Multiple Front Control Module codes

[RootPC]

Hello, I have a 2013 Ram 1500 5.7l. I had a bunch of codes, took it to the dealership, they replaced the fuel pump (gauge wasn't reading, then would read high, then read correctly, then show empty again randomly) and said good to go. It was fine for about 2 weeks, then suddenly the same issue started happening again. I read the CEL codes and only saw the fuel pump for a while and had the dealership order another fuel pump to replace this one under warranty. But today I read the codes again and every code that showed up before is showing up again. Wondering where I should start? I have a feeling it's a ground or some connection somewhere, while the dealership thinks that it's the fuel pump... I don't understand why they would think that, unless someone can explain? Here's the blue driver report attached

 

[RootPC]

Looking more and more into possibly getting a new PCM but don't want to bite the bullet on that until I know for sure what's going on

 

[chri5k]

I am going to hazard a guess it is a wiring harness problem given the number of codes with "open" circuits. I would go through all of the wiring harness connectors starting with the big one that connects the engine bay with the interior. Then the ones connected to the PCM. For the PCM you may need to take it out of the vehicle to inspect / clean the connectors. Inspect the exterior for damaged or missing latches. Take them apart, inspect for water intrusion / corrosion, loose / pushed out terminal, clean with a good contact cleaner like DeoxIT, protect with a good contact protector like DeoxIT and reassemble. Ensure all connectors are fully seated and ensure latches are fully closed. Also inspect the harnesses for physical damage from road debris like rocks, sticks, improper lifting / jacking, etc.

The last one I actually experienced. A vehicle had multiple electrical issues. Inspection of the harness revealed an area where the harness had been smashed by a jack or lift. Whomever did it, just wrapped the harness with electrical tape. The tip off was a 6 inch long clean spot on the harness and tape that did not match the factory tape on the rest of the harness. Unwrapping the tape revealed multiple wires with their insulation smashed off, torn, etc. Took the better part of 8 hours labor to diagnose and repair the harness properly.