ok, thank you very much ,not sure i want to tackle this project yet ,lolWhen I redid mine not only was the internal pump shot but the control panel was as well. Replaced with the external macerator arrangement based on what Max366 had done and replaced the control panel with a leftover Carling rocker switch. Not many opportunities to use it but just didn't like having something that didn't work. Access was the hardest part but if you can convince yourself to cut a larger access where the factory hatch is located it gets a lot easier. I can send you what details I have if you're interested in making the change. Only fuse I'm aware of is in the 12 circuit block in the head.
seems like a pain in the ass , not sure if i will now eitherI will probably never fix mine. We rarely use the toilet and there are pumpout stations at every fuel dock.