I was changing my radio in my Taurus. I bought the special dash kit and everything for it. We got it hooked up and went to turn it on to check it out, but when we did the radio wouldn't come on. So we figured there was something wrong with the radio until we discovered the windows wouldnt roll down, the windshield wipers wont work, the power locks dont work, along with the interior lights, trunk release, and speedometer. So we checked the fuses and they we're all fine. We unplugged the negative on the battery for about 15 minutes and tryed again, but it still isnt working. Do you have any idea what happened or how to fix it?