2002-2006 Yamaha SX Viper 700 Series Snowmobile Service Manual, Page 237Get this manual

2002-2006 Yamaha SX Viper 700 Series Snowmobile Service Manual, Page 237

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GRIP WARMER SYSTEM SCH8680
If load control relay does not have continuity

SCH8690

between the bluered and orangeblack terminals, replace it