Abstract: A method and apparatus for forming a flat wiring harness having discrete wires in a predetermined orientation. The wires are positioned in grooves in a flat form, the grooves having the predetermined orientation and the form having connected thread openings extending therethrough and across the grooves. The wires in the grooves are stitched together by a sewing machine that is programmed to guide a sewing needle and thread through the openings in the form to produce the flat wiring harness having the discrete wires in the predetermined orientation.