Usually, the metal inside the plastic enclosure will have a U shape. If the fuse is blown, the curved part of the U will be missing, and the plastic will look a bit discolored/ or it will even be black depending on how hard of a load the fuse got before it burnt out.
You know your car has blown a fuse if whatever the fuse is for suddenly quits working. For example if your radio is playing and for no reason quits it may be a fuse has blown.
Tail lights are usually on the same fuse with interior lights and dash lights. That is so you will know when the fuse is blown. Brake lights are usually on a different circuit. If a fuse is blown, try to figure out the cause rather than just replacing the fuse.
Pull it out an look at it. Most of the time you can easily see it is blown. If not check it with an ohm meter.
Put a continuity check on it. This can be done with an ohm meter. If there is no reading then the fuse is open.
You can easily replace it but you need to know why it blew in the first place. All fuses are marked on the fuse box or in the drivers manual as to which circuit they protect. Determine which circuit that blown fuse protects and inspect that circuit for troubles.
the amp wont work.Check the power fuse first.If this is ok, there is generally another fuse inside the amp that will need checking
In the event that you are discussing a wire free close by the circuit might look great with the visual test then, at that point, still coherence/ohmmeter test is required. Read More.. universalhc.ca/how-do-you-know-if-a-fuse-is-blown-in-the-furnace/
IS THE FUSE IN IT BLOWN? If not get a battery and a test light. You will probably have to cut the fuseable link out. touch one wire end to the battery and make a circuit with it, if the test light doesn't light up and the fuse isn't blown it is bad
if you know what fuse it will be blown if you look at it the small wire inside will be broke may even blacken the sides if not get a haynes manual from and local car shop and there will be diagrams in there for you to find the right fuse that may be broken but the biggest give away is that what ever it fuses wont work !
your fuse is blown. car manufacturerers make the dash lights go off when the tail light fuse blows so you know it is blown.
It is important to know when car parts quit working, and why. A faulty voltage regulator, blown fuse, or the wiring to the battery can cause this problem.?æ
The most likely cause is the blower motor, if you unplug it and the fuse doesn''t blow you will have an answer.