i would like to know the awnser to this question as well im swping a 3.8 SC in my jeep and dont know what those are for and i cant get any spark and everything is hooked up but those i gave the red wire power and it turns my computer on and lets my modius read codes but cant get any spark they are for the ignition i belive the red wire is for hot the pink with black is something with the fuel pump monitor and the yellow with red is the knock sensor but that is all i can figure out