In this episode of The Trainer, master diagnostician and Motor Age Technical Editor, Brandon Steckler discusses how to determine the functionality of a component via current flow. Utilizing a multi-trace lab scope and current probe Brandon captures aspects of circuit operation in both a functional A/C compressor clutch circuit as well as a faulted one. It all begins with studying the wiring diagram for the vehicle in question and building a game plan before approaching the vehicle. Executing the game plan at the vehicle yields answers to the questions.

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