My 1998 Lincoln Continental always thinks a key is in the ignition, even when the key is in my hand. There is a sensor which tests to see if a key is in the ignition lock switch. Unfortunately, this sensor always thinks the key is in the ignition. So when I open the car door to get in, the warning chime makes a lot of noise. Also I can't lock the car doors any more. This issue started after I removed the ignition lock cylinder and put it back in, so apparently I did something wrong, although I have no idea what. The car is drivable, so at least I got that part right. If you could help me fix my nice old car, that would be really nice.