Hi Gerry, Finding an obituary in San Diego Co. is difficult. The California Death Index lists San Diego but that means County and not necessarily the City.
There is a volunteer who will look them up in the San Diego Untion. Go to freepages.genealogy.rootsweb.ancestry.com/~obitl/ and scroll down to San Diego Co.
If he doesn't find it, you can contact the San Diego County Library, sdcl.org . Place your cursor on Community Services Click on Libraries Click on AskaLibrarians on right-hand side of page.
They did tell me that they are thinly staffed.
Another option is to contact the San Diego Genealogical Society, casdgs.org/cpage.php?pt=28 .
You might have to request a copy of her death cert to find out where she died but even then, it might state San Diego Co. There is also the possibility that one wasn't published. Sorry to be all gloom and doom but that's what it takes in Southern Calif. Successful Searching!