...rear).? I noticed that when I open/close the driver's side window, there is a loud "click" I'm sure is a relay, under the dash. It seems to be coming from a silver box, I think is called the front power control unit (or something to that effect). BUT, when I do either passenger side window, I don't hear that same relay. The lights do dim on the car when you press the window button, so I know it's got power to the button. Any thoughts?