Keep in mind that the Airtrain is outside security so time may be an issue depending upon if your flight arrives on time. Take the Airtrain that DOES NOT say Howard Beach or Jamaica. You want the one that just loops around the airport.
Here's a map:
http://www.panynj.gov/airports/pdf/jfk-airtrain-map.pdf
Here's a terminal map too:
http://www.airportterminalmaps.com/J...minal-map.html
Welcome to Flyertalk,
ComputerX.