I would strongly suggest you remove door panel, diagnose with the door panel off, but you can remove the window switch from the door panel, you may just have alot of dirt, mold, and debrie. Maybe you could just start with a flat blade screwdriver to help clean the weather strip. Next, if your widow motor is a cable drive and is in fact moving some, its not the cable drive motor, it may be the track somehow got mis aliened, or jumped the track. Now thinking about it, I would give almost a 50% chance the window jumped the track, and you just need to remove door panel and get it back on the track. Hopefully thats what it is. It will cost you nothing but time.
Some vehicles have a very large metal plate that the regulator is attached to, this may inhibit your diagnoses. In that case I would remove the metal panel as a complete unit, the window will need to be un bolted to remove the "Stupid" metal panel covering the assy, you should be able to diagnose if you put in the time. I can do them in less than an hour start to finish.
I have been retired for 15 years, but I have not seen a window regulator system than was old school gear driven, they are pretty much "ALL" cable drive, thats why windows are very smooth compared to the 80's gear drive.
"IF your window does infact move at all, its not the regulator!" I personally don't recall having a modern window motor fail, the cable breaks! "Please, use an OE regulator if you have to replace it". If the cable is broken, there is no fixing it, must buy a new regulator assy!
I'm actually looking for a Motorcraft window lift motor right now, but it's not really being very clear it says passenger side part number 7T4Z-7823394-A but it doesn't tell me if that's the front or rear passenger side.. ?? I already have a Motorcraft window regulator in my cart at the moment on RockAuto.
You must verify front or rear, left or right, in all my days, I have never seen the same cable drive motor for front and rear. I also did not work on Fords, except my own F350, 7.3L diesels. I have had a few of them.