractor-trailer electrical connector system including a first socket for being mounted in the tractor cab and having a plurality of male terminals for being wired to the fuse box of the tractor. A second socket is provided for being mounted in the trailer and includes a plurality of male terminals for being wired to the trailer terminal box. A multiwire cable is provided with a length to extend between the first and second sockets. First and second plugs are integrally molded to the ends of the cable, with each plug having a plurality of female receptacles dimensioned to receive the male terminals of the first and second sockets. Each of the sockets and plugs includes an inner core of elastomeric material which surrounds and insulates the terminals or receptacles. A rigid synthetic polymer housing covers the inner core to provide one piece sockets and plugs.

Abstract: The specification discloses a replaceable electrical connector plug for attachment to a multi-wire cable. A rigid thermoplastic housing includes a front plug portion and a removable rear portion which forms a rear cavity. A set of first female electrical terminals are disposed in the front of the front plug portion in order to receive male terminals which extend from a mating electrical socket. A second set of female electrical terminals are disposed in the rear of the front plug portion. The first and second sets of female terminals are electrically interconnected. Male terminals are connected to the ends of the multi-wire cable and are received within the second set of female terminals. The cable extends through the rear cavity. The removable rear portion may be selectively removed in order to enable replacing of the electrical connector plug when desired.