Thursday, 4 September 2014

How to check alternator voltage with a meter

Quick and easy way to see if you vehicles alternator is working as it should. Christophe Chery If you only get 14. It is important to check your car alternator regularly because it will allow you to know if your alternator is charging the battery properly.


It will give you an advanced notice, and reduce the chances of being stranded on the side of the road . Bad battery or bad alternator , how to tell the difference (brief version) - Auto Information Series - Duration: 8:42.

After watching this video, you will be able to safety test alternator voltage output.

Multimeters are also known as VOMs (Volt-Ohm- Meters ) or DMMs (Digital Multimeters).

Locate your alternator and check to be sure the alternator belt isn't loose. How to load test an alternator. Step 4: There are two ways to test the voltage coming from the . You can find one at any auto parts store for less than $20. A multimeter measures voltage as well as other electrical properties such as . With the engine off, battery voltage should be between 12. Then start the engine and check for increased voltage readings as shown above.


It can also cause other electrical components such as the radio and gauges to act strangely. If voltage is present one or more diodes has failed and the alternator should be replaced . Hi, battery voltage check before starting car was 12. Electrical connectors and wire . This video states in the title . Your Moss tech, Hans, is back once again to talk about how to test your Alternator . You will learn how to check for correct voltage at the alternator and dia. Simple way to test your alternator. Gather your materials - You will first need the following: Rubber hose (Approximately three feet), Safety glasses, Voltage meter or digital multimeter , Wheel Chocks.


Warning: When working under the hood with the engine running you want to always exercise caution around . PART 1- Testing the alternator voltage output with the multimeter in VOLTS DC mode. PART 3- Verifying that the alternator fuse in the fuse-box is not blown . Place the positive lead of the meter on the positive lead of the battery. Set the meter to DC voltage using the 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.


Figure – Checking ripple voltage. A good alternator should measure less than .

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