Thanks everyone.
The 2015 Ford Explorer does not have a factory trailer brake controller. With the Tow package you get the oil cooler, 3.65 axle ratio gearing, class 3 hitch (5000/500 lbs), and a 4 way/ 7 way plug.
Ford does not list the trailer brake controller harness pigtail as an accessory. My 2008 Explorer Sport Trac had this in the glove box when the Explorer was delivered to me. This 2015 was missing this harness pigtail in the glove box or anywhere else.
I'll be talking to the manager about the omission of the harness upon delivery and see what can be done.
Thanks everyone.
BTW, here's some pics.
