Question about 2001 Harley Davidson XL Sportster 883 Hugger
To test the charging system, first you need a fully charged battery in the bike. With a fully charged battery, start the bike. Using a DVOM (digital volt ohm meter) put the red lead of the meter to the positive battery post and the black lead to the negative post. Put the meter in DC volts, 50 volt range. Bring the engine to a high idle and you should read between 14.5 and 15.0 volts at the battery. If you read this much, your charging system is operating as it should. If not, procede to check your alternator output.
If not, look for the connector that connects the alternator to the voltage regulator. Disconnect the connector. Now, going into the connector on the alternator side (the wire that comes from the left side engine case) test the output of the alternator. Put your meter in AC volts, 50 volt range. Notice we're measuring AC voltage now. Put one lead of the meter to each of the pins in the plug. Since it's AC voltage, it make no difference which lead goes where. Now start the engine and bring it to a high idle. You should read somewhere around 25 volts or higher. If you read this much voltage, your stator is good and your regulator may be bad. If not, your rotor is most likely bad.
One reason for a regulator not working correctly is lose of a good ground. Take the regulator off the frame and put a "star washer" (serated lock washer) between the regulator and the frame and tighten the mounting bolts. This will restore the ground on the regulator. If this doesn't help, the regulator is probably bad.
Posted on May 31, 2010
Stator. had same problem
Posted on Oct 30, 2012
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Posted on Jan 02, 2017
Tips for a great answer:
I just have same problem signals and brake light dont work when engine running but do when engine not running. Bike is in shop now but I think it might have something to do with a bad battery because I had to charge it just to get signals to work when engine not running
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