Start with basics. Make sure all your drain ports are closed. If so. Ensure both valves on the wet tank are open. One is on the front, one is on the top side. Those are primary and secondary valves. They can get closed if they are on their way out. If they are Open, Remove the line coming from the drivers frame rail into the air dryer. If air is present, forceful air, then check at the hose going INTO the wet tank. and see if you have air there. If you have No air coming from the frame rail into the air dryer then you need to remove the little line off the passengers side of the air dryer and blow back thru it. This signal wire can have the unloader in the compressor turned off. If Yes then you need to check to ensure the amount of pressure there is. So you will have to rig up a gauge to be able to check air in the line.Thank you, any suggestions on whyits not bulding air i checked the dryer its not open.
Where in Mississippi are you?