Tail Light problems of the 1996 Oldsmobile Cutlass

Turn signal switch short. No taillights when turn signal is on. One way both side taillights go out and the other way one side of taillights go out. When turn signals are not being used, sometimes I have tailights and sometimes I don't. They blink on and off. This has almost caused an accident and it started after I had my car in the dealer for the recall work on the driver side airbag. I have no taillights and I am concerned about my safety when driving my car. It is very unsafe to be driving without any taillights. The only lights that work on the back end of my car are the brake light in the window and the reverse lights. The rest of the lights go on and off.