Battery Cable Alternator Test

So when you test an alternator by pulling battery cable you increase the probability of killing that regulator.

Battery cable alternator test.

Dear tom and ray. The second you disconnect the battery the voltage regulator pegs the alternator to put out maximum power. Start vehicle and voltage on voltmeter should increase to around 13 volts and stabilize there. Doing this would allow you to check whether the alternator is putting out enough current to run the vehicle.

But it s also possible that the alternator is actually in a bad shape but is producing enough to run the. Test alternator by connecting voltmeter on dc 20 red on positive battery terminal and black on negative battery terminal. Again you should see a reading of 0 3 volts or less to be. Technically yes but that test can also wind up destroying all the electronics in your car.

With no battery in the circuit to act as a buffer the alternator can put out up to 150 volts depending on engine rpm. Now about the ineffectiveness of it the vehicle will run if the alternator is producing enough juice. Pcm tcm electronic power steering radio etc. To do a quick check on an alternator i was told that you could start the car and then remove the negative battery cable.

Testing alternator by removing battery cable can you test an alternator by removing battery cable. When the smoke clears that simple test could end up costing you several thousand dollars for new electronics.