It's super easy. The
OBDLink EX is the cable I use. Make sure you have at least version 2.3.65 of Forscan for the 2025 trucks. When you first connect, you should get a prompt to update the database or something along those lines. If it still doesn't recognize your truck at that point, you may have to wait 24hrs and try again. I ended up having to wait. Once you're connected, go into the modules tab:
APIM plain text - enable "Keypad Hardware Input" - write changes
BCM plain text - enable "Door Keypad Code" - write changes
From here, you can go into the truck's settings on the main screen and configure your own code. You'll need the factory code mentioned above for this step.
Before you do anything in Forscan, I would highly recommend downloading your
as-built data from Ford (you can get that later in the build process) as well as manually exporting the as-built data from each module in your truck. Took about 10 minutes to back everything up.
Hope that helps. Feel free to @ me or send a DM if you get stuck.