If your truck origionaly had turn signals you can just wire it up. But if it didnot have turn signals you will need to install a turn signal switch that will also let you use the stop lamp feature. Some of the origional aftermerket turn signal switches require separate lights for turn signals and brake lamps. The newer ones will let you combine the turn signals and brake lamps together in the same bulb. You will only need 3 wires; lt. turn, rt. turn, and park lamp wires.
For the old style turn signal switch you will have 4 wires. Lt. turn, rt. turn,park lamp, and brake lamp.

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