How To Check Alternator By Removing Battery Cable. PCM TCM electronic power steering radio etc. First open the hood and start the car.
A 10 dollar Chinese voltmeter will tell you if your alternator is charging. To do a quick check on an alternator I was told that you could start the car and then remove the negative battery cable. Doing this would allow you to check whether the alternator is putting out enough current to run the vehicle.
Get a cheap voltmeter.
Therere two easy methods to check if the key component is bad and its draining the batteries. If the engine operation stops the alternator is. Testing alternator by removing battery cable was a valid test back in the day before computers. Get a cheap voltmeter.
