How do you test a fuse in a panel?

Open the box door and turn on the flashlight to inspect the fuses. Look closely at each fuse. The window on a good fuse will be clear. The window on a fuse that has “blown” to cut off the power and protect the circuit will be cloudy black or gray.

Can fuses be tested?

To test if the fuse is blown, we require a multimeter. Once configured, a multimeter can measure the resistance of the fuse element. Resistance is measured in Ohms ‘Ω’. The following tutorial uses a digital multimeter, however the same principles apply when using an analogue multimeter (ie.

Where do I find the fuse on my car?

Known as a PDC (power distribution center) or fuse and relay panel which can be identified by having a black plastic cover over the top or side of the panel. Each car is different, an owners manual will indicate the location and fuse designation.

What should you consider when testing a fuse?

When testing a fuse, there are two aspects to consider. First, the integrity of the fuse is subject to failure. The second is to confirm electrical power is present at the fuse.

What to do when no power is detected at a fuse?

If no power is detected at the fuse or panel (either side of the all fuses) use a wiring schematic to trace the power source, usually a main power relay, maxi-fuse or fusible link has failed. Watch the videos! Questions? Our team of certified mechanics is ready to answer your questions for free.

How can you tell if a fuse has blown with a multimeter?

Then put the probes on either side of the fuse and check if the reading is similar. If it is, then the fuse works properly. If you get no reading or “OL”, then the fuse has blown. If the multimeter reads “Open” or “Not complete,” it means the fuse is broken.

How do you test a fuse with a test light?

Poke the tip of the test light’s probe into 1 of the holes on a fuse to test it. Pick a fuse that you want to test. Hold the test light by the handle and stick the pointy metal tip of the probe into 1 of the 2 round or square holes on the fuse.

When to test and replace an automotive fuse?

The second is to test for electrical power at the fuse, if the sub-system that powers the circuit is not working i.e. a bad power relay, maxi or fusible link the fuse will not have power and the accessory will not work. What goes wrong? When powering an electrical circuit a designed the amperage to run the accessory is calculated by the engineer.