2005-2009 Honda TRX400EX/TRX400X Service Manual, Page 293Get this manual
BA TTERY CHARGI NG SYSTEM CHARGING VOLTAGE INSPECTION Be sure the battery is in good condit ion before performing this testWarm up the engine to normal operating tempera reConnect the mu ltimeter between the battery posi tive (+l and negative termina ls
To prevent short, make absolutely certain which are the positive and negative terminals or cables Do not disconnect the battery or any cable in the charging system without first switching off the ignition switchFailure to follow th is precaution can damage the tester or electrical componentsConnect the tachomet erWith the headl ight on, measure the vo ltage on th mu ltimete when the engine ru ns at 5,000 rp (mi n' 1)
STANDARDMeasured BVMeasured CV15.5 BVBattery volt age (page 16-6) CVCharging voltage
REGULATORRECTIFIER
WIRE HARNESS INSPECTION
Disconnect the regulatorrect ifier 6P connectorCheck the co nnector or loose contact or corroded ermi nals