My Taurus does it when the
key is in the ignition or the headlight switch isn't off.
He does this with our Dodge pickup that also has the audible alarm. He
accidentally turns on the cargo light which can't be seen due to the camper
shell (canopy for us in the PNW). He couldn't figure out why it was dinging
the first time it happened. I guess I'd better get the canopy wired so that
the cargo light switch powers up that light along with the one on the cab as
it is suppose to.
Kevin in Hillsboro Oregon
1983 300SD 284K miles, Ursula