#40 amp fuse blown how to

Once you’re done connecting the probes to the fuse ports, verify if the reading aligns with the initial reading on the multimeter.įor instance, if you had an outcome of 1 ohm and the fuse is also reading 1 ohm on the multimeter, you have a working 50 amp fuse. Ensure that you properly connect the probes to get the result once and for all. Now, connect the black and red probes from the multimeter to the ports at the back of the fuse. Once the device displays a particular reading (say 1 ohm), ensure to note it because you will need this result to ascertain whether the multimeter is working or not. So, ensure to get one from a friend or buy a personal multimeter at an auto accessories shop.Īfter that, turn on the multimeter and touch the black probe against the red probe to get a specific reading. Get a working multimeterįirstly, you need a working multimeter to enable you to test your car’s 50 amp fuse. So, follow the procedure below to test a 50 amp fuse. Testing a 50 amp fuse before opting for a replacement is necessary otherwise, you may as well waste your hard-earned money replacing a working fuse due to a slight malfunction.

#40 amp fuse blown how to

So, you may want to find out how to test a 50 amp fuse in order to ascertain whether you have a bad or working fuse. However, when a component draws beyond the necessary amount of voltage, it will burn the fuse and create an open circuit instead of crossing over to damage the electrical component. Any electrical component that utilizes up to 50 amp is surely powered by a 50 amp fuse.Ī car with an idling engine (with no accessories or lights on) utilizes between 35 and 50 amp. It is typically labeled “B+” connoting battery positive. This time, our focus is on the 50 amp fuse in your car.Ī 50 amp fuse has the capacity to feed multiple circuits in a car simultaneously. This is a major role that several fuses play in protecting various electrical components in your car from unexpected damages.įuses are also used in other electrical appliances for the same purpose hence, this component has a wide range of usage beyond the automotive industry. However, it’s important to note that an excessive voltage will not blow the fuse unless the component draws excessive current. The intervention of the 50 amp fuse is to ensure that the excess voltage does not damage the component it was assigned to protect. It intervenes by melting or burning when the power from the battery exceeds 50 amp, which it cannot accommodate. The fuse is designed to stand as a bridge between the current from the battery and the electrical components it powers. You may have to put aside every other distraction so that you can digest the following sections properly.Ī 50 amp fuse serves as a shield against excessive voltage transmission from a vehicle’s battery directly to specific electrical components like the tail lamp, air conditioning system, horn, cabin lamp, etc. Here, the crucial pieces of information are put together to help you identify what a blown 50 amp fuse actually looks like.

So, what does a blown 50 amp fuse look like? Does that sound like your contemplation? Fortunately, a blown fuse has a couple of manifestations that can help you detect one. However, they can burn when you least expect it. So when you start and need a high current because of the cold engine maybe a wire of a coil get to hot, expand and touch the case or another wire, causing a very high current -> and blow the fuse.Do you know that fuses don’t have a specifically guaranteed lifespan among several components in a car? Of course, they can sometimes last for months and sometimes for years. If so, maybe then your starter has overheatet and the coil's are damaged inside. Does the engine has the same power as before? Is the engine easy to turn, if you remove the glow-pluges? There should be only a small difference in the values.īut if you are telling, that the fuse blows after the engine was turned off for a while, I suggest, that the cold engine forces the starter to much now after your problems with overheating. Or you can do it the way you suggested, check the voltage at the battery and if possible between the Selonoide and the starter. Maybe you have to switch on the beep with the button with a beep symbol. You will see the resistance and maybe also hear a beep, if you have a very low resistance. If you want to check continuity you need to turn the Metex to the middel white position (Resistor and continuity beep). I just checked a picture of your multimeter.