Isn't there any aftermarket harness that uses the OEM connections found on the underside of the receiver hitch?
There is a factory harness that uses a connector that breaks out of the harness somewhere under the bed. For some reason not all of the superdutys have that connector so you have to use the aftermarket harness that tee's off of the back of the connector by the hitch. My truck is one that does not have the factory connector for the in-bed receptacle so I used the aftermarket one and have never had a problem with it.
2012 F250 XLT
6.7 CCSB 4X4 Sterling Grey, B&W Turnover Goosenech Hitch, Air Lift LoadLifter 5000, 50 gallon Transfer Flow replacement tank, Weather Tech mats