Most sensor problems are they read full when empty. Mine is the opposite. Tank is 2/3 to full and sensor panel reads empty. I checked the wiring on the panel and all seems well. I have a 2010 Salem by...
No way to cross wires at panel, all wires are harnesses and plug in. Problem seems to be only black tank for now. I did notice two weeks ago the lights randomly flash when the black tank button was pushed.