Vehicular circuit body

A vehicular circuit body provided in a vehicle, comprising:

• a plurality of control boxes;
• a trunk line that connects the plurality of control boxes to each other;
• and
• a branch line that directly or indirectly connects the control box to an accessory,
• wherein the trunk line and the branch line each includes a power source line having a predetermined current capacity and a communication line having a predetermined communication capacity;
• wherein each of the plurality of control boxes includes a plurality of branch line connection portions to and from which the communication line of the branch line is attachable and detachable;
• wherein each of the plurality of branch line connection portions is provided with a lock function portion that is physically or electrically brought into a lock state in a case where the branch line is not connected thereto;
• wherein each of the plurality of branch line connection portions includes a connector to and from which an end of the communication line is attachable and detachable, and the connector having a tubular outer peripheral face that has an upper wall, a bottom wall and a pair of side walls;
• and
• wherein the lock function portion includes:
• a cover member that covers all of an opening and the tubular outer peripheral face of at least one of the plurality of connectors, and
• a key part that prevents the cover member from being detached from the connectors in a lock state.