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Testing Electronic Components On Board?

By on April 16, 2008

During my early days in this electronic repairing field, I thought that all electronic components have to be tested off board (out of circuit or at least one pin out from the board). As years gone by and after repaired many electronic boards, i could say that for certain electronic components you can actually tested it on board! If you know how to do it then it will save you countless hours of time.


But before that you need to know the testing result of a good components so that if you check on board of a particular electronic components you will surely know if it good or bad because a bad components may have the result way far off from the good components. Another thing you need to take note when checking electronic components on board is the parallel circuit! Parallel circuit consists of a circuitry that could have many components in it and this may cause the result of testing components on board not accurate. If you have the time, do lots of practice and surely you will notice that certain electronic components can be actually tested on board without removing them from the circuit!



  1. Hussein

    January 21, 2018 at 6:35 am

    Hi,im in south africa and intrested in testing automotive ecus any advise where to start and how if u can assist.thank you

    • Jestine Yong

      January 22, 2018 at 10:09 am

      Hi Hussien,

      Try check out this website link for more info.



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