2002 ford explorer 4w xlt?

Where is the 4w control module located I look in near the glove box there wires but it seem the old owner took it of. I believe if that the case that why I can't get my suv to engaging please help

Does your car actually HAVE 4WD capability? A lot of those little SUVs were built as TWO-WHEEL DRIVE vehicles, and if so, there never was a "4w controller". It's NOT something that a previous owner removed.