Question about 2000 Harley Davidson XL 1200 S Sportster Sport

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Need diagram to diag not charging. thanks - 2000 Harley Davidson XL 1200 S Sportster Sport

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To check your charging system, you'll need a DVOM (digital volt ohm meter). The first thing to do it to take your battery out of the bike and take it to an automotive parts house. Ask them to load test the battery for you. This will ensure that the problem is not the battery.

Now, put the fully charged battery back into the bike. Connect the red meter lead to the positive post and the black meter lead to the negative post of the battery. Put the meter's function switch in "DC VOLTS, 20 VOLT range. Start the bike and bring the engine to a high idle. The meter should read between 14.5 and 15.0 volts.

If it doesn't read this voltage, find the wires coming from the alternator on the lower left front of the engine. Follow the wires back to the round plug and unplug it. Look into the engine side of the plug and you'll see two metal contacts. Make sure these are clean. Put your meter function switch in AC VOLTS, 50 Volt range and start the bike. Bring the engine to a high idle. Put either of the meter probes on one metal contact and the other probe on the other contact. The meter should read 25 volts or higher.

If the battery test reads low but the alternator test reads correct, the regulator is probably defective. If the alternator reads zero voltage or low, the alternator stator is bad.

Good Luck

Posted on Aug 27, 2010


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