![]() This is a common problem that can arise when there is an issue with the converter. This will help you see where the problem may lie if one of the replacements blows when inserted correctly into its spot. If the fuse remains good, start replacing all the fuses one by one. There are many other sources for this problem, and one solution would be to take out all 12-volt fuses, then place a good one in the battery spot. The charging module in the converter may be bad, or the converter itself is becoming faulty. If it is too powerful, it is pushing too much electricity to the battery and blowing the fuse. Then, the problem source may be with the converter. This may take some time to find, and you would have to have the right multimeter to discover the location. A hydrometer is needed, and you need to check the gravity of each cell.Īnother source for this problem will be a short in the 12-volt system. If you suspect the last one, then you have to check each cell individually. Then there could be a problem with the battery.Įither it is not fully charged, incapable of charging, or there is a bad cell. The polarity issue simply means that the battery wires got crossed somehow, and that is understandable as sometimes battery cable colors are not always clear. If the fuse continues to blow after being replaced by new ones, then you know you have a severe problem on your hands. There are many reasons why a fuse will blow. That is when you have to pull out your multimeter and do a little testing. ![]() With that said, there are those fuses that are not transparent, and they do not look bad at all. Not every time, but sometimes that burn mark will appear, letting you know very clearly that the fuse is not usable anymore. If you see a little break in that thin line, then the fuse is bad. But if you see an unbroken line between two points, then the fuse is good. Inside the more modern styles, the elements may be hard to see. The newer ones may be color-coded, but they may also be very small. These are usually on the older traditional style of fuses. On certain glass fuses, you can see a burn mark as well as the broken element. Also, some fuses are not transparent, which means mere looking will not help you make the proper diagnosis. The reason for this is because the elements may be too small to see accurately. Sometimes it is hard to tell what a blown fuse looks like. If the reading says 1 or 100%, then the fuse is bad. There should be a change in the reading if the fuse is good. You do not have to pull the fuse to test it, but if you leave it in place, make sure the power is turned off. Just make sure one is on each end.Īlso, make sure the fuse ends and the lead ends are clean, so you get an accurate reading. There is no polarity to worry about here, so it does not matter which ends you place the leads. Then place the fuse on a non-conductive surface and touch the leads to both ends. Once you are connected, make sure to turn the meter on, and sometimes that just means moving the dial to the 200 ohms option. If you are not sure which one that is VΩmA underneath it. The black lead needs to be connected to the COM or common socket while the red lead is placed into the ohms socket. This resistance is measured in ohms, and that is the section you want to turn your dial to before you turn on your multimeter. If you are not familiar with a multimeter or how it works, you have to measure the resistance of the fuse. The best way to tell if a fuse is blown is to use a multimeter. However, the majority of fuses do not come with that glass body, and you cannot see if the fuse has blown or not. Many fuses have a glass body which allows you to see if the element is broken. You will have to test the fuse to see if it is the source of your problem. But that lack of power does not necessarily mean the fuse is blown. The first indication that your fuse is blown will be that you have no power to certain features in your RV.
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