(Follow up)Was able to find the brain to the Faria gauges under the coach center bay I swapped airlines from rear to front front to rear and the pressure is good on my Foward system on the rear gage, but the system still shows no indication of pressure on the fwd gage the low air alarm is still going off constantly I also found a separate wire p11 pin 4 input for the low air pressure, but not sure where it comes from yet. i’m thinking of swapping the gauges to see if it’s a gauge issue or a brain issue also to see if you can open the brain and test transducers which I’m assuming are inside the box