Abstract: There is provided a fuse relay junction block for use in automobiles capable of not only considerably reducing the number of assembling process but also realizing small sized, lightweight compact block, thereby enhancing reliability and achieving a low cost material by aggregating the conventional plural pieces of boards to form a multilayered circuit structure. The fuse relay junction block comprises a box cover having a plurality of connection ports through which wirings of electronic wiring systems are connected to terminals of wiring members and a plurality of filling ports for fuses, a box body engaged in the box cover, a multilayered board housed between the box cover and the box body, wherein said wiring members being arranged on not less than two layers of board and integrated with primary molded portions by insert molding to form a network structure, said network structure is subjected to an insert to form a secondary molded portion.

Abstract: The invention provides an engine fuel rail compact and having highly reliable functions because it is an insert-molded product integral with an electrical wiring, contributing to reduction in the number of fabrication steps and cost of fabrication, and a method of fabricating the same. An oil delivery path and the electrical wiring in parallel therewith are embedded in a base member molded from a synthetic resin, as a main body, so as to be integral with each other, and a plurality of branching blocks for respective cylinders of an engine are provided protuberantly on the right side and the left side of the base member, alternately, the base member having an opening at one end thereof to serve as a socket on an input side for the electrical wiring, while the end face of respective branching blocks has an opening to serve as a fixture mount for respective injectors and an opening to serve as a socket on an output side for connection of the respective injectors with the electrical wiring.