How to Use a Multimeter Specifically Designed for Automobiles?
2 Answers
The method of using an automotive multimeter is as follows: Rotate the selector switch of the automotive multimeter to the DC voltage position. At this point, the multimeter enters the automatic range selection mode, which can automatically choose the optimal measurement range. Alternatively, you can press the range button to switch to manual range selection mode. Insert the lead of the red test probe into the voltage jack on the panel, and the lead of the black test probe into the COM jack on the panel. It is important to ensure that the positive and negative test probes of the multimeter match the positive and negative polarities of the circuit test points when reading the measured DC voltage value. The multimeter is one of the commonly used instruments for detecting electronic circuits, primarily due to its portability, ease of use, and ability to measure multiple parameters effectively.
I've been dealing with car faults for decades, and a multimeter is an essential tool. Using an automotive-specific multimeter is simple: first set the range, such as the DC voltage range to measure battery voltage, select the DC V symbol. Disconnect the negative terminal of the battery to prevent short circuits, insert the red probe into the positive terminal, and connect the black probe to the negative terminal. The ideal reading should be around 12.6V; if it's below 12V, the engine may have difficulty starting, and you should check the alternator or charging system. When measuring resistance, select the resistance range (Ω), disconnect the power supply of the circuit being tested, such as both ends of a bulb socket, and check if it falls within the range specified in the manual. Safety tip: Wear insulated gloves and avoid touching metal parts with both probes simultaneously. I like using it to quickly check if a fuse is blown, saving a lot of trial-and-error time. For daily use, don’t forget to calibrate the meter regularly to maintain accuracy. This method has helped countless car owners save money and hassle, preventing minor issues from turning into major repairs.
