Importance

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Abstract

A system for providing an electrical power and electronic communication link between a tractor and trailer includes a tractor module associated with the tractor and a trailer module associated with the trailer. The tractor module controls a plurality of switching devices operable to switch a corresponding plurality of electrical lines extending between the tractor electrical system and the trailer to one of an electrical power line, a ground line and a communication line. The trailer module similarly controls a plurality of switching devices operable to switch a corresponding plurality of electrical lines extending between the trailer lighting system and the tractor electrical system to one of an electrical system of the trailer a communication line. The tractor and trailer modules are operable to establish a communication link therebetween and gather diagnostic data relating to the trailer electrical system, and to selectively route electrical power and/or ground to the trailer electrical system while maintaining control over the trailer lighting system each of the tractor and trailer modules is further operable to control their corresponding switching devices to switch back to the conventional electrical connection if the communication link is inoperable.

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First Claim