Your rear window could be a couple of things. It is probably either the switch itself or more than likely the relay for the rear window. Do a quick search on here and you can read about all the rear window issues and try to track it down.
Also go to this
link to get the FSM for the backdoor out of my Drop Box. the file is 10 pages long. If it references you to a page not included, send me a PM and I will get it to you.
As for the 4wd issues I will have to let someone with a little more knowledge of the system but I would think you have a sensor bad somewhere.