2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 385Get this manual
LIGHTSMETERSSWITCHES
ASSIST HEADLIGHT (Except ACM type TM model)
BULB REPLACEMENT
Remove the screwRelease the four tabs of the assist headlight upper cover from the slits in the front and lower coversDisconnect the breather joint hose from the upper cover and remove the coverHOSE TABS UPPER COVER
SCREW BULB
Disconnect the assist headlight connectorRemove the retaining ring by turning it counterclockwise and remove the bulb from the headlightInstall new bulb and removed parts in the reverse order of removal