The ground is on the driver's side of the dash, near the fuse panel behind the endpanel cover. There's several of them. You'll see a few little black plastic boxes, each with several wires going into it, and a single bolt holding it to the metal part of the dash. Undo that bolt, use sandpaper to clean up the mating surfaces, and bolt it back up...very simple. If they get bad enough, your whole car can go dead...I speak from experience
