Where is the power train module located

Passenger side firewall.... From memory > I think the ignition switch supplies 'power' to ASD .. However the PCM controls 'ground' circuit to ASD relay via white wire with black tracer .. Just can't quite remember which pin terminal number... IF no ASD relay 'ground' is confirmed, I may know a pretty simple fix for that! .. You'll just need some DC voltage knowledge.

The bigger dodge trucks of that era had a lot of voltage grounding issues. Just a hint, electrical labor is worth the $ on that setup