check that the sensors on your front left control arms and rear control arm are still attached, however if the headlights do not cycle up and down when first turning them on then the little servo motor has either failed or disconnected itself. I had the issue where the ball on the servo disconnected itself from the reflector, it was a small job of opening the bumper lining and clipping of the bumper to remove the headlight. after that it was 5 min to slot it back in and all was normal.