Hey Guys, I just finished the driver side rear taillight. What i did was too take the light apart and disconnect the wires from inside that light rather than disconnect the wires from the car. The 2 screws on the back of the housing can be a pain in the *** to get off. After getting the light loose from the car, use something flat and clean out the slot's of the 2 screws on the back of the housing and get the area as clean as possible. Spray with WD40 and let it sit overnight Then what i found that works best is to use the short stubby screw drive that most of us have but never use and they should come out. A regular screw driver is to long in that area and you wont have that much leverage. AND PROTECT YOUR BUMPER!
While the light is out of the car,clean the area really well. Get all that old dried dirt out of there. I found alot under the seal on the bumper under the light when i took mine out. And remember to treat your seal before putting it back in the car. I used 303. I hope this helps. You will get it.
ROB G