Hi. My father in law just asked me about the rear third brake light (High mount lamp, part number FA1Z-13A613-AB). When the brake is applied, only the middle third of the light works. Neither side works. As I haven't ever held the brake down and been behind the vehicle simultaneously, I did not notice. I spent the last few hours trying to find information online and find pictures/video of the brake light on, but couldn't find a single pic/video! Is this normal where the light only is in the middle third of the lamp or does it need replaced?