One problem related to door has been reported for the 1998 Ford Taurus. The most recently reported issues are listed below.
Problem: door-ajar warning lamp on; all doors checked, including tailgate; all are closed firmly (not slammed shut). Interior overhead lamp and underdash lights do not go out consistently after the engine's started and put into gear. Appears that random order of check/re-close doors; lock and unlock doors and tailgate by smartkey or manually; set and release emergency brake. There's no consistent pattern to getting the lights turned off. Gervais Ford suggests that it's one of the contact switches, usually the driver-side, that contributes to this, rather than a relay or timer; but that they have to catch it in the act to properly diagnose it. Really aggravating to have to pull the fuse in order to avoid running down the battery in the winter, until we can get it to gervais's shop. Dt.