64’ No taillights in Buick Riviera - Riviera Owners Association Posted July 9 The problem seems to be that the bulbs are loose within the metal housing and eventually lose contact with the socket (same setup as the pictures posted by 60Flattop). The metal housing within the taillight socket does not hold the bulb tight and therefore when this happens I lose blinkers, taillights and/or brake lights. I've seen other guys with similar GM taillights try and solder that metal housing closed to keep the bulb tight in the socket. I'll continue to explore different options. Just frustrating to continue to mess with it. I am definitely using the correct bulb.