How to locate an open circuit in a wiring harness

14 Aug 2017 50:26 286
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This is a 97 Ford Crown Victoria with a 4.6L engine, that does not start. There is no 5 volt reference and no check engine light. Following the EEC Power relay revealed a missing power feed. Follow me as I find the open in this harness using a new tool.

Tools used
- ECT3000 Circuit Tracer (I used the ECT2000 in this video, maybe the 3000 series will have a more powerful open circuit signal?)
- Phil's Electrical Piercing Probe
- OTC 3633 Mini Circuit Tester
- Deluxe DMM w/Amp Shutters (alternate for the Vantage I used)
- Bayco NSR-2168B LED Rechargeable Work Light - 600 Lumens w/3 Magnets Lithium-ion Battery
- Xscorpion HSBCR Heat Shrink Butt Connectors 18/22Ga;50/Bag;Red
- Xscorpion HSBCB Heat Shrink Butt Connectors 14/16Ga;50/Bag;Blue
- Irwin 2078300 8" Self-Adjusted Wire Stripper
- Permatex 85120 Liquid Electrical Tape 4Oz - Each

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at 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!

Due to factors beyond the control of ScannerDanner LLC, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. ScannerDanner LLC assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. ScannerDanner LLC recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of ScannerDanner LLC, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not ScannerDanner LLC.

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