Originally Posted by Adony
Just installed Horst sensors in my black tank..empty tank reads fine BUT when the tank gets 1/3 full, indicator reads 2/3 as it did with old sensors..color coding on wires to sensors is correct..white/ground...yellow 1/3 sensor, and green for 2/3 sensor.....Am on a trip and seeking ideas or solutions..
Ted, I would pull the yellow wire from the 1/3 sensor and touch it to your ground lead and see if it lights the 1/3 indicator, I am betting it lights your 2/3 indicator.
I had a similar problem on our last camper when it was brand new, When I got it home I filled all the tanks to full to make sure no leaks occurred and while I was walking out the door I just happened to push the gray tank level indicator and it said it was full, which was impossible since the water had only been on for 3-4 minutes!
I got underneath and checked the wiring and per the info found on the forums the colors were correctly installed at the right positions so I jumped each wire to ground and sure enough the lowest sensor lead made the full indicator light up. So, knowing it was miss wired somewhere between tank and indicator panel I pulled the panel and it was a spaghetti factory behind there and I did not want to break into the hardwired bundles so I just swapped wire positions on sensors, filled the tank while watching the indicator and it worked as designed, never had another problem with it.