Macerator?

[JHC]

I was looking to see if I could id the circuit for the ground effect lights (see my post on LED lights) and came across a couple of hummus. From the pic, you can see I have a circuit labeled Macerator (#15). I was not aware I have a macerator in my 310RL. Is it associated with the black tank? There is a fuse in slot 15. Also, from the cover, it shows nothing in #18 but I do have a fuse in it. What could it be? Both 13 and 14 are blank and no fuses.
Thoughts?

 

[BryanValRox]

I was looking to see if I could id the circuit for the ground effect lights (see my post on LED lights) and came across a couple of hummus. From the pic, you can see I have a circuit labeled Macerator (#15). I was not aware I have a macerator in my 310RL. Is it associated with the black tank? There is a fuse in slot 15. Also, from the cover, it shows nothing in #18 but I do have a fuse in it. What could it be? Both 13 and 14 are blank and no fuses.
Thoughts?

JHC. there isn’t a Macerator on the 310 RL. Appears your label is wrong.

 

[JHC]

I didn't think there was one. Now to figure out what it is. thanks.