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Old 07-10-2018, 06:02 PM   #1
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Water tank sensor wiring

When I push the "press to test" buttons to check the water tank levels, (Fresh, Black, Gray) all indicate "E", even when they are full.


I crawled under the camper and found the sensor wires broken at the studs protruding from the tanks.

However I could not locate any broken or cut wires on the trailer harness side????

Does anyone have a schematic or photos of how these sensors are wired?

Thank you in advance!

Shawn
Attached Images
File Type: jpg Broken Sensor wires at studs .jpg (77.1 KB, 3 views)
File Type: jpg Broken Sensor wires 1.jpg (72.5 KB, 7 views)
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Old 07-10-2018, 06:39 PM   #2
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Google rv tank sensors. There is a lot of info. There should be wires of the same gauge running along the underside of the camper that would attach to those sensors. Wonder why the PO cut them off.
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Old 07-11-2018, 08:03 AM   #3
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One ground wire to all, one sensor wire to each sensor. Before you cut the sensor wire make sure what sensor wire lights what light to insure you have enough wire by touching it to the ground wire. Don't expect miracles they are notoriously inaccurate. I believe the colors are somewhat standard as to their purpose. If you really what accuracy SeeLevel gauges can't be beat and the sensor boards stick right to the outside of the tanks.
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Old 07-12-2018, 08:48 PM   #4
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Hi Shawn,

Is your camper is a 2004 model? If so you have the KIB tank monitor system.

Down at the tank, the 3 terminals in your pics should look like this. There is a red resistor pack that makes the whole thing work right.

This is off my 2004 T310SR


A close up of the resistor pack


This is what you are missing
https://www.amazon.com/KIB-K101-Repl...+resistor+pack

That red wire that is skinned and no terminal on it in the Amazon pic is the wire that goes up through the floor and connects to the tank panel with the water heater and water pump switch in it. Depending when your 2004 was made (what month/year) it has a 2 switch KIB tank panel on the earlier ones or a 3 switch KIB tank panel on the later ones.

Sunline ran that red wire up through the floor in a plastic sleeve pipe chase. Look around under the camper for a white plastic sleeve filled with black silicone caulking up the wires in the end of the sleeve. It should be where the other 2 tanks have their wire going up into the camper. Hopefully there is a dangling wire there that you just need to hook back up when you get your new resistor pack.

The yellow leed is the bottom most terminal, the green the center and the orange the top.

The prior owner may have ran over a lot of brush or tall weeds and the wires got caught up and yanked off.

Hope this helps

John

PS Are all your tanks missing wires, even the fresh tank? They all use the same resistor pack just the red wire hooks to a certain pin on the tank panel. If you are missing "all" 3 tanks we can help you sort out which is which once you find that pipe chase.
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Old 07-13-2018, 04:56 AM   #5
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John,

THANK YOU!!!!

The missing wiring makes sense after reading your post.

I am missing all 3, not sure how or why that happend. I suppose running the trailer over brush could have ripped the wiring off. Or a previous owner had sensor issues and removed the resistor packs.

Thank you again John for your knowledge and assistance!!!!

Shawn
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Old 07-14-2018, 05:37 PM   #6
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All of them gone... Ouch.

There is also a white wire on each tank that goes to a probe by itself and then to the camper frame ground. That wire seems to show up in your pic and since you have none working, thought I would mention that.

Thanks for the thanks. We are always glad to help

John
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