Blown Ceramic Fuse Look Like

A ceramic fuse is built to withstand high temperatures.

Blown ceramic fuse look like.

If the fuse is open then the next step is determining what caused the fuse to blow. Remove the fuse that you suspect to be blown and visually inspect the center element through the case. Although it is fairly easy for a practiced eye to identify car fuses on sight you can also look at a visual guide to help determine which type of fuse you need to. The film is formed when a short circuit melts the fuse element causing a deposit to be seen on the inside of the fuse barrel as a film.

Use the testing probes of the voltmeter to test the metallic ends of the fuse. T2a250v f1a250v that s fuse rating t is for slow blow fuse and f for fast blow fuse 2a or 1a is amperage rating its usually just number and a 250v is voltage rating its number and v and then just measure the size of fuse in small electrical device is. Blade fuses are sometimes physically difficult to pull out but most vehicles come with a fuse puller tool that is located inside one of the fuse boxes or attached to a fuse box lid. Testing a ceramic fuse is the only way to tell if the fuse has blown.

Another thing to check. To do this use a voltmeter ohmmeter. The melting action often causes discoloration of the case and the center element should have an obvious break. You need to test whether the ceramic fuse has blown.

This is necessary for ceramic fuses since they don t develop a blackened appearance like blown glass fuses. Check one cap on fuse pcb or manual for fuse ratings there should be written something like. A ceramic fuse however shows no damage upon visual inspection. If you see any loose objects they might be the source of a short circuit.

Look for a small square opening on the top of the fuse above each blade. If you have a blown fuse take a look at the other circuitry without touching it. A homeowner can determine if a glass fuse in blown by performing a visual inspection and looking for a break in the thin wire and a brown discoloration in the center of the fuse.