Tank Monitor Problem

[Stanley]

Got cruiser 5th wheel 2014
Fresh water tank shows full all the time even when empty
Checked ohms reading between sensor wiring and ground. approximately 600K
Done same with grey water sensors, same ohm reading but monitor reads empty. Thinking problem in circuit board. Is there a circuit board available for this trailer

[Wingerdinger]

The tank sensors are notorious for not reading correctly, most of the time because they are dirty. Fresh water tank sensors are generally more reliable because the tank is clean.
You cannot read the resistance of a sensor to ground, it is in relation to another sensor, usually the lowest one.
Here is a link to a forum discussing it, and a sensor upgrade.
I would doubt it's a board issue.
https://www.forestriverforums.com/fo...ors-76463.html