2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 556Get this manual
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LIGHTSMETERSSWITCHES
Discon nect he horn switc ire con necto rs,Check th co nti nuit between he co nnecto tarrni-
na!s There should be co nti nui ty wh en he horn SWitch is pushed,