[Richard]

I can tell you about my coach, your's may be different. At the time mine was built, Newell did not use a regulator to guarantee a minimum pressure in the tag air bags. I found this out the hard way. I dumped the air in the tags to make a sharp turn, and forgot to return the switch to the middle position. Shortly, the coach sat down on the fender flares because the air bags for the drive would not support the coach without the tags.