Bldg 14 is located on the South Service Road(runs along inbound Van Wyck Expwy). It has its own parking lot in the front - visitors may park in there and have to register in the main lobby security reception desk.
Refer to this map for the exact location:
http://www.panynj.gov/air-cargo/jfk-map.html
JFK Airport Guide
Bldg 14 is located on the