Travelin2 wrote:
First, remove the wire from the bottom sensor on the freshwater tank. that is the wire that all the other wires connect to through the water to provide a resistance value for the circuit board. If your board still shows full with that wire removed, then either the board is bad or the wires are connected out of order.
You can check for continuity between that wire (after it's removed) and the frame or any known ground source. If it is a good ground then touch that good ground wire to each of the other wires(they can stay connected) and you should be able to illuminate each of the different levels.
I will have to move my trailer up to a smooth, dry spot, (raining now) and work on this. It gives me a place to start. I guess I can add up the amount in the grey and black gauge to guess on the amount used. Thanks for the comeback. Sounds good.
Mike