Abstract: There is disclosed a junction box including a junction box main body to which an electric component to be connected is attached, a connector portion, formed separately from the junction box main body, for connecting a connector of an outer wiring circuit, and a cable portion which includes a flexible printed circuit with a circuit portion including a conductor pattern formed on an insulating film, and electrically connects the junction box main body to the connector portion. With respect to an attachment position of one of the connector portion and junction box main body, an attachment position of the other can freely be changed.

Abstract: There is disclosed a junction box including a junction box main body, a connector portion, and a cable portion which connects the junction box main body to the connector portion. Terminal connecting portions are formed to extend from opposite side edges of a strip portion of a flexible printed circuit constituting the cable portion in a short direction of the strip portion, and are connected to first to third connecting terminals. The third connecting terminal is connected to a desired connecting terminal connecting portion of a circuit distribution wiring circuit of a joint connector, electricity is conducted through a plurality of circuit portions in a desired circuit mode, and a wiring design freedom degree is enhanced.

Abstract: A network system for transmitting vehicle data has a bidirectional multidrop ring in which data communication between data transmitting nodes and corresponding data receiving nodes is carried out even if a breakage or some other trouble occurs at a portion of the multidrop ring. This system ensures safe and reliable control of various vehicle loads for a long period of time. At least one multidrop bus or at least one further bidirectional multidrop ring may be electrically connected to the first-mentioned bidirectional multidrop ring, thereby widening the applicability of the system to the control of vehicle loads.