I recently purchased a 1989 Cadillac Coupe DeVille. This vehicle has 36,000 original miles on it which made me think that due to the fact that this car has barely been driven, this part has failed. Instead hearing a normal ignition chime when the vehicle is started, when the lights are left on with the car off and driver's door open or when the key is left in the ignition with the driver's door open, I hear nothing. Sometimes, I hear a very, very faint sound but only sometimes. Is the problem due to a faulty chime/tone box? Could it be a fuse or some sort of relay? I'm lost on this one completely.