Quote:
Originally posted by Mountain Main
You are all most done but this is a very curcial part of the swap. If you hook up to much power to the Neutral Drive Switch it will fry the computer and the Map. You can keep the Automatic Transmission Computer in your car but their is some wiring changes. It has to do with pin number 30 of the computer harness. If I remember right the NDS is uses a 5 volt reference. Don't use 12 volts it will fry the computer.
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You're close. If you retain the auto ECM, then it doesn't matter, but if you install the ECM from a manual transmission Mustang, so you don't have any lag in the timing during your shifts, you need to clip the wire that goes to ECM pin 30. The auto safety switch works by sending voltage through that circuit, and the manual does not, therefor applying voltage to that pin in a manual ECM will give it voltage when and where it really doesn't want it. A fried ECM will be the result.
If you still have the original ECM, then don't worry about it.
As far as the neutral safety switch, take the red/light blue wire and the white/pink wire from that four wire harness that went to the old tranny, and splice them together. Take the other two wires (should be black/pink, and pink/orange (or pink/yellow, I can't remember)), and attach them to the reverse light switch in your replacement tranny. You can do it the way that was already mentioned, or you can go to a junk yard, and clip the two wire connector from a Mustang there, and splice those two wires in to it, and then plug it into the new tranny.
Take care,
~Chris