I got 2014
Great dane Champion.My trailer wont air up at all . No air bags or release the brakes either. It has new abs valve , new tank, and service valve. The only one i havent replaced is the one the side. Its an ht 1243 tank.
I'd be looking for a kinked line or blockage from the gladhand to the emergency valve. Does the gladhand have screens? Maybe a nest of bugs is not uncommon. If the tanks not filling either the line is plugged or the valve is.