Purkeys has produced a short video (above) to help teach heavy-duty vehicle technicians how to properly use an ohmmeter.
Purkeys says an ohmmeter is one of the many functions of a multimeter, and is used to measure resistance in Ohms (Ω). Multimeters combine 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, capacity checks, etc.
In the video, Purkeys National Truck & Fleet Representative Larry Rambeaux demonstrates how to properly use an ohmmeter.
Knowing how to correctly use an ohmmeter is important because service manuals are written with the presumption that people know how to use and understand its readings properly, Purkeys says. If technicians don’t understand what a manual or an ohmmeter is telling them, they can misdiagnose important issues and waste time working on the wrong issue, the company says.
