2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 385Get this manual
SIGNAL SYSTEM 6.If the reverse indicator light fails to come on: 1.Reverse indicator light LED
Check the LED of the reverse indicator lightRefer to "CHECKING THE LEDs"CONTINUITY
NO CONTINUITY
Replace the meter assemblyNO CONTINUITY
2.Reverse switch Refer to "CHECKING THE SWITCH"CONTINUITY