2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 357Get this manual
IGNITION SYSTEM
8.Main switch
C0NTINUITY INCORRECT
Refer to "CHECKING THE SWITCH"CORRECT Replace the main switch
9.Pickup coil resistance
Disconnect the AC magneto coupler from the wire harnessConnect the pocket tester100) to the pickup coil terminalTester (+) lead WhiteRed terminal Tester () lead WhiteGreen terminal 2
Check the pickup coil for the specified resistancePickup coil resistance: 459561 at 20 (68 F) (WhiteRed WhiteGreen) MEETS SPECIFICATION