it can be done through the factory radio if you still have it. turn the radio off, hold down the TUNE button for about 5 or 6 seconds or until you see the display change. then keep hitting SEEK until you see FOB HORN. once you find it, hit the button with a 1 on it until you see OFF. then hit TUNE one more time and you should see this *OFF. this means you are good to go. just turn the radio back on and ride out.