Topic: SeeLevel II Tank Monitor Short 2020 U24MB (Read 1621 times) previous topic - next topic

The SeeLevel II Tank Monitor in our 2020 Unity MB is showing "Sht" meaning something is shorted to ground. It's also missing just one letter to express my reaction    I've tried disconnecting the wires from each tank sensor in turn with no change. I also disconnected the blue wire from the panel--no change. I ordered a new panel (on advice from Garnet Instruments) and installed it and got the same reading. Anyone have experience figuring out where the short is located? Also, although it seems irrelevant, this happened right after I had the pump for my four-point leveling system replaced at EQ Systems. I would welcome any suggestions.

That is exactly what I though when I read that error code, at least the designers had a sense of humor

Looking at the wiring diagram all the signal wires are bussed together "somewhere" so that error could be any one of the sensors.  We had an issue with the EQ system (installed at EQ) but ours threw a check engine code due to a slightly pinched vacuum line.  Found it by looking at each area the  system was installed, its just very congested in some areas.

Are there tanks (fresh/grey/black) anywhere close to where the pump repacement occurred?  The sensors themselves are pretty obvious (even through the spray coating on the tanks) so I'd suggest finding them and follow the cable to see if it routes anywhere by the pump / area things were worked on.  The error means the sensor cable has been pinched to ground.

Thanks very much. I do plan to follow all the wires from the sensors. The tanks are not near the pump but a hose was also replaced so I have a call in to EQ to find out the routing of that hose. Also called LTV to find out where all the wires come together. To get underneath with more room I'm thinking about buying jack stands. Anyone have recommendations about which ones to buy and where? Is a 6-ton pair sufficient? Where should they be placed to hold up the rear of the coach?

Quick update: instead of jack stands, I bought a knock off of the Magic Creeper to get underneath with more clearance than my wheeled creeper allowed. In the end it turned out the problem was a blown 10 amp fuse on the line from the water pump to the tank monitor. It should have shown Opn rather than Sht but I guess it confused the circuit board. Another reminder to check the easy stuff first. Problem solved. BTW Garnet Instruments and LTV were both extremely helpful throughout this little adventure.