1997 Yamaha YFM600FWAK ATV Service Manual, Page 294Get this manual
LIGHTING SYSTEM EB805020
LIGHTING SYSTEM CHECK 1.lf the headlight fail to come on: 1.Bulb and bulb socket Check the bulb and bulb socket for continuityCONTINUITY 2.Voltage Connect the pocket tester (DC 20 V) to the headlight couplersNO CONTINUITY
Replace the bulb andor bulb socket
Tester (+) lead Green terminal CD or Yellow terminal Tester (-) lead Black terminal
the lights switch is on "LO"ImWhen the lights switch is on "HI"