2001 Dodge Ram 1500 4×4 5.2L v8

Check engine light, giving a p0748 code. I have pulled the pan, visually checked the Gov Press Solenoid, and the wiring harness. Did this at a friends house and didn’t have a continuity tester or multimeter at the time so while pan was pulled didn’t get a chance to check the internal wiring harness or solenoid with testers I am wondering. There is an 8 pin connector that plugs into transmission. I read somewhere that the #1 pin socket should be carrying voltage? It currently is not. Do you have a wiring harness diagram for the exterior of transmission. I have also ruled out the trans control relay. The relay only not the circuit. I’ve changed with clean ATF , any help would be greatly appreciated. Oh the truck starts in limp mode 2nd gear. No O/D yada yada yada