Question about Harley Davidson XLH Sportster 883 Motorcycles
Ok, you need to charge the battery in your bike to full charge and you'll need a DVOM (digital volt ohm meter). Connect the meter to the battery with the red lead going to the positive post and the black meter lead going to the negative post. Put the meter's function selector switch in "DC VOLTS" 50 volt range. Start the engine and bring it to a high idle. Within a minute or so, the meter should read 14.5 to 15.0 volts. If it does, your charging system is fine. If not, proceed to the alternator test.
Follow the two wires from the voltage regulator on the front of the bike until you find the plug where it plugs into the lead coming from the alternator inside the engine case. Unplug this connection and look into the end coming from the engine. There are two pins inside this plug. This is where you're going to check the voltage output of the alternator. Since this voltage is AC, it makes no difference which meter lead goes into which pin, just don't let them touch each other or the engine case while take the measurement. Put the meter's function switch in the "AC VOLTS" 50 volt range position. Start the engine and bring it to a high idle. Insert the probes from the meter to the pins from the alternator. You should read at least 25 volts.
If you don't get at least 25 volts, the stator in your bike is bad. If you do get the 25 volts but not the 14.5 volts at the battery in the previous test, the regulator could be bad. Make sure that the regulator is grounded to the frame properly. I like to put a "star type" lockwasher between the regulator and the frame on at least one of the mounting bolts to insure a good ground. I hope this helps.
Posted on Apr 11, 2011
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Posted on Jan 02, 2017
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