1999 lincoln navigator rsx 3.5

I purchased a PKF1 from bypasskit.com, just wanted to make sure this module will work. On the ignition which wire is the RX and which is the TX?

Also what wire would the black wire on the PKF1 plug into on an rsx 3.5, thanks for all the help.

There should be a 4 pin plug next to the key cylinder.  Follow the type A plug picture.  What you can do is(with a DMM) ground the black lead and connect your red lead to the wire on the end of the 4 pin plug.  If it gives you a read when the ign is on and during crank then that is pin 1.  Now, connect your blue wire from the bypass to the 3rd pin on that plug and the green to the last 4th pin.  Connect the red wire from the bypass  to ign and the black to ground.  The other wire you would connect to your alarm system.  In this case I will explain that wire in general.  Look at the manual and look for an output wire that is ground while running or remote start.  Basically this wire gives a ground output whenever you try to remote start the vehicle.  After making that final connecting you must then program the bypass by simply putting a key in cylinder and turning to the on position.  Module now programmed.  Remote start and it should work now.  if that doesnt work then you may have wired the blue with the green wire backwards, so just swtich and program again.