The invention relates to an illumination or signaling device for automotive vehicle. The illumination and/or signaling device for an automotive vehicle includes a dielectric substrate 2 including a plurality of conductive tracks, and a plurality of light-emitting diodes 1 surface-mounted on the dielectric substrate. The light emitting diodes are electrically connected to the conductive tracks of the dielectric substrate according to a predetermined connection plan. At least one control circuit board for controlling the light-emitting diodes includes a plurality of connecting pins and an electrical connection circuit board 3 including a plurality of conductive lines for electrically connecting the connecting pins of the control circuit board to the conductive tracks of the dielectric substrate according to a predetermined connection plan. The electrical connection circuit board 3 is connected to the conductive tracks of the dielectric substrate 2 via an anisotropic conductive film.