Will records, 1862-1921, have been copied by FamilySearch.org and they are available online at their website.  Each ledger contains an index by last name that is about 48 pages long.  When you find your ancestor’s will, it will show a page number within the ledger.  This number refers to the pages following the index which have large numbers in the upper corner.  When you enter a go to page number, you must allow for the index pages.  After a few attempts to get to the correct page, you will see the pattern.  Follow this web path:

www.FamilySearch.org

Scroll down to United States

Scroll to Illinois Probate Records 1819-1970 (click on Browse Images)

Select DeKalb

Scroll to bottom of list and select the year of death for your ancestor

Locate the name in the index

Search for the correct page.