Could be one of the door sensors causing this.
Could be the interior lamp switch which is activated by raising the outside door handle or pressing a code button on the electronic door lock control system.
I have a 1998 ford grand Marquis- and the problem is the air suspension light stays on- how to fix this problem
Have the codes read.
Why ? Just replace it.
why does my airbag light blink off and on on my 92 mercury gran marquis ls
You won't know until you get the code read.
check the bottom of the steering column
Fuse, loose connection, or the light switch. how do you remove the dashboard on a 94 mercury grand marque?
the switch for turning your lights on ie parking - low beam,pull it out for interior light dude....
Have vehicle scanned to determine the problem
The repair section on autozone.com explains how to change the light switch.
assuming you mean the light bulbs, see the answer to "how do you change turn signal lamps both front and rear on a 96 mercury grand marquis" right here in WikiAnswers.