Random DTCs

[JasonATL]

I have a 2021 Job 1 and from the help here have gotten BC functioning along with many other updates since I bought it. I started getting the Trailer Brake Module Fault when starting the truck. Then the other night the automatic headlights weren’t working. After I cycled the engineer they came back. Then the next day did it again and now I don’t see the headlight with the A icon in the dash. Hooked it up this afternoon to try and see what is going on and have DTCs across a bunch of modules now which fail to reset.

My VIN is 1FTFW1CD5MFB75327 if anyone can look anything up to help me out. I’m trying to get FDRS to login once Windows finished updates to see what it tells me.

Thanks

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[JasonATL]

Update:
In FDRS I cleared and retested. Now I have BCM failures for lost comms with Trailer Brake Control Module and Lighting Control Module Rear B. Also IPC lost comms with Trailer Brake Control Module. The others I had in OCSM, DSM, HCM and BCM all cleared now.

 

[CoCamper]

99% chance you have a bad trailer brake module. See my thread here https://www.f150gen14.com/forum/threads/full-truck-reboot-while-driving.14378/post-392312

First unplug the trailer brake module and see if the DTCs stop showing up. You'll get a trailer brake module on start up, but after that, the random errors should stop.

If that fixes it, order a new module, they're pretty cheap.

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