The wiring harness was originally from an automatic. Apparently there is some extra wiring in there, but I'm not sure exactly what all is different. There is another separate smaller looking ECU that was mounted above the actual ECU. The wires from it wire into a transistor for A/T and then it looks like they go into the TPS too and then back into the body harness. If anything I'd like to disconnect this whole piece, but I'm not sure if it's all interconnected yet or not. This harness stuff is getting me loopy trying to figure out what goes where and what is tied into what. If I had a 180SX A/T or M/T wiring diagram complete with colors and sensor types labeled, I would be set I think. The ECU Pin out will help, but how do those numbers correspond to the wires exactly?!! So apparently I will need all the Relays, fuses and such that are tied into the power cable??? Boy this will be a HUGE job. I can't really do anything until I've got a better wiring diagram like our old Datsun ones. Thanks so far, but there's still more to learn