Conductivity testing method for a sub-harness and a sub-harness manufacturing apparatus

A conductivity testing method for a sub-harness in a sub-harness manufacturing process using a sub-harness manufacturing apparatus, the sub-harness manufacturing apparatus comprising:

• a pair of connecting units each having a wire connecting portion, made of metal, vertically movable so as to connect one end of one of wires composing a sub-harness to one of terminals having a sheathing clamping portion and being arranged in a wire feeding direction;
• and a pair of transferring means to transfer the terminals in a direction perpendicular to the wire feeding direction so as to position each one of the terminals under each wire connecting portions, wherein a clamping punch portion to clamp the sheathing clamping portion is provided on the wire connecting portion of each of the pair of connecting units,
• comprising the steps, in a connection process of connecting both ends of the one of the wires to the respective terminals, of:
• keeping one clamping punch portion having clamped the sheathing clamping portion onto one end of the one of the wires in contact with the sheathing clamping portion;
• keeping the other clamping punch portion having clamped the sheathing clamping portion onto the other end of the one of the wires in contact with the sheathing clamping portion;
• and
• testing conductivity between one and the other clamping punch portions so as to judge the one of the wires having the terminals on the respective ends being good or bad.