Bench Testing Alternator
Get a cheap voltmeter.
Bench testing alternator. If you see higher readings chances are the alternator is good. If it s below that charge the battery with a battery charger before you conduct the test again. 27 jun 2012 1 gordontytler new member.
Bench testing an alternator. One to ground one to terminal of battery and the correct post on the alternator. Howto bench test an alternator.
With the engine off battery voltage should be between 12 5 and 12 8 volts. I have my alternator in a vice and i am ready with my volt meter battery and drill but i am not sure how to wire it up. If the old alternator passes the tests the problem is obviously not the alternator and you ve missed something.
Another approach for reducing comebacks and unnecessary warranty returns is to ask your parts supplier to bench test your customer s old alternator and to bench test the new alternator before you install it. As rr said it s going to need a voltage applied to it s input so it can actually begin it s function. Start date 27 jun 2012.
Joined 26 feb 2012 messages 84. Put the black lead on the battery negative terminal. The fast and easiest way to test an alternator with a drill a socket and multimeter this way by spinning will produce electricity and therefore test for its functionality please like a share.
Then start the engine and check for increased voltage readings. It should hover around 12 volts. Conduct a voltmeter test.