Alternator Component Testing

[josephmartin]

Thank you for this great explanation video on alternator component testing. I was impressed by the magnetising of the armature with a power supply. Excellent video👍

[CarbonGlassMan]

This video is a great help. Thank you for making it. I will not pay $250 for an alternator for a 2005 Colorado with 263k miles on it unless I have to. My alternator stopped charging so with this video I was able to check for continuity in the field coil (good), the 3 phases of the stator (good) and the diodes (good). I noticed one of the diodes came loose from the rectifier. I soldered that back together and replaced the voltage regulator. That did not fix the problem.

The slip ring was very deeply grooved and one of the brushes was very short. The slip ring connection to the field coil on my alternator was covered in a thick epoxy so I was not able to test those connections until I had chiseled the epoxy off the connection, so I may have broken a connection when chipping the epoxy off, but one of the slip rings did not have continuity, so I am hoping that the problem was with a connection to the slip ring. Luckily the rebuild kit I paid $47 for included bearings, a voltage regulator and a new slip ring. I hope tomorrow when I replace the bearings and the slip ring that my alternator will start working again.

[martineza]

Great video, with how expensive these alternators are today it's good to know how to test individual components and save money on repairs.

[MasoudMehdirad]

Perfect and straight forward. Thank you. Well done.

[pragasamsupiahs]

Very clear and concise explanation on the workings of an alternator. Thanks for the video sir.

[shamolshahran]

Been searching for a good video on this topic. And in My opinion this is one of the best on you tube. Thanks you very much.
Subscribed.

[fransmosia]

Thank you sir this is a very good video, you made me understand the fundamental operation of an alternator in 14 minutes.

[JerichoRally]

Phenomenal demonstration! Thank you very much!

[mouldyboats]

Reversing polarity during Diode test IS part of a diode test that should be done.
After all it tests the primary function of the diode (rectification)

[uoemqng]

I really like your video sir
Its is really informing
Thank you
Keep going

[billionkitchensbillionkitc]

Thanks for the first time to see rotor test

[busterscruggs]

awesome video, as a student I really appreciate the knowledge. thanks

[samsonhetz]

Thanks 👍👍 this is very clear and easy to understand.

[yuusuffaandhe]

Yes i need lots of differetial works of an alternator

[vivekindia]

Fantastic and good explanation
Thank you

[radishpea]

Great video. The measurements/readings you got for the various components, how well can we use them for our own alternators? Do the measurements differ much if at all between smart and dumb (always charging) alternators?

[hdoptbu]

Hi there, can anyone tell me, I did this test and found the voltage regulator testing faulty, would this be the reason when I connect the battery to the cable that connects to the alternator this cable becomes very hot at the alternator end,

[qjrvmob]

The direction of the current alternates because the connection of the router leads with stator leads alternates after each 180 turn of the router through the two slip rings?

[kaapuutt]

Excellent man u should be a professor, even the dumbest person can understand 👍👍👍

[TheDowden]

Thanks for the video. What happens if the overall diode test results in a measurement above 800 mv? My Hitachi 110 amp alternator is having charging issues and the diode test is measuring around 827. Thanks.