Ok seems like I have a rear taillight. Thats loose. What is the best way to get to this. Without making this a big job. Is there an easy way to take the bumper loose to tighten the light housing. Also Is it like the front turn signal lights ? Thanks for any help. Rick

You don't need to loosen or remove the rear bumper - it's likely the bracket that attaches to the lens, or the lens as it attaches to that same bracket, that is loose.

From under the car, you can remove/tighten the bracket and/or lens assembly as needed. Takes a little flexibility with your hands, but not too bad.