FM9694
Newbie
Just to get your opinion as well, to confirm this I followed your steps of depin black / tan wire from PCM and tested with truck on and got 0v. I then turned truck off and tested the tested the now free black / tans wire resistance to ground which it showed continuity, thus diagnosing uncontrolled grounding of this wire. When transmission harness was unplugged, continuity was gone, demonstrating that the uncontrolled ground was somewhere from trans connector to the solenoid itself. New harness on the way and thank you so much again for your help. Will update to confirm fixOutstanding! Sincerely appreciate your continued status updates. FWIW here's an interesting
illustration of the wiring harness to the internal transmission solenoids for those reading
this thread and trying to picture the physical implementation of this circuit path:
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Looking forward to you getting a good new harness installed and solving this
difficult stalling symptom.
Nice job staying with it. (!)