Lamp out ding dong
Mine had a very loose bulb in the passenger side rear light, I think it was the middle one, looked like the fixture wasn't made right. I cut a piece or elec. tape narrow enough to just go around the part of the bulb that met the holder, and made one turn around the bulb with it.
So far---knock on wood--so good.
It sure was a god awful racket, tho.