[boxpin]

Thanks for the schematic but its still not helping.

I did adjust SC and now I am in the upper range of bars on the scale.

Here is the problem now. Getting the system to shut off with the gauge button.
The hfs-1 is stand alone right now. The system is triggered by manifold pressure and that runs the pump under the hood. The only wire that makes its way into the cab is a blue and a violet wire. One connects to a switched 12v and the other is not being used. So if the hfs-1 has power, it works.

The gauge is connected to the DDS-3 box along with the flow sensor and float sensor. They all seem to work correctly. The only way I can see to get the system to shut off with the gauge button is for the DDS-3 box to give and take away power to the switched 12v. I dont see how that is going to happen the way its currently run. What are some other options?