![]() ![]() So depending on how weak your battery is, you could end up with two weak batteries.įor example, if you have a good 12v battery, connect it to a battery with only 8v. When you are connected only to another battery and do not replenish that power, the weak battery will eventually take only so much before both batteries are equal in voltage. In the case of being connected to a charger or shore power, there is a constant flow of power going to the weak battery. When you are charging a battery from another battery, shore power, or even a battery charger, power flows to the dead battery by a wire. Whether you have a deep cycle battery or even an AGM battery, your voltage is the same at 12V. Voltageīoth your tow vehicle and RV battery are 12V. However, there are limitations in voltage that we will discuss further. This may sound great, and it will fix all of your RV battery issues. So when you connect your trailer to your truck, you create a battery charger. These are pins only used as needed when driving. This pin is powered directly from your truck battery and is constant power as opposed to brake and running lights. You can check this with a volt meter to show you are getting power even when the truck is not turned on. One of the pins is specific to providing constant 12V power to your battery. This means it’s possible to power functions such as reverse lights, brake lights and brake controller activation without having to rewire your vehicle or trailer separately. For starters, the 7 pin connector uses various pin connectors to wire certain components. Final Thoughts How you can use 7 pin to charge your batteryĮach pin of your connector has a special function and job related to giving power as needed.How you can use 7 pin to charge your battery.We will review the advantages and disadvantages of each method and how well they work. It can also work even if you are not driving your truck and are connected to a trailer, camper or travel trailer. Charging your trailer battery with a 7 pin plug is a great way to keep your battery topped off as you drive your tow vehicle. ![]()
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