1987 Honda Fourtrax TRX 250X Service Manual, Page 222Get this manual
ELECTRICAL SYSTEM
HANDLEBAR SWITCHES
The handlebar cluster switches Uights, engine stop, dimmer) must be replaced as an assemblyDisconnect the 4P couplerPerform continuity test for the components of the handlebar cluster switches
(3) ENG INE
The switch is normal jf continuity between the circuits marked "00"LIGHTING SWITCH