I had a look at this today, and found the best way to fix it. Under the dash, just above ur right knee is 2 small black boxes. One is screwed to the other, and they both have wired running to them. I disconnected the big connector, and the buzzing stopped, but so did my electric windows . so I reconnected it and disconnected the smaller one, and WOOHOO!! No buzzing, but I did have windows!! This is also good for when u have just tinted ur windows. disconnect it, so u dont accidently knock it!
Hope this helps, i've checked all my electronics and it all works fine!