Circuit body for vehicle

A circuit body for a vehicle, the circuit body being mounted on a vehicle body to supply electric power from a power source to an electric component and to transmit a communication signal, the circuit body comprising:

• a plurality of control boxes dispersedly arranged on the circuit body and configured to control input and output of at least one of the electric power and the communication signal;
• a trunk harness connecting one of the control boxes to another of the control boxes;
• and
• a branch harness connecting one of the control boxes to the electric component,
• the control boxes, the trunk harness and the branch harness being configured to ground a power circuit and a signal circuit through grounding routes different from each other, the power circuit supplying the electric power from the power source to the electric component through the control boxes, the signal circuit transmitting the communication signal between the control boxes and the electric component and between one of the control boxes and at least a third one of the control boxes.