I hope you have found the code by now if not I just found out where to look for the code "The door code is located in three places. 1-on the security code card in the owner's smanual packet, 2-In the internal memory of the module(accessed by a scan tool) and 3- If you remove the left trim cover on the left rear quarter trim panel in the cargo area, and shine a flashlight behind the panel in the direction of the seating area, you will see the module. There is a sticker on it with the 5 digit code on the module itself." (
http://www.faqfarm.com/Q/How_do_you_..._Ford_Explorer)
Hope this helps good luck
