1998-2004 Honda Foreman 450 factory service manual, Page 407Get this manual
LIGHTSMETERSSWITCHES Loosen the lock nut and remove the accessory socket
INSPECTION
Check for voltage between the Whiteblack and green wire terminal there should be battery voltage with the ignition switch onIf there is no voltagecheck for 'In open circuit or loose connection in the Whiteblack wireIf there is battery voltage the accessory socket internal fuse is blownReplace the accessory socket(page 20-15)NOTE: he accessory socket has an internal fuseIf the internal fuse is blown, replace the accessory socket assembly