Taillight Problem on a 83...help please

Im not much with the wires and stuff, but i replaced the bulb and the taillight still wont work. The Brake light works but the blinker and taillight dont work. Its the rear right tailight. Thanks

Sounds like wiring, try to find where the wires have been corroded. BEing as its an old truck thats probly your cause. And if your wiring inclined, have someone do it for ya!