Ok i know this has been done a million times and been a topic before though I cannot find it. . . Do i need to change my complete interior harness like many say, or some say the door harnesses will plug into the back of my fuse box, etc. . . or if I have the pigtails from the doors can I manually wire it up and if so does anyone have a diagram with wiring and relay specs. . Thank you in advance for everyones help. . .

 

u can use the wires from the door i think. at least thats what my homie did for my hatch.