How To Test Alternator With Jumper Cables. Start your engine and let it run until reach an idling rpm. Conduct a Voltmeter Test.
Heres how to perform the test. Start your engine and let it run until reach an idling rpm. If its below that charge the battery with a battery charger before you conduct the test again.
If the engine operation stops the alternator is.
Heres how to perform the test. You should have a reading of 135 to 145 volts. There is also a way to check the alternator if not working right. Open the door and leave it open so that the dome light can come on and stay on.
