Circuit Body for Vehicle

A circuit body () for a vehicle includes: a plurality of control boxes () dispersedly arranged on the circuit body; a trunk harness () connecting one of the control boxes to another of the control boxes; and a branch harness () connecting the control box the electric component. The control boxes, the trunk harness and the branch harness is configured to ground a power circuit and a signal circuit through grounding routes different from each other. The power circuit supplies the electric power from a power source (BAT) to the electric component through the control boxes. The signal circuit transmits a communication signal between the control boxes and the electric component and between one of the control boxes and another of the control boxes.