Richpin demonstrates how to test an alternator with a standard multimeter. First make sure that the vehicle's battery is fully charged. Take the negative lead of the multimeter and put it on the negative post of the battery. Place the positive lead of the meter on the positive lead of the battery. Set the meter to DC voltage using the 20 scale and read the display to ensure the battery is fully charged. Next start up the vehicle and see what the alternator is producing. The display should now read one volt over the initial reading. If the reading remains the same, then the alternator is not producing any electricity. Now, turn on the lights and heater blower to see, if the alternator is weak. Let the car run for a while and if the display holds its reading, then the alternator is working fine.
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2 Comments
Thankyou for providing testing instruction for checking alternator.
First of all is she going to use a meter on an alternator you got to set it to direct current because if it's getting 13 volts ac it does the battery
no good cuz your battery runs on DC and not a c alternators make alternating current and that means your voltage rectifier is bad.
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