I spliced into it with a wire tap and ran it in the truck, grounded to the seat frame, no change in rpm. When the converter decides itsgoing to lock sometimes (going up a hill) you can tell because if you tap the gas there's no 200 rpm jump. It's only at speeds around 45-60 where it will not lock, then on flat highway, you can tap the brakes and usually there's no rpm change so i verified its not even tring to lock up. on my way to work this morning, i tried holding up on the brake pedal because of the switch that releases the convertor on application of brakes. No real change either. Also, the black plastic on connector at trans was broken, so i pinned the wires directly to the ones coming from the tcc harness out of the trans, still no change.tcc is new.