VIDEOHow to Test Alternator in Your Car
Apr 04, · Test The Alternator. Before you do anything else, make sure your engine is running so that the alternator can start working. The next step is to attach the multimeter .
How to Test an Alternator (fast and simple)
How do we test for a failed diode? Get your volt meter again. Connect your volt meter to your alternator. Just like before. Set your meter to read 10 volts AC.
If the voltage builds up then you should turn on the lights and A/C-heater fan on high. These are a couple of the biggest electrical loads on a vehicle. Now again raise the engine speed to a .