no flush on rear toilet

[bobmacalso]

2011 Allegro Bus. 43 QGP.The red no flush light is on telling me the black tank is full. I have dumped the tank and flushed it out to 90 percent. Does anyone know where the sender is and how to get to it. Any help would be appreciated.

[Oldrtrcr]

In the bedroom, on the wall between the bedroom and the bath, down by the floor there is a wooden grille. Remove the grille and locate the yellow wire. Cut the wire. Will fix the problem. Some folks have just let the wire cut and some have installed a switch to turn it on and off as needed.

[bobmacalso]

Thanks for the information. Will try to find.