How To Check If Your Alternator Is Charging

If your voltage is still the same theres a problem with the charging system.

How to check if your alternator is charging. Thus the vehicle requires an additional source to charge this battery. With the engine running connect the meter red probe to terminal B on the back of the alternator and the black meter probe to the alternator case ground. The first step in monitoring your alternator to check the levels is to check the alternator gauge itself.

Now take the negative black multimeter probe and touch it to some metal part of your car frame like a bolt head nearby or even the negative terminal on the car battery. This time it should be at least 142 volts if the alternator is healthy and charging the battery. With the engine off battery voltage should be between 125 and 128 volts.

If it is lower than that you may need to replace your alternator. If they dont fade over time your alternator is working fine. Turn off your lights radio air conditioner or.

When you start up your car look at your interior lights. If the charging circuit connections are good continue with the following tests. As soon as the car engine starts it will start working.

Get a cheap voltmeter. Camshaft_farmingmechanicalIn this video I show the basic procedure used to check if an alternatorgenerator is charging a battery demonstrated. If the headlights are dim the alternator is going out.

Dont ground to the alternator itself. However if the alternator isnt working correctly it may send too great of a charge to the battery which is known as overcharging. Does your car not start do you have dim headlights or interior lights do.