I teach this to my students all the time on where to start looking for a short to ground in a wiring harness. "Look for Points of contact" and "DO NOT start wiggling and pulling on the harness without doing this simple visual inspection first!". It is the difference between accidentally and temporarily fixing your problem and not knowing exactly where it is, and pinpointing the area of the fault right away.
Below is the original video this little clip was pulled from
2006 Cadillac DTS Shorted 5v Reference Circuit
[ Ссылка ]
Typically a vehicle will not run with a shorted 5v reference circuit but in the case of this Cadillac, it has 2 separate 5v regulators, so it can still run with one of them shorted.
For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com 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!
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