This socket no longer works because it has lost ground because of corrosion. There is supposed to be a ground connection between the socket and the larger tail light housing. It works just fine when I run a jumper from a ground to the outside of the socket or the lip of the socket in the top photo. I would like to remove the socket and clean it up or replace it, but it appears to have been pressed in through the back of the housing and crimped into place on the front side. The arrow in the top photo points to the crimped over section. When I turn the back of the socket with pliers, the part shown in the top photo rotates too. Are these sockets really not removable, or is there a trick to getting them out? For this one, I might be able to solder a ground wire to the back of the socket, but I have two others that don't work for other reasons and need to be removed and repaired or replaced. Thx.