The multimeter is an Automotive Shop Equipment Los Angeles used to check almost any circuit on the car, but caution must be used when selecting one for purchase. It should be an automotive meter of high impedance and preferably digital. A high-impedance meter is used to protect electronic circuits during testing. It will have two regular leads: a black and a red. Automotive multimeters have additional leads for temperature, engine speed, and other measurements exclusive to the automobile. The controls on most multimeters include selections for the three basic electrical measurements: voltage, current, and resistance. Some meters require the operator to select the range of measurements. The better and more expensive ones have automatic ranging. Ranging is the scale of measurement. For instance, if voltage is being read, the operator may have to select a 0-20-volt scale or a 20-100-volt scale. Automatic ranging meters do this automatically.
Automotive multimeters have selections for revolutions per minute, temperature, frequency, and others depending on the make and model of the meter. Additional leads are required to make the most of these measurements. There are meters that measure only resistance (ohmmeter), voltage (voltmeter), or current (ampere). Meters of this type are not common in