Many electronic devices use fuses to limit the amount of current that
goes through a circuit. If too much current flows through a circuit, a
fuse is designed to blow, and after that is no longer good and needs
to be changed. But often it’s difficult to tell if a fuse is good or
bad. This video will show you how to test if a fuse has blown.

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46 Comments

  1. I already know my fuse is bad but I can't find a replacement anywhere. The size is 125v1a 51mm. Any help would be appreciated.

  2. Fuse in my solid-state amp appears to be in perfect condition. Amp immediately powers off upon pressing the power switch or using the remote. Anyone know what might be the problem?

    The other problem is the location of the fuse. It is very tightly-placed between the power supply and a board. Any tips for how to removing it without damaging anything?

  4. Completely useless video, just like all others I've seen. My multimeter does not make sounds, so I must see the numbers, but your hand was in the way on every test.

  5. Conceptual continuity is something completely different. According to a dog whom Frank Zappa met. It should be easy to see, the crux of the biscuit is the apostrophe.GoodI'm

  7. In sure if one owns one of those fangled gadgets already they'll know how to test a fuse with it. What about us that don't own one of those and have 1 fuse to test?

  9. Just put more current through it than it is rated for, and if it blows then you know it was good.

  10. My fluke screams, not beeps? It just a continuously beep. But other stuff its just a single beep…

  11. Hi Geo. Great video. How do we test MOV varistors and thermistors? Not one person has a clear video and yours is so helpful so I'm reaching for help please. (Like the explanation on continuity, speakers! Great!)

  18. Isn't cheaper to just replace the fuse if you think it might be blown than buying a tester?

  20. It's actually best to test fuses by using the Ohm setting on the DMM. There are circumstances where the fuse can be blown but still have continuity.

  21. Dumb question but buss fuses those small metal round tip glass ones does it matter which direction they go in?

  27. Hi, I want to ask you, I have got fuses 10 amp 250v. I want to use it on my car (with 12v connection). can i use? please explain me

  37. yes. i agree with BRAD noah. this is the first time i understood the video without playing it again. thanks a lot

  38. for all those who are asking, fuses go in between the power source, and the device being powered

  39. Dude – I thought you'd have gone into a bit more detail than you did, but thanks just the same. I need to know more details about replacing these little critters. Especially one for a Craftsman 4-gallon 125 psi pancake air compressor. It's a half-size glass fuse but with a white opaque material which made the continuity test the only way to determine it was blown.

  41. Thanks for the video. Helped me determine my fuse was in fact blown, even though it looks fine. The store is 30 mins away, so Im glad I found this video lol.

  43. How can I identify what 'Amperage' a fuse is apart from looking at what's stamped into the terminal?

  44. how i can calculator a fuse if i need to know how may Ampere to protect my fuse is he a formula to calculate. …..

  45. I hace a RCA HTS ii is a 120v but i do not hace time to go to The supply store so the question is. ¿can i use a 250v fuse for my 120v. Fuse dvd power supply

  46. My problem is that I think the fuse has blown in my multi-meter haha

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