[Don]

It’s probably the Pressure switch in the steering compartment Chuck that is nothing more than a well control pressure switch. You can verify it’s the switch by taking the cover off and when the air pressure gets to the cut-off point, could be anywhere from 90 – 120 lbs depending on the setting and you’ll see the points do not disconnect as they should. Be careful, it’s 120 volt. I’ve had to replace them on several of my buses including this one.