Remove the panel on your rear door... Turn the defroster on and check for power at the plug... If your plug has come off of your window which might have happened... You can go to a parts store and buy that glue crap which last you a month or so... Or you can get a mini torch and some solder and solder the terminals back on your window, which is a more permanent solution... I soldered mine back on 3 years ago and still going strong.