2008 Yamaha Rhino YXR70FX Factory Service Manual, Page 459Get this manual
LIGHTING SYSTEM EBS01070
CHECKING THE LIGHTING SYSTEM 1The headlights fail to come on1Headlight bulb and socket Check the headlight bulb and socket for continuityRefer to "CHECKING THE BULBS AND BULB SOCKETS" Are the headlight bulb and socket OK? YES NO Replace the headlight bulb, socket or both
2Headlight relay Remove the headlight relay Connect the pocket tester1) and battery (12 V) to the headlight relay as shown high beam low beam