For the past two weeks, my rear window wouldn't go down, the rear defroster wouldn't go on, and the rear wiper and fluid wouldn't work. I check all of the fuses but everything looked ok. I took it to the dealership today, and they told me to try two things:
1. Make sure your rear wiper is in the proper neutral position.
2. Try putting your window up.
The dealer told me that if the window is almost up, but not quite all of the way that it won't go down. If it's not all the way up, the defroster won't work and the wiper won't work because the truck thinks that the window is down.
I went and played with the positioning of the wiper, and then used the button to make sure the window was all the way up (which it seemed to be), and now they all work!
Just wanted to let y'all know how to fix this if you ever have this problem.
Bingo!! I just went through same. Sprayed electronic cleaner into switch, checked fuse and relay, all ok. Hmm, I says, better check the forum. Turns out the window was down just slightly. I put it down and up, ran the rear wiper and turned it off mid-cycle to make sure it parked neutral and bingo, the defroster works fine! It was the first morning I needed it and had to hunt down a scraper. Thanks for the tip!