I have a 2006 f150 King Ranch with a factory tow package. I have a brake controller from my previous f150 wired into the factory pigtail and connected to the plug under the dash. All lights on the trailer work, but the electric brakes don't. I pulled out my tester and did not have power to the EB pin at the hitch, so I went under the dash and started testing at the harness plug. No power to the EB pin, but I have power to the battery lead and power to the brake lamp pin. The factory relay is installed in the fuse box. What gives?? Do I have a bad relay? Any help is appreciated. Thanks.

Kevin