1999 mercury sable . 3 of 4 door locks will not unlock when using the remote .

What is your question?

The door locks ( sitting in view at the top of door ) move a little but do not jump up to allow the door to open. The key will not turn in any of the doors . It only works in the ignition and the trunk .

What makes this problem better or worse?

Nothing .

How long has your 1999 Mercury Sable had this problem?

Not long after I bought the car used .