The first check to do here would be to look for corrosion on the circuit board – if that is present, then it’s the most likely cause of your charging issues. Such problems can include anything such as a blown fuse, a burned resistor or diodes, as well as corrosion on the circuit board itself. This means that simple circuit board issues can very easily screw everything up and explain why the battery isn’t charging. When it comes to a vehicle’s electrical system and battery, everything is managed by the onboard computer. However, we do recommend seeking a professional’s help in this case as replacing a thermal sensor is a bit challenging. If that turns out to be the issue, you’re going to have to get a new sensor. If the fan is all right, check the thermal sensor with the multimeter too. If not, you are going to have to replace it. Then, inspect the converter’s cooling fan as that’s the more likely culprit – put a multimeter onto the fan’s power source and see if it’s receiving any power. The first step here would be to just look for any damaged wires, a burned smell, or anything that seems to be out of the ordinary on and around the converter. So, what should you do if you suspect an issue with the converter’s components? The solution: The thermal sensor’s task, on the other hand, is to notice when things are out of order and signal you in time. The former is responsible for keeping the trailer’s internal components cool and functioning as overheating can easily lead to short-circuiting and other issues. The second common place to look into for answers is the RV converter – namely, the converter’s cooling fan and the converter’s thermal sensor. There are issues with the trailer’s converter Plus, even if the corrosion wasn’t all that major and you’re certain it’s not the issue, it’s still a good idea to clean it before it’s turned into a whole new problem. ![]() If the battery still isn’t charging, you can still try any of the other steps below. Then, just try to charge the battery again – in most cases, that should be enough to fix the issue, especially if the corrosion was indeed significant. After you’ve cleaned all the corrosion properly, you can also apply a standard battery corrosion protection spray of some kind to avoid or at least delay future corrosion problems. You can also try getting a commercial corrosion removal product but soda or vinegar usually work just fine. You can do so with baking soda, vinegar, and/or with some brushing too. If the corrosion and dirt on the battery’s cables and terminals are noticeable, you’d do well to clean it properly. Then, pop the vehicle’s hood and look at the battery’s terminals. To do that, remember to first turn off the engine and make sure there’s no risk of accidents. But what should you do if the battery’s terminals are already corroded to the point of the battery not functioning properly? The solution: You store the battery in a discharged state (which is why even unused batteries often get corroded)Īvoiding these issues is crucial to avoid corrosion and other battery problems.The battery’s electrolyte levels drop below the lead plate and the plates get exposed to air.Still, prevention is important too as that sulfation will happen faster and to a much great degree if: That’s because it’s due to the continuous process of sulfation which occurs as the battery goes through its discharge and charge cycles over and over again. ![]() Such corrosion is generally likely to appear on most batteries over time, especially if you use the vehicle regularly. The first troubleshooting step, therefore, is simple – look for noticeable corrosion and dirt on the battery connections and cables. Probably the most common reason why a battery isn’t charging properly is dust, dirt, debris, or corrosion present on the battery terminals and battery cables. The battery’s terminals are dirty and/or corroded As far as fixing a trailer battery that’s not charging, however, the difference between these battery types really isn’t all that significant. Flooded lead-acid batteries are probably the most widespread but there are also lots of valve regulated lead acid (VLRA) batteries, as well as gel batteries out there.įor future purchases, we’d recommend VLRA or flooded lead-acid batteries over gel batteries – the latter is great for marine applications but aren’t ideal for RVs. The first thing to note is that there are actually many different types of batteries a trailer can have. In conclusion – what to do when you’ve got a trailer battery not charging?.Why is my trailer battery not charging?.
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