The methods are as follows:

According to the detailed list of the whole vehicle harness configuration, the direction of the harness in the 3D wiring diagram, using the measuring tools in CATIA, according to the drawing requirements of the harness diagram, the required dimensions of the trunk, branch, buckle, tie and rubber parts are measured, and the outline of the harness diagram can be basically determined by reasonable design to arrange the 2D drawing. As shown in the figure, the door harness of an automobile manufacturer's SUV is a 2D harness map transformed from the 3D wiring diagram. Combined with various technical documents provided by the main engine factory, the model, location and function of the sheath in the drawings are determined, the model and schematic drawings of the tie-up, buckle and rubber parts are determined, and the details of the drawings are perfected.