I have a 2008 F-350 long bed crew cab diesel 6.4. I have the notice on the dash saying "trailer brake module fault" and there is no power to the controller. (verified with my meter). I have power to the fuse 5 in the engine bay and the fuse is good...... I also still have charge power to the 7pin trailer plug so I know the fuse and relay in the cab are working. it also appears to have lost the ground as I can't get continuity to ground from the plug to the battery. Is there a connector between the plug for the back of the controller and the rest of the harness? I have +12 volts on the brake signal when the pedal is pressed so in know some of the wires are connected to the plug..... Help!!! I'm pulling my hair out here!