A method for assembling a wire harness on a display surface, the wire harness comprising bundles, each one of which corresponds to a bundle route selected among possible bundle routes and each one of the possible bundle routes comprising two ends. The method comprises receiving coordinates of a layout of the wire harness; generating at least a portion of all the possible bundle routes by identifying coordinates of portions of each of the two ends from the coordinates of the layout of the wire harness. Then determining which bundle routes among the possible bundle routes correspond to the bundles to be used. Defining, from the coordinates, a sequence in which the bundles are to be routed and generating a plurality of signals. Finally sending each one of the signals for display sequentially on the display surface according to the defined sequence.