It may be worth performing the continuity check right back at the 40-pin transmission ECU connector as well, just to ensure that the wiring is sound all the way to the inhibitor switch. These are the relevant pins :

31 = +ve
34 = L1
24 = L2
14 = L3
4 = L4

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Phil

Getting closer but not quite there
 

It seems like I'm getting closer to fixing my truck, but it still feels like i'm miles away.
After a lot of troubleshooting and diagnosing different things, we finally narrow part of the problem down to the TCM/transmission control module. I sent it off to have it diagnosed and fixed. The transmission neutral safety switch was also failed and then replaced. My transmission is still staying in Trans Fail-safe mode. I have a battery light that stays on my instrument cluster. I read in a another gentleman's post that his instrument cluster was the culprit. I have ATC m code coming up.
But i'm not sure the transmission has failed or is the culprit of the trans fail problem. I will attach the diagnostic report from my scanner. I had voltage tested and everything is charging correctly. The battery is brand new, but I have this crazy battery light that will not go off. It is my understanding that any problems in the charging system can create a trans fail safe condition code. We have a speedometer instrument, cluster repair shop in my city, and their advice was to swap out a good known cluster with the same part number before having them to
Do a repair that may or may not fix the battery light issue. I'm trying to get additional insight. 4 help that may get me closer to resolving this issue. Thanks in advance.

It ended up good being the speedometer.
 

After a lot of troubleshooting and parts being replaced, we finally narrowed the problem down to a faulty speedometer.
We were really literally at our wit's end, and we were about to throw our in the towel, But we finally saw a post that talked about that the speedormeter. And it's relationship to other modules in the vehicle. The instrument cluster does what's called a handshake with the dme and the tcm as well as other components in order to relay A functionality.status. Any faults in any of these modules Can and will trigger what I have been experiencing. After replacing battery alternator, transmission,control module, neutral safety switch, I wasn't any closer to having a normally operating vehicle. A rogue battery Light was displaying on the instrument cluster and I couldn't figure out what was going on. After sending off the instrument cluster to be repaired. I am finally relieved to say that I have. And normally operating vehicle. Hope this helps

Awesome! Thanks for following up and glad you got it fixed finally :thumbup: