Brake Light problems of the 1996 Dodge Ram 1500

Dissimlar metal contacts re. Tailight sockets and type 3157 bulbs. Brake/turn/emergency flasher signal lights fail to light intermittently (both sides). (dashboard flasher lights indicate normal operation. ) twice replaced bulbs, but with later failure it was noted that moving unlit bulb or wiggling it causes it to work. Inspecting bulb shows corrosion/arcing at contact point(s). I now carry an emory board to clean corrosion from contact points when failure noted/reported. (3-7 mos mtbf) I intend to report this to the underwriters lab and to "sylvania" as an incompatibility/design electrical defect.