This is most likely a loose wiring connection. We need to start by going to the battery and making sure the terminals are clean and tight. Then start the engine and wiggle the battery cables to see if you can get the truck to shut off. Then move onto the major wiring harness that you see around the engine compartment specifically those coming off the PCM. Clearly we don't want to really manhandle the harnesses, just wiggle them to replicate the amount of movement they may have when you hit a bump.
Unfortunately there is not a much better way to try and find what is causing this. We basically just need to duplicate this in a controlled environment so that we can track down the problem area.
Let me know what you find with this and we can go from there. Thanks
Jul 9, 2020 at 12:43 PM
