This isn't my car, nor am I doing the mod. The car belongs to my dad, and he is in the process of installing a Zex nitrous kit. He had also ordered a traction control unit to go along with the nitrous kit. One of the wires has to connect to the tachometer wire, which he can't find. I tried looking it up online and could not find anything that is relevent to what I'm looking for. Anyone that has anything helpful would be greatly appreciated. Thanks!