Re: GTV: Usless headlights
Take off the rubber boot sealing the low beam bulb holder at the rear of the unit. Poke a finger around the outside of the reflector. There is a metal lever that adjusts a metal "deflector" up or down in front of the bulb. This thin plate (which I call the deflector) may have sagged, as it is mounted "upside down", blocking to much light before it reached the lens. How do I know? My LH low beam light's lens was "smoked up" on the inside. Succeeded to split the unit and the frons lens by removing the clips and then heating it up with a hot air gun. (Seemed the bulb fitting overheated, probably due to a bad connection in the holder, giving off slight smoke inside the unit.) I cleaned the lenses on the inside and moved the deflector out of the way as much as possible. This, and an adjustment of the headlights, restored much of the vision at night.
Assembly: Heat the unit again. Resealed the unit with mounting putty, called Prestic by Bostik (a brand name in South Africa).