2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 349Get this manual

2003 Yamaha YFM400FAR Kodiak Factory Service Manual, Page 349

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SIGNAL SYSTEM 5.If the four-wheel drive indicator light fails to come on: 1.Bulb and bulb socket
Connect the pocket tester (DC 20 V) to the bulb socket leadTester (+) lead BrownRed terminal Test