Butcher! So close yet so far....... I was hoping you were going to completely tear that housing down since it is a 18yr. mystery. It seems no one has Dissected one since implementation and the massive Recall. There are a few plastic parts in the main Housing barrel between the Key cylinder and the Ignition switch. That is where the Constant Key Chime Fault resides. Mine is actually broken into 2 pieces and binds inward toward the Ign. Switch making it think the key is always in the ignition. ***As for removing the Ignition switch, the Key cylinder has to be in the Run position or removed. In the Off position the Switch is locked to the housing.