How to locate an open circuit in a wiring harness

14 Aug 2017 50:26 223
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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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