Quote Originally Posted by steveo View Post
you need serial data and ground, nothing else.
i'll just quote myself since it's still the truth. everything comes over the serial line. the serial line is only one pin. just connect it to your aldl cable. if it doesn't work something is wrong in your cable, ecm, or wiring. that field service enable wire isnt' something anyone uses. everything goes over that one pin. everything. every single piece of communication. trouble codes. datalogging. programming. all of it. one pin.

i do feel like i tell you something and you don't believe me until i tell you exactly the same thing a dozen other ways so i do hope this gets through somehow