Is there any prventative maintaince that should be done to the tailgate and or window? Lube piviot points, slides or what ever you have under that cover. I guess when this is all over there should not be a broken tailgate around.
Study the elecrical specs.
Then remove the entire harness, fix faulty wires. Even the working tailgates typically have exposed wires between the body and tailgate.
Learn how to repair wire correctly: http://fordfuelinjection.com/how2solder.html
I have posted about bent latches, which can be bent back, and I assume you could weld in re-enforments
I took out the main center latch, and cut off the bottom rod, which tells the latch when the window is down.