Troubleshooting alternators
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| − | The function of an alternator is to keep | + | The function of an alternator is to keep the battery(s) in your vehicle charged. In order to troubleshoot the functionality of the alternator you will need some basic electrical tools. A good digital Volt/OHM meter is the bare minimum. When the vehicle is running with a fully charged battery you should read between 13.6 and 14.2 volts at the battery. This is the basic test to see if an alternator is working at all. Before performing the above test make sure the alternator drive belt is tight. If the voltage is within spec the next this to test is to see how much current it is capable of delivering. Most alternators will have the rated current capacity stamped on the case somewhere. |
To test current you will need a high power amp meter capable of 100 amps dc. Most home mechanics will not have this in their tool box. You will need to either take it to a shop that can test it on the car, or pull it and take it to one of the auto parts stores that has a machine to test it. | To test current you will need a high power amp meter capable of 100 amps dc. Most home mechanics will not have this in their tool box. You will need to either take it to a shop that can test it on the car, or pull it and take it to one of the auto parts stores that has a machine to test it. | ||
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