I have a 2022 F250 Tremor and I was on a road trip and towards the end of the trip my dash lit up. Abs, steering assist, 911 not available. Serious canbus communication error somewhere. Truck drives and shifts fine. Its just the auxiliary stuff that is freaking out. I thought it was the wheel speed sensors. Swapped them. Didnt fix it. Then i thought it was the water in fuel sensor. The truck ran ok for one day when i swapped the wheel speed sensors but it showed water in fuel light. So i swapped the wif sensor. Still christmas tree. I started pin checking. I had 8.2 ohms from pin 14 on the obd to ground and 8.2 from pin 6 to pin 4, ground. I had spilled a whole coffee into my console during the trip so i pulled the console, cleaned the connectors under there really good. Got rid of the can high and low to ground but i was only reading 120 ohms from pin 6 to 14. With the pcm and abs module plugged in, I should be reading 60 ohms for the two resistors across 6 and 14. Then i thought the gateway module maybe got fried when i spilled the coffee. I pulled it, noticed that the connector was touchy. When i pressed the connector a certain way, the multimeter would go OL so i got a new gwm. Plugged it in and still only get 120 ohms. Somewhere along the line, there is no handshake between the abs module where one resistor is and the pcm, where the other resistor is. Can anyone point me in the right direction to start shooting pins? I have alldata and can see the wiring diagrams, but I dont know what the connector numbers are or where they are located. There is obviously a break somewhere in the harness that i cannot seem to locate. Thanks!

 

I've been chasing similar gremlins, and this is a common issue on these trucks.
For mine, most of the issues stem from the connector on the inside frame of the receiver hitch, it was getting moisture intrusion or had a wire(s) exposed that was getting wet and interrupting communication with a number of different modules.
For some strange reason, some brilliant ford engineer thought that routing all of those module wires all the way to the back of the truck was a good idea.
I went many rounds with mine, took the connector apart and filled it with dielectric grease, didn't help.
I finally found out that WD40 would disperse the moisture and it would run like new after I sprayed it all over that plug and the wires running to and from the connector, but when it dried up and got wet again it croaked again.
So, next I cleaned all the wires and connector with electrical contact cleaner, then after that dried, I sprayed about 6 coats of that clear Flex Seal rubberized coating all over that connector plug and as far up the wires as I could easily reach, and it seems to have worked pretty well.

 

Well that's worth a try. I will pull that plug tomorrow, clean it up and see what happens before I call shops for a diagnostic check. Thanks!

 

https://www.ford-trucks.com/forums/1...tors-kind.html

 

I responded to the other poster and I had the same issue on my 2017 F350. That plug and the others alonmgside the spare tire are notorious for water intrusion. I pulled all of the plugs apart, blew them out with my compressor, packed them with dielectric grease and then took a freezer bag, cut off the "yellow and blue make green" clousre and wrapped it around the harness and ziptied both ends around the plug. Never an issue since then. But I also did that to every plug that is down by the spare tire.

 

Be careful with the bag around the terminal. At least check it. I did the exact same thing for a different harness terminal end and wrapped the bag tight and did two zip ties super tight around the bag and wire harness... when I looked at the bag a few weeks later, there was water in the bag.

 

bro that was it. That damn plug. I cant believe i went through all that for a plug in the back of the truck. I had harnesses apart, and was shooting pins for days. That is unbelievable. I took your advice and shot it with some flex seal. I also wrapped the plugs in silicone tape to full seal the area. That is an incredible design flaw for a “super duty off road” truck. Thank you so much for the suggestion. Im still kind of in shock and expecting it to take a **** in me any second.

 

Glad it worked out for you!