2006 Honda TRX680 Rincon Factory Service Manual, Page 98Get this manual
MAINTENANCE
BRAKE LIGHT SWITCH
NOTE The front brake light switch cannot be adjustedIf the front brake light switch actuation and brake engagement are off, either replace the switch unit or the malfunctioning parts of the systemCheck that the brake light comes on just prior to the brake actually being engagedIf the light fails to come on, adjust the switch so that the light come on at the proper timeHold the switch body and turn the adjusting nutDo not turn the switch bodyBRAKE LIGHT SWITCH
ADJUSTING NUT