If I remember correctly, and if yours is the same as my '89 LTD, there is a metal track that runs in the middle of the underside of the drawer. Partway down the track are a couple of fairly small metal "wings" (?) that stick out and prevent the drawer from coming out. Squeeze the wings against the track (that releases the catch) as you pull the drawer out.
You can't see any of this since it is too low, you have to just feel along the track, find the pieces sticking out, then squeeze them in and pull out on the drawer.
Hope that makes sense!