So, here's the deal, my fresh water tank reads always full, my grey water tank always reads 2/3rds and my black water tank, always reads empty. The LP and Battery readings are fine. This is a recent occurrence after driving over a few hundred miles of crappy roads.I pulled the sensor panel and found 9 wires attach to it. It would appear 2 wires are ground and +12v wires. Another 1 for the LP sensor. I presume the battery level is read via the +12v line. That leaves 6 wires for sensing the 12 wires for the 3 liquid tank sensors.That doesn't compute....thus, I presume there is a separate "switch" or relay where all 3 liquid tanks attach and based on which button you push, the relay feeds the appropriate tank leads to the sensor panel. Can anyone verify that? And does anyone know where this relay or switch may be installed? Thanks in advance for any information!Don
As I understand how these work there is a sensor at each level with a resistor between them. The level is determined by the resistance of the circuit.I think I would be looking at the wires on the tanks to see if they are still all intact.These sensors are not particularly accurate but what Donc13 reports seems more as if something has changed not just inaccurate. He also reports rough road so maybe some of the wires on the tanks came loose?