Put a continuity check on it. This can be done with an ohm meter. If there is no reading then the fuse is open.
Test it with an ohm meter.
take it off and test it with a volt meter.
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.
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.
Remove the blown fuse. Replace it with a new fuse.
A fuse is a deliberate weak link which will be blown if there is a power overload. When you blow a fuse, take the blown fuse out and throw it away as you would a blown light bulb, and replace it with another fuse of the same type. * In the old-timey fuse boxes a penny could be substituted for a fuse, but a penny is too strong to be blown, and the next overload will burn the house down.
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
It is called a blown fuse.
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/
Either blown bulbs or blown fuse check for blown fuse first under hood in fuse box labled taillights
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