I have an 06 e250 5.4 with a p0743 FCC circuit failure. I've replaced to solonoid and inter harness and problem still persists . Can anyone tell me which pin and wire color on the ecm controls the tcc solonoid? Thank you

 

https://www.obd-codes.com/p0743

If you want a diagram get a copy of the book from Faxon Auto Literature

2006 Ford Econoline Van & Club Wagon Wiring Diagram Manual Original