The Handy Clip-On Ammeter

Purkeys Electrical Tool Kit comes with a variety of useful tools to help technicians test and diagnose heavy-duty vehicle electrical systems. One of the tools in the kit is the inductive, clip-on ammeter. Unlike a standard multimeter, the clip-on ammeter measures current through the magnetic field, generated by the current flowing through the conductor. By…

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Testing Resistance on 5-Pin Relays

The multimeter combines multiple electrical diagnosis functions into one portable unit. One of the more frequently used functions of the multimeter is the ohmmeter. The ohmmeter measures resistance in Ohms (Ω). In the above video, Purkeys National Truck & Fleet Representative, Larry Rambeaux, demonstrates how to test resistance on a 5-pin relay using an ohmmeter.…

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How to Read an Ohmmeter

The multimeter combines multiple electrical diagnosis functions into one portable unit. Technicians use this tool to test a wide range of situations, including voltage drop, continuity checks, diode checks, and capacity checks. In the video above, Purkeys National Truck & Fleet Representative, Larry Rambeaux, shows how to properly use an ohmmeter. The ohmmeter is a…

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Dual Shield Provides Double the Protection

Heavy-duty vehicles are used by a variety of companies and organizations for a wide range of jobs. Sometimes they need additional electronic devices in order to properly perform their required tasks. That is why Purkeys has developed the Dual Shield Low Voltage Disconnect. Although accessory devices are important, they create a parasitic draw on the…

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Testing the Circuit with a Voltmeter

Multimeters combine multiple electrical measurement functions into one portable unit. These instruments measure voltage, current, and resistance to detect or diagnose a host of electrical issues. To get the most from a multimeter, technicians have to understand what is being measured and what the measurement should be. One of the most commonly used functions of…

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