What happens if you hook up battery backwards?

When a car battery is connected backward, a fuse designed to protect vehicle electronics should blow. If your vehicle doesn’t have a fuse (almost all cars do) designed for this purpose, you will send electrical current backward through systems in your car, including ECU, transmission control unit, and more.

What happens if you cross battery terminals?

Connecting the positive terminal of each battery to the negative terminal of the other battery will result in a huge surge of electrical current between the two batteries. The heat can melt internal and external battery parts, while the pressure from the hydrogen gas can crack the battery casing.

Can you plug in RV without battery?

You can run a camper without a battery as long as you have plugged your camper into an alternate power source. This means that the camper will run off the power supplied by a 120-volt outlet. There are some exceptions to this, depending on your camper’s setup and how you use it.

What happens if you connect negative first?

If you first connect the negative cable, then when you connect the positive cable there is a chance the wrench will complete a circuit between the battery and the chassis of the car. This will at a minimum generate a spark, but that spark could eject molten metal toward you causing injury.

Is it bad to leave your RV plugged in all the time?

If you leave your RV battery plugged in after it’s fully charged, it can deplete the cells’ electrolyte levels. Overcharging is common when RVs are left plugged in without a battery tender for months on end, so be careful, especially when storing RVs over the winter.

What happens when the RV converter goes bad?

First, if the cooling fan, internal vents, or interior lights aren’t working properly, there may be an issue. Second, if you see abnormal flickering or dimming of lights on the dashboard or around the RV, it could be caused by converter problems.

What happens if you connect negative battery terminal first?

It is only a safety issue. If you first connect the negative cable, then when you connect the positive cable there is a chance the wrench will complete a circuit between the battery and the chassis of the car. This will at a minimum generate a spark, but that spark could eject molten metal toward you causing injury.

What happens if the battery connections are reversed?

Reversing the battery connections is not too uncommon. If the key is off the damage is often just fusible links and fuses and the alternator. If, however, the key is on a great deal of damage can be done. Many relays, the computer, the ignitin switch, etc.

Why does my RV battery drain when not in use?

Your propane gas detector, smoke detectors, and other devices will always be on when the battery is connected and providing power. If your battery is not disconnected in storage, and the RV is not connected to shore power or solar power to charge the battery, then these drains can actually discharge the battery while the RV is stored.

What happens if you jump a battery backwards?

I jumped a battery backwards once (I was real young) it sounded like a .45 went off, blew the tops off the battery and split the case, very dangerous. Thanks for the feedback. The old battery was put in backwards but hooked up correctly. The new battery was put in correctly but hooked up incorrectly. Hope that’s clearer.

Do I need to reconnect the battery before using the RV?

One caveat, make sure that you reconnect the battery before using the RV, as without it, none of your electrical devices will operate, especially the propane and smoke detectors, which can be dangerous.