How does one test FETs using a VOM?
You did not state if the FET is in the circuit or out. And assuming it is a MOSFET, if the FET is out of the circuit, gate to source resistince should be many megohms, both polarities. An N type Mosfet will be several megohms with the ohmmeter positive lead on the drain if gate and source are connected together and to negative lead. Reverse the leads and read a diode drop.