Bench Test Alternator

Bench testing an alternator on a test stand should verify whether or not its output is within specifications. Part 1 testing the alternator voltage output with the multimeter in volts dc mode. Here s a video on how to properly and safely test your alternator.

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With no battery in the circuit to act as a buffer the alternator can put out up to 150 volts depending on engine rpm.

Bench test alternator. The titane is a high end tester that perfectly replaces the old alternator test benches at our clients rebuilding and auto electric workshops. Check the reading on the voltmeter again. Otherwise have a helper start your car and rev the engine to 1500 rpm.

And whether you re driving a ford a chrysler or a dodge or a plymouth a nissan a mitsubishi a volkswagen or whatever this test will work. If it s less than 12 2 you ll need to charge your battery before you can test the alternator. The onyx test bench interests our clients because of its developed database and its capacity to perform complete tests on all the alternators in the market with a shocking simplicity.

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 it. Ok the test is divided into three parts. When the smoke clears that simple test could end up costing you several thousand dollars for new electronics.

Please watch the following video below to watch the test being performed by one of our mechanics. If the unit tests bad your customer needs a replacement alternator. Part 3 verifying that the alternator fuse in the fuse box is not blown if equipped.

This on car test doesn t require any tools such as a multimeter or anything else. But if the unit tests good the problem is something else such as a bad voltage regulator pcm or wiring harness. To test for this condition switch the voltmeter to ac voltage with the engine at about 1200 rpm the meter should read 0 volts.

It s a fast test and more importantly an effective test to find out if the alternator is in fact bad. Part 2 testing the continuity of the alternator s output wire to the battery with the multimeter in ohms mode. The voltage should increase by between 0 5 and 2 volts to around 13 6 to 15 8.

If voltage is present one or more diodes has failed and the alternator should be replaced.

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