Hello, Our 2012 C2s came with exhaust brakes.It works well so we have been trying to get them working on our 09 C2s.Freightliner gave us new switches and a new reference parameter which we added,but we cannot get the switch and parameter to communicate.We get a code for missing switch.We can go in the template area and turn the switch on and off, but the BHM won't recognize it .Anybody have experience with this.Our Bluebird buses were just a matter of adding a switch and enabling the VGT brake with Cummins insite. Any help would be appreciated. Thanks