92 Taurus Door Chime

[rgp]

This week I purchased a 92 Taurus. The chime sounds whenever the driver door is open. I am the 3rd owner. The fellow I bought it from says it's always been that way. I don't think it should be. There's a little switch in the ignition key/lock mechanism that closes when the key is inserted. The switch is normally-open (key removed). I took the mechanism out and examined it. It's working properly (it is not stuck closed). As far as I know, there's only two things that should sound the chime, exiting with the head lights on and/or exiting with the key in the ignition switch.
I believe that most of these normally-open switches close and provide continuity to electrical chassis ground. Am I correct?
Is there wiring diagrams available that will show me where and which wires I can probe to see if they are shorted to chassis ground?
Thanks for your help.

[Alex_Perry]

fiddle with the ignition cylinder in the steering column. every ford over five years does this. it gets loose inside there, and sets the chime off.

[twilightsable99]

find the power to the chime and cut it. i hate door chimes. i wish they would commit mass-suicide.