Can You disconnect the battery while the car is running?
In theory, if your alternator is providing adequate power to the car while charging the battery, then once the car is started, disconnecting the battery should not cause the engine to stop running.
Why does my car not idle when the battery is dead?
There’s never a good time to have a flat battery, and just when you get that sorted you find the stupid engine won’t idle! I feel your pain, this is exactly what happened to me. So why won’t the car idle after a dead battery? When the car battery goes dead, power to the on-board computer is interrupted.
What to know before disconnecting car battery clamps?
Before you try to disconnect the car battery clamps, you need to make proper preparations to ensure the safety of the process. The first thing you need to do is inspect the battery closely. Look for signs of increased wear or advanced corrosion.
What happens to a car battery when it is not in use?
Keep in mind that even when a car is not in use, certain components—the clock and on-board computer, among other electrical systems—will still drain the battery. So, if you leave your vehicle sitting for too long, once you use it again, it might not start.
There’s never a good time to have a flat battery, and just when you get that sorted you find the stupid engine won’t idle! I feel your pain, this is exactly what happened to me. So why won’t the car idle after a dead battery? When the car battery goes dead, power to the on-board computer is interrupted.
What happens if I Disconnect the battery?
Put the positive terminal in an insulated container so it does not touch anything and two people drive two cars, with one battery. How could disconnecting it be any more harmful then turn the headlights on or off? Removing the battery with the car running is a bad idea.
What should I do if my battery won’t start?
You might try cleaning the battery connections along with the battery to chassis ground connection to see if that makes any difference. If the gauges are controlled by a BCM module then there may be a problem with it. By pulling the fuse for the memory power to the module that would reset it and possibly verify the trouble is with it.
What happens if I unhook the battery while the car is running?
Here’s the rub: the alternator’s regulator can only react so fast to a massive step change in load, such as when you unhook the battery while the car is running. (Especially if it’s a flat battery — if you are going to unhook the battery on a running car, make sure it’s fully charged first!)