01 black tank wiring
Just happen to be down there replacing the tank adapter and here is what I have.
Seems to be a lt. brown to the upper terminal along with the green,
yellow to the middle, blue to the bottom. A separate white to a 4th indicator on the other side of the 3" drain.
I believe that the lt brown and the white are from the control panel in the galley..could be wrong there. the green, yellow and blue are tied together in some sort of orange sealed thingy which might be some sort of resistor or may just be used to keep the connections water tight.
hope that helps.
"If you come to a fork in the road, take it."