2003 2005 YFM45FAR, YFM450FAR Kodiak OEM Service Manual, Page 15Get this manual
FEATURES
GEN INFO
In addition, the 4WD (Diff-Lock) mode can be engaged only when the ATV is stoppedEven if an attempt is made to select this mode when the ATV is traveling, it will only result in standby condition (i.e when the differential lock select switch and the differential gear are not matched)(1) When the ATV is traveling Even if the 4WD (Diff-Lock) mode is selected, the gear motor will stand by, instead of operatingTherefore, the ATV can be driven in the normal 4WD modeWhen this occurs, the differential gear lock indicator light" in the speedometer unit will flash to alert the driver that the control is on standbyWhen the ATV is stopped, the control transfers to the condition described in (2)DIFFLOCK