A method for installing an antenna system having an antenna located exterior to a vehicle. The antenna system has at least one electrically conductive wire to be extended into interior of the vehicle for providing electrical connection to a receiver located in the interior. When the vehicle includes at least one window pane surrounded at least partially by a flexible seal adjacent a weather shield to a portal, the method comprises the steps of positioning the conductive wire in the flexible seal; leading the conductive wire from the flexible seal towards the weather shield; and leading the conductive wire to the receiver through the weather shield.