1999-2002 TRX400EX Fourtrax Service Manual, Page 249Get this manual
LIGHTSSWITCHES Pull the taillight bulb out of the socketInstall new bulb and the socket in the reverse order of removal
NEUTRAL INDICATOR
Removethe indicator lens from the bulb socketRemovethe neutral indicator from the front fenderPull the indicator bulb out of the socket, Install new bulb, the lens and socket in the reverse order of removal
IGN ITION SWITCH
INSPECTION
Disconnectthe ignition switch connectorsCheck for continuity between the connector terminals in each switch positionContinuity should exist between the color coded wires as follows: Color Position Blackwhite Green Red Black CONNECTORS