2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 350Get this manual
BA TIERY CHARGING SYSTEM 5Charging Voltage Inspection Measure and record the battery vo ltage using digital multimeter (page 18-7)Start the engineMeasure the charging voltage (page 18-10)Compare the measurements to result of the following calculation STANDARDMeasured Battery VoltageMeasured Charging Voltage15.5 V
Is the charging voltage within the specified range?
NO YESGO TO STEP 6- faulty battery