2005-2011 Honda FourTrax Foreman TRX500 FE/FPE/FM/FPM/TM Service Manual, Page 437Get this manual
LIGHTSMETERSSWITCHES
ACCESSORY SOCKET
INSPECTION
Remove the accessory socket 2P black connector from the frame and disconnect it Measure the voltage between the Whiteblack (+) and Green (-) wire terminals of the wire harness
ACCESSORY SOCKET 2PBLACKCONNIEC1DR
side connectorThere should be battery voltage with the ignition
switch turned to ONIf there is no voltage, check for brown ACe fuse (10 A) and an open circuit in the wire harness