My Lonestar’s suspension won’t inflate

Here was the situation to begin with. I had the suspension dump switch flashing at me as it would in dump setting in either position but the bags stayed inflated. A problem I could live with, just couldn’t dump the air but better than the opposite problem. It was like this for months. I’d removed the toggles and tried to change setting by pushing the little micro buttons inside the circuit panel. No change no matter which I pressed, the green light continued to flash. So I figured I needed a new circuit box and picked one up. Ride with it a couple months then finally got around to replacing the old one a couple days ago. After carefully removing all three switches and all six bulbs and putting them in the new circuit panel I was pleased to see the lights lit when suppose to be lit and went off when switched in the other setting. In this case the suspension setting. Now, with it switched to dump let’s go back and see if it’s dumping the air bags. Pressed the tie of my boot into a bag, cool! It’s deflated. I switched it to suspension and it’s still deflated. Rats!
For those if you that ever went down the road with deflated bags and heard the horrible sounds coming through the floor when the drive line isn’t mostly straight you know this is worse than having bags that won’t inflate.
I removed the new circuit panel, put all the bulbs and toggle switches back in the old one hoping I’d return to the former state (filled bags and a flashing switch) but no, it’s same status as I have since replacing it with the new one. It lights up in dump and goes off in suspension but the bags won’t inflate. There’s no sound of air leaking anywhere. It’s just not telling whatever that electric circuit is suppose to tell to pour the air to the leveling valve.
Any suggestions that might help me resolve this problem is welcome View attachment 477508 View attachment 477508 View attachment 477508 View attachment 477510 View attachment 477510

 

I’m not equipped to do more than change the switch pack. I wouldn’t know what the solenoid looks like or how to test it if I did. It just baffles me how changing something unplugged from the rest of the truck completely changes the reaction that has been the status quo for months even when I replace the new switch pack back to the original switch pack. Time to take to the professionals I reckon

 

I hear ya. Still perplexed why for 6-8 months I ride it out flashing as if it’s in dump no matter the switch position yet bags stayed inflated all those months unless I’d pull the rod out of the rubber yoke on the leveling valve the rare occasions I had to lower the fifth wheel. (I just drove out from under trailers l and drove under em rather than drop the tractor on most occasion.) and all I did was change out the switch panel and the solenoid unsticks in the opposite mode? Maybe. Another guy that owns a 6 bay diesel shop in Houston has a hunch the real source of my problem is a solenoid or worse case the body control module. Modern technology is great until it sucks