I have the same thing. If both tanks are on, they both will show green. When one tank empty the gauge will turn red in the direction of the arrow on the knob of the empty tank.....to test turn only one tank on, and bleed the hose off on the off tank, the gauge will change colors...
The arrow on the gauge is your primary tank, When switch to that direction. If empty the gauge will switch to other tank automatically if 2nd tank is on, gauge will turn,red
Green means full....red means empty or off.
You have to bleed lines off to show red.
I hope I did not confuse you any more than I have.
2014 cedar creek 36ckts
2014 Chevy 3500 1 ton crew cab 4x4 long bed.
Sent from my iPad using Forest River Forums