How do you check if a fuse is blown with a multimeter?

To test a car fuse using a multimeter, you need to set it to the Ohms or Continuity setting. This setting allows you to measure the resistance of the fuse, which indicates whether it's blown or not. The Ohms setting is usually represented by the Greek letter omega (Ω) on your multimeter.

Choosing the Correct Setting

When selecting the setting on your multimeter, make sure to choose a range that can handle the expected resistance of the fuse. Most multimeters have an auto-ranging feature, but if yours doesn't, a good starting point is the 200 ohm or 20 ohm range. If you're unsure, it's always better to start with a higher range and adjust as needed.

Here are the steps to follow:

• Turn off the car's ignition and any accessories
• Locate the fuse you want to test and remove it from the fuse box
• Set your multimeter to the Ohms or Continuity setting
• Touch the multimeter leads to the fuse terminals
• Check the reading on the multimeter display

A good fuse will typically show a reading close to zero ohms, indicating that it's functioning properly. If the reading shows a high resistance or an open circuit (usually indicated by an "OL" or a beep), the fuse is likely blown and needs to be replaced. Some multimeters also have a built-in continuity test feature, which will beep or light up if the fuse is good. Always refer to your multimeter's user manual for specific instructions on how to perform a continuity test.