Hello folks - On the breaker board, there is the switch that powers on the waste system and then the indicator which shows how full the holding tank is. My switch is not lighting up when I power it on (little light on the switch itself - but that could just be out). I am getting the "power" light on the fill indicator indicator itself. But I'm not getting the actual gauge to light up showing the fill level of the holding tank. The message underneath all of this says "with switch on - indicator off - check seacock." Does anybody know which seacock this is referring to?The only seacock I can find that might be relevant is the one which would allow waste to be flushed directly into the water. That seacock at the bottomside thru hull which, for me is closed and zip-tied in that position. I'm actually not even sure what "indicator" is referring to...the power light or the fill level gauge. Thanks.