[Richard and Rhonda]

Thanks Michael,

To answer your question. the single gauge reads between 100 and 120. It does not move when the tag axle switch is activated.

Here is the picture I am getting so far. Activating that switch causes a temporary change in the tag axle air bag pressure. I am trying to confirm that my assumption is correct. Because if it is not then dumping or increasing air in the bags changes the weight distribution and I have no idea what is going on.

If my assumption is correct then I need to look for circuitry/plumbing that controls the air bag pressure while the switch is in the default (middle) position.

On your coach, do you get a warning light or chime when you dump the tag pressure?