2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 427Get this manual
SELECTABLE 4WD SYSTEM (FMFE models)
SERVICE INFORMATION
GENERAL
The drive mode (2WD or 4WD) can be changed electrically by operating the front final clutch with the 2WD4WD select switch When checking the selectable 4WD system, always follow the steps in the troubleshooting (page 23-4) Refer to page 16-3 for front final clutch information faulty selectable 4WD system is often related to poorly connected or corroded connectionsCheck those connections before proceeding Refer to page 16-12 and page 16-32 for vehicle speed sensor removalinstallation