KSGN/900 began operation in September 1947, a 1000-watt daytimer licensed to Sanger CA. It changed call letters to KSJV (presumably meaning "San Joaquin Valley") in March 1951. It was purchased the following year by John Poole, who is probably best known for putting
KBIC-TV/22 Los Angeles on the air at the end of 1953, and airing nothing but a test pattern until he sold the station ten years later.
Poole changed the calls to KBIF, and applied to move to 1150 adding nighttime directional service (which was denied). He sold 51% to a pair of local Fresno businessmen in 1957; two years later, one bought the other out.
Both Poole and the remaining local partner sold out in 1961 to Norwood Patterson, who is most famous for putting KICU-TV/43 on the air in December that same year, only to go dark in October 1968 after some questionable bookkeeping left the station insolvent. (His father was Sherwood Patterson, the original licensee of channel 32 in San Francisco ... the article on same at the
UHF History site includes the KICU-TV details.)
It's still on the air, on 900kHz, same calls and daytime facilities, but now also has nighttime service with 500w-DA.
The Wikipedia page on KBIF has a little more information, including temporary ownership in 1950-51 before the sale to Poole was forced by the purchase of KNGS in nearby Hanford. I couldn't find any information on the station's programming prior to Patterson and there's nothing in Wikipedia about that either.