To check health testing you go to http://www.offa.org and type in the name of the dog you want to find. Be very careful to get spelling correct or it won't come up. If nothing comes up and your spelling is correct then the dog was not health tested.
The further back in the pedigree the less likely they are to have been Fanconi tested but breeders who have been in the breed a long time may have known the owner or breeder of the dogs and know if they were Affected.
Here is the OFA listing of Bojak's Undercover Kojak, http://www.offa.org/display.html?appnum=509719#animal
I found it by typing in Bojak into the search box on the OFA site.