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In the material you will see how a popular circuit tester works and why its use can result in damage to various components. Registration for the last training this year can be found at: https://autonomis.pl/sklep/ 00:00 Introduction 00:30 Intro 00:45 Description of how the tester works 02:56 Starting the tester and discussing the functions 04:54 Testing several components 07:32 Why such a test is ineffective 09:42 Checking the circuit on a prototype installation 15:56 What if you make a mistake and cause a short circuit 16:55 Learn about the structure of the system and only then test it 20:49 Load test on a glow plug 21:45 Maximum load of the tester 23:19 PWM signal test 26:14 Summary