I’m new to the forums and would appreciate any help. Just purchased a 2001 Ram 2500 Cummins.
It has a mild case of previous owner syndrome that I’m trying to correct. Most of the wiring issues have been pretty straightforward but there’s one in the engine bay that I need some advise on. It appears that the Org\Blk leaving the ECM has been tied directly to ground, effectively eliminating intake air heater relay 2. Anyone venture a guess on why someone would do this? seems like a hasty way to fix a heater problem.

 

After looking at the wiring diagram again this wire is actually coming from the PCM. It’s the TCC Solenoid Driver. Great. Just had the 47re rebuilt so now I’m wondering how this is affecting the tranny.

 

Do you get TCC engagement? TCC only drops RPM about 200 or so.

 

so I did more digging around and found that it’s a filter to help eliminate noise causing the TC to unlock/lock at speed. I guess one of the owners along the way had some issues. Appreciate the reply!