1998 Plymouth Voyager left turn signal

My left turn signal only works when it feels like it. Sometimes it will work when you turn the signal to activate the left and then turn on the hazard lights for 3 - 4 cycles. Sometimes this doesn't even work. On other occasions it works just fine. There are no problems with the right one. Don't know if related or not but when headlights on the front park lights will turn on/off by themselves.
Richard