Digital Multimeters – With the introduction of oxygen sensors into the fuel control system of vehicles in the early 1980’s, we were also introduced to the use of digital multimeters. These early meters were bulky and relatively expensive, when compared to analog meters. Digital multimeters are now fairly commonplace. With digital multimeters available at about the same price as analog meters, the DMM is definitly the best measurement tool for general electrical diagnosis. The advantage to using a DMM over an analog meter are: *Easier to use *Auto-ranging* meters self-adjust to the range needed for a specific measurement. This is particularly helpful when measuring resistance value…

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