No factory harness. Currently installing an Ez-wiring kit (which is about the same as a painless universal kit I believe). Seems i only have 4 wires going to the ignition.. The original ignition wiring had 5-6 wires coming out (That small purple or black thing that we speak of, and another big pink wire that said "DO NOT CUT OR SPLICE. RESISTOR" that from my calculations, went to the regulator. I don't have a regulator (Well, it will be internal) nor did my kit have something to hook up to that pink wire, so...? Who knows.. That pink wire came out of the same terminal as the wire that goes to the ignition coil. On the kit side, there was an extra brown wire that said "Ignition Wire Ignition" that as far as I can tell is only used on their GM wiring instructions. I don't know what GM has going on, but these ez-wiring kits are prewired for GM vehicles. There were two plugs to go the ignition switch (Whatever a GM plug looks like). The main one, and a secondary one that also had a main power feed (It was spliced off the other ignition plug) and that brown wire.. beats me? So now my ignition switch only has 4 wires going into it. Accessory, Coil, main power, and solenoid ignition. Not sure what to do with this violet or black one, and that missing pink one. But, even though I don't have the car ready to run, it still clicks the solenoid.