Billy,
We had the same problem on our 2011 PC 2551. It turned out that the 5 Amp fuse had blown. The fuse is not in any fuse box. There are 4 fuses tucked behind the panel directly under the emergency brake release. To access the fuses, you remove the panel. In order to release the panel, there is a small plastic clip where the emergency brake cable goes through. You have to lift the cable and pull it toward the passenger side of the cab. You'll find wired in fuse holders that have rubber caps. Open the caps and check the fuses. Good luck. Hope this helps.
George