2nd air gauge not working

[trucklogger2]

So,you have lots of air on both sides in the tanks,right and you don't have the trailerhooked up or at least charged,so you isolate your truck.is it possible for you service the air dyer? Governors are like $12 or so and filters under $100 anyway,i can' t remember. But the point is air dryers and related parts sure can act weird. If possible go around your truck air valves with soapy water. Wirh a close eye on your quick connect valve. Hope this helps.