I just bought my 2018. This RV was barely used. I think it sat a lot. The macerator hose was all cracked. When I went to replace it. I found the wires to the Macerator were corroded. Only one wire was connected. The manual doesn’t show anything on the wiring. The wires are right under the pump. Would you be able to get a picture of it? There is 3 wires from the RV (black, white & grey) and 4 wires from the pump (black, white, and 2 purple. The black is labeled +, the white goes directly to ground. If I can get mine fixed, I might be able to help you. You can text me directly (727)267-4069.