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Old 07-03-2020, 07:15 PM   #1
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Sensors on Holding tank

2012 Sunseeker 2250S Class C. The holding tank constantly reads full. I am trying to understand the wiring, because I doubt it is the sensor in the tank. Black and white in(presumably positive and ground) and fours sensors with the white (assume ground) to one, and then they split to red, green and pink) but no return. The in tank sensors do not look like any I have seen, so I am wondering if anyone knows the manufacturer.
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Old 07-04-2020, 06:00 PM   #2
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As you probably know, the sensors on all the tanks are finicky and prone to giving false readings because "stuff" gets hung up on them. If you use a wand or your rig has a built in spray cleaner for the tank does it ever give you something less than full?

Also, on our TT I found that the wiring on the grey tank was done incorrectly and it would go from 1/3 full to full. I checked the color & sequence of the wires on the black tank (which worked correctly) and matched the sequence of the grey tank wires to the black - problem solved for our grey tank.
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Old 07-04-2020, 06:43 PM   #3
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Get rid of the old "sensors"( actually just machine screws with exposed heads inside the tank and fastened to wires to the monitor)

And replace them with these:

https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1

I believe I red a post by bclemens that the Dynamax line now uses, will use, or they're considering using, these as OE.

Here's a video explaining the "Why the problem" and the "How they work".

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