How to test a starting system on a 2000 Jeep Wrangler 4.0 using just a basic test light. In this video I will be showing you how to quickly locate the problem of any no crank problem, on any car.

Topics discussed


  • engine does not crank<\li>
  • headlights remain bright<\li>

fix 50

  • replace faulty starter motor

test shown

  • how to determine battery state of charge without a voltmeter
  • discuss what variables you need to consider when using the headlights as a guide during cranking
  • how to test a starter motor using a test light
  • how to test the starter ground on the block
  • how to determine ignition switch and park/neutral switch operation
  • how to bench test a starter motor

Tools used

  • incandescent test light
  • remote battery jump starter
  • pocket screwdriver

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Starting, Charging and Battery system problems

Related videos:

No Crank Troubleshooting (engine does not crank) - Jeep:


Engine does not crank (bad block ground) - Cadillac:


How to test a starter (engine doesn't crank) - GM 3800 engine:


How to troubleshoot a no crank problem (94 Toyota Celica):


Engine does not crank (seized alternator) - Mini Cooper:


How to test a starter motor (no crank from a bad block ground) - Nissan:


How to troubleshoot a starting system (bad ignition switch) - Dodge Neon:


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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!