2003-2005 Suzuki LT-A500F Service Manual, Page 324Get this manual
ELECTRICAL SYSTEM
First check the insulation between and and between and terminals with the testerApply 12 to the terminals as shown in Fig-1, and check the continuity between and Apply 12 to the terminals as shown in Fig-2, and check the continuity between and If there is no continuity, replace the 2WD4WD selecting relay with new one