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The charging system is not working new battery keeps going dead. How do I troubleshoot to find the real problem?

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First off ,i'm only going to give you a general test to do,this is because you did not give an exact model so i can't give an exact answer.Most lawn tractors have a stator,under the flywheel of the engine and the wireing will come out from under the engine cover.Locate that harness(it should have 2 wires in it,sometimes three)and then follow the wires to a plug.Unplug the wires and with the engine running,set your multi-meter on a/c voltage and with the engine idling you should have over 20 volts of power coming out of the stator,if not,replace the stator.If you have power coming out of the stator the next thing you need to check is the power supply to the regulator,keep following the harness and it will lead you to a square box(the regulator) with no less than three wires in it.One of the wires should have 12v dc at all times,if so replace the regulator,if not repair the wireing.Let me know if this helps,if not please give me a tractor model number and the results of the above tests.

Posted on Sep 09, 2010


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