My bird tail lights (the plastic sockets) kept falling out, just like most...but my buddy wired in F*rd sockets (metal) and hard wired ea one grounded...dont fall out , as a matter of fact they are hard in there ,so hard that once you pull one out its hard to put back in....I like `em....even though F*rd parts....metal sockets dont warp or shrink ...and you cant tell what they are unless you really lean over with your head in the trunk...