I have a 2001 Ford Explorer sport trac and the module is located behind the front passengers side panel. I would have to believe that the 2002 Explorer would be the same.
Could be the 4x4 Control Module.
no and no
The control trac four wheel drive system has auto , high , and low settings on the 1999 Ford Explorer
The 2003 Ford Explorer has rear wheel drive.
The 2005 Ford Explorer has rear wheel drive.
The 2012 Ford Explorer has front wheel drive.
The 2013 Ford Explorer has front wheel drive.
The 2011 Ford Explorer has front wheel drive.
The 2010 Ford Explorer has rear wheel drive.
The 2007 Ford Explorer has rear wheel drive.
The 2002 Ford Explorer has rear wheel drive.
The 2006 Ford Explorer has rear wheel drive.