The gauge is supposed to read the accessory tank on that vintage of bus, which is the tank at the front beside the driver. If you want to fill the bus correctly without running the engine, add air to the ping tank at the back of the bus, passenger side, there should be a valve there too. The low air warning runs off the accessory tank, so it will not shut off until the bus pressure is up properly.Brian
Ignore me if you know already, but there is a little lever with a red handle under the dash to the right of the steering wheel that turns the door latch on and off. Up, toward you, the door latch claw will suck the door tight. Down will release it.JC
Paul, this just dawned on me: on my 5C, the ignition key has to be on for the door latch to operate. Worth a try on yours...JC
I'm talking about the master switch on the dash.