I have a few questions.. first you have a 2012 truck, and a wiring harness for a 2009 and yet you are posting in a 1994-2001 (2nd Gen) forum.
Secondly, where did you get your part number for your wiring adapter?
I found the partnumber by TowReady (same company that makes the Activator II #5500) to be 22293. This adapter plugs directly into your factory wiring harness under the left side of the dash. INSTALLATION MANUAL
Dodge lied to you 2011-2012 are the same harness, and 2013-2014 are the same harness. So depending on Date of Manufacture, you might need a 2013 Harness.
I hope this helped out some.