US Patent 9834133 Wireless link and a vehicle electrical system using the same

Provided is an electrical communication link between a tractor and a trailer, the trailer comprising one or more auxiliary electrical devices, the electrical communication link including a first transceiver coupled to the tractor and configured to receive a first signal from the tractor and to wirelessly transmit a control signal corresponding to the first signal, a second transceiver coupled to the trailer and configured to wirelessly receive the control signal and to transmit a second signal corresponding to the control signal to the one or more auxiliary devices.