Turn the car and the equipment that the fuse is a part of off. How to use a voltmeter to test a fuse block.

Step By Step Guide To Test For A Blown Fuse Swe Check

Both sides of a good fuse will show power usually indicated by a red led.

How to check car fuses with voltmeter. On the other hand you can test whether a coil relay is in good condition or just not anymore. To make sure the fuse is blown you can change the multimeter set to the setting to measure the current which is the arrow with a line. Turn off the engine.

Find the bad fuse with a multimeter. Conversely if you don t detect continuity in your multimeter then it s a blown fuse. Listen for the multimeter to beep continuously as you hold the probes against the fuse.

Steps to follow when testing car fuses with a multimeter. Once you have located the poles take the probes and place them on the negative and positive sides of the fuse. If you can detect continuity on your multimeter then it means the fuse is good.

Locate the fuse block on your vehicle with the help of a work light or flashlight the main fuse block is usually located underneath the dash. Turn on your multi meter and set the selector to ohms which is the setting that measures resistance. Now put the positive and negative leads together and look at the reading being shown.

After you do this remove the fuse by gently pulling it out of its slot. Then probe both sides of the fuse. If it beeps continuously then the fuse is fine but if it does not emit a sound then the fuse is blown.

Before you even start using your multimeter to test whether or not the fuses of your car are functional you need to. If you hear a beeping sound and see a sign on the screen of your multimeter you know that the fuse is in working condition. A high impedance led test light is one of the easiest ways to check automotive fuses.

Connect the test light s clips to power and ground such as in the power outlet or directly to the battery terminals. If you re using a digital multimeter set to measure resistance touch the probes together to get an initial reading. You can then touch the probes to the prongs on the fuse in the same way.

If you don t hear any noise coming from the meter then the fuse is blown and should be replaced. Then you must connect each of the multimeter probes to each end of the fuse.