Here's one that has everyone I know baffled. When I turn the ignition off on my '98 Deville, the power stays on all the accessories as if the key is in the accessory position even though the key is out, and with the car doors open. (Usually everything goes off when the doors are opened.) Anyway, my local mechanic has been working on it for a week now. He thinks maybe some type of computer needs to be replaced? Any suggestions would be greatly appreciated!