This is my solution to knowing the status of my on board air system and ARB Locker. I mounted this gauge pod from the roof of the Sub, at the proper angle so all I have to do is look up to my right and I can see it very clearly. The gauge on the left is my regulated tank pressure, I also have a gauge on the regulator located under the hood. The light above this gauge tells me the compressor has power to it and is ready to run if the tank pressure drops below 125 PSI. The gauge in the middle tells me the rear ARB air pressure, the light above it tells me the ARB solenoid has power and that it has opened. The gauge on the right is my pressure in the twin 5 gallon tanks under the truck, the light above this gauge indicates that the compressor clutch has kicked in and the compressor is running. I have a floor mounted dimmer switch I use my left foot to turn on and off the ARB, I found this much nicer to use then the rocker switch that came with the ARB, I never have to look for the switch, it is so super simple to install and operate. I also have a switch that turns the compressor on, without activating the ARB, actually I used a relay to lock out the locker. I left intact the capability for the truck to increase idle speed when the compressor kicks in, since I aced the factory A/C, all I had to do for this was to tie into the factory harness, this comes in handy when airing the tires back up. I will be installing another gauge pod with another air gauge for the front ARB, and will locate it behind the current gauge pod. This my first attempt on any type of write up, I hope this makes sense. I failed to mention the fact that I am not using ARB compressors, I am using A York, since I am at it, I have a air coupling on the front of the truck that has regulated air pressure to it 95 PSI, and one in the rear of the truck that has unregulated air pressure to it, so it is the same pressure as to whatever is in the tanks at the time, between 125 PSI and 150 PSI.