As previously stated the noisy Rear Window is an issue with the Window Regulator.
I had a problem with both Rear Window Regulators being bent.
http://www.peachparts.com/shopforum/showthread.php?t=254722&highlight=Extreme
While it does sound like a Wire issue where the Door Hinges; the Window Switches have also been known to work intermittently (burned contacts inside can often be cleaned/scraped).