No pressure reading on TAG suspension

[92landyacht]

Last trip out I noticed that the pressure gauge showing the TAG axle pressure never got above 10psi.

Any ideas on where to start looking for this? The air horns were still working and they run off of the same compressor and need more then 50psi to blow so I'm sure the compressor was building pressure.

[92landyacht]

Problem resolved. Seems like the 1/8" capillary tube that runs to the gauge had a small hole in it from rubbing over the years. Used a 1/8" press on union to do the repair. Just cut the hose at the hole and inserted the union. Started up the compressor and pressure rose to about 70psi. Shut it down and not a sign of a leak anywhere. Over night the pressure dropped about 5psi. Looks like the problem is resolved.