2005-2011 Honda FourTrax Foreman TRX500 FE/FPE/FM/FPM/TM Service Manual, Page 445Get this manual
LIGHTSMETERSSWITCHES Remove the fuel tank cover (page 3-5)Remove the three bolts, fuel level sensor and O- ri ng from the fuel tank-
With the fuel level sensor float at the top (FULL) position, turn the ignition switch to ON and check the fuel gauge
BonOM (RESERVE)
All segments up to segment "F" should come onTurn the ignition switch to OFF
SEGM ENTF"