where I may find ward membership list of names for the Salt Lake City 17th Ward in the year 1886?
I would try the church history library. Open the link. Scroll to the bottom of the page. And click on contact us.
Fill out the information, along with your question. I have found some amazing information from here.
Happy Hunting :)
If you come to Salt Lake City, you can find this at the Family History Library. Records up to 1941 are on film at the Library. 17th Ward would be the area that is currently north of South Temple and west of Main Street, of Salt Lake City.