More than likely, you'll just need to clean the contacts. The switch is easily taken apart. Just be careful not to let the little bits and pieces get lost -- especially in the "Lock" mechanism. The lock function is controlled by a little piece of wire that looks like a staple. Don't lose it or you'll need to find a similar piece of wire (maybe a staple WILL work
) to fix it. All the windows, with the exception of the Driver's is controlled by copper contacts. Get some zero residue contact cleaner from Radio Shack, or, use a pencil eraser to clean them.