Will a car stay running if you disconnect the battery?
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. …
What happens when you disconnect the battery?
Disconnecting your car battery will not cause any permanent damage to your computer or ECU (electronic control unit), but it can have some adverse effects. Those include canceling your preset radio stations, forgetting learned shift points, and your car’s ideal fuel/air mixture.
When disconnecting a battery which lead do you take off first?
“Positive first, then negative. When disconnecting the cables from the old battery, disconnect the negative first, then the positive. Connect the new battery in the reverse order, positive then negative.”
Do you need to know before you disconnect a car battery?
So, before you disconnect a car battery; there are things you need to know. Battery voltage MUST be maintained to the (PCM) and other modules; while the battery is disconnected. NEVER: disconnect the car battery; while the engine is running or the ignition key is turned on.
When to turn on the battery disconnect switch?
After unloading and cleaning following a trip, simply turn the RV battery disconnect switch on. This will leave the battery in the same state of charge in which you leave it while activating the disconnect switch.
Why does my RV battery disconnect not work?
Even after ensuring proper installations, your disconnect switch may not function. There can be many reasons for it. A drained battery at the time of activating the battery isolation is a valid one. In that case, your RV may not turn on even with the disconnect switch off. You will need to recharge the battery before you can move.
What happens when you disconnect an alternator battery?
If disconnecting the battery interferes with the voltage regulator’s control voltage input, it’s possible for the alternator voltage to go way over the top (I’ve heard some say hundreds of volts), frying everything. Even the initial premise was wrong.