Have you turned the wiper on and used a DVOM to see if you’re getting voltage? If you are also check your ground connections in the gate / rear of vehicle. If one came loose or is dirty you’ll get random things that work erratically or not at all.
i can pull a Ford OEM wiring diagram if you need it. Could also be the start of a BCM failure but not likely.
I would check voltage and grounds before going any further. Could have a pinched wire somewhere, etc..