Your plan sounds good. I would plan on replacing the SJB myself, If it's the style Ford commonly used you are going to discover they used press in terminals and wires instead of circuit traces and soldered connections and it doesn't take much to make them corrode or the wires to fail. With the number of fuses, you have out it is probably a couple of circuits. There are videos online about the way they are made and repaired.
Scan tool wise I have a few that work to do this type of repair. Most of them do this in the same way, you plug them in, pick the system you are working on and then go into the module itself and then follow the prompts, in this case it's to plug in the tool, read the as built data, then remove the module. Install the replacement and use the tool to write the as built data into that module. My latest "toy" is this one. So far it seems capable.
https://mythinkcar.com/diagnostic-tools/5-49-thinktool-pro-series#/27-version-thinktool_pros
It's a bit much for a DIYer unless you want to be able to handle pretty much any diagnostic item on the vehicles around you.
I tend to refuse working on flood cars because you chase endless electrical problems in them. I got a "great deal" on a Buick flood car years ago. Ended up gutting the interior and taking every connector in it apart to clean and add dielectric grease to them, then doing the same to the rest of the harness under the hood. That was before all the modules took over.
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Thursday, April 13th, 2023 AT 10:52 PM