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An eight way electrical coupling system for electrically interconnecting a tractor and a trailer. The electrical coupling system includes a wiring harness between tractor and trailer vehicles having base plates with eight pronged electrical connections each including a central electrical male termin

An eight way electrical coupling system for electrically interconnecting a tractor and a trailer. The electrical coupling system includes a wiring harness between tractor and trailer vehicles having base plates with eight pronged electrical connections each including a central electrical male terminal surrounded by seven radially disposed equidistant electrical male terminals arranged in a circular configuration. An adapter is also described for electrically interconnecting an electrical wiring harness, having seven or eight wires between tractor, and trailer base plates, having seven or eight pronged electrical connections.

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[ We claim:] [1.] An electrical coupling system for electrically interconnecting a tractor vehicle and a trailer vehicle each having a wiring system, the electrical coupling system comprising:a) a tractor plate fixably connected to the tractor vehicle, said tractor plate having only eight male elect

[ We claim:] [1.] An electrical coupling system for electrically interconnecting a tractor vehicle and a trailer vehicle each having a wiring system, the electrical coupling system comprising:a) a tractor plate fixably connected to the tractor vehicle, said tractor plate having only eight male electrical terminals electrically connected to electrical circuits forming the wiring system of the tractor vehicle, wherein said eight tractor plate male electrical terminals are configured in the form of a central male electrical terminal circularly surrounded by seven radially disposed and equidistantly spaced male electrical terminals;b) a trailer plate fixably connected to the trailer vehicle, said trailer plate having only eight male electrical terminals electrically connected to electrical circuits forming the wiring system of the trailer vehicle, wherein said eight tractor plate male electrical terminals are configured in the form of a central male electrical terminal circularly surrounded by seven radially disposed and equidistantly spaced male electrical terminals; andc) a wiring harness having only eight wires for removably and electrically interconnecting the tractor plate and the trailer plate; andd) an electrical coupling system adapter for enabling the electrical interconnection of the tractor plate fixably connected to the tractor vehicle that has only eight male electrical terminals with a trailer plate fixably connected to a trailer that has only seven electrical terminals via the wiring harness having only eight wires.