1987-2009 Yamaha ATV YFM350X Warrior Raptor Service Manual, Page 225Get this manual
ELECTRICAL STARTING SYSTEM
3Main switch conduct -Disconnect the main switch coupler (Red, Brown, BlackWhite and Black) from the wireharness-Connect the Pocket Tester (Q l) to the main switch coupler (BlackWhite CD, Black Red and Brown )First Check Tester+) BlackWhite CD Lead Tester (-) Lead Second Check Tester+) Lead Red Lead Tester (-) Lead-r Brown Lead
-Turn the main switch to ON and OFF-Check the main switch for continuitySwitch Position
ON OFF 0: Continuity
Good Condition