In this video I am going to show you how to bypass a magnetic type crank sensor (VRS) and force an ignition coil to fire. On some systems, the coil will not fire due to design differences but you can still look for other responses. This is a great direction based test and will help you determine very quickly whether or not you have an input or output problem within the ignition system.

Engine Performance Diagnostics chapter 21 pages 16-19

test shown enh 50

  • pick-up coil and crank sensor bypass test using a test light

Tools used

  • incandescent test light

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(Chapter 21) Ignition inputs, cam and crank

Related videos:

GM Bypass Ignition System Operation:


How to test a Ford crank sensor (Ford 2 0L Case Study):


No Start, No Spark, No Injector Pulse (faulty crank sensor):


Ford Cam Sensor Synchronizer Test:


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For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!