Can you reset a check engine light by disconnecting the battery?
Leaving the battery disconnected for about 15 minutes will ensure the vehicle systems will completely reset when you reconnect the battery. Disconnecting the battery will clear the error codes and reset the check engine light.
Should I disconnect battery if car parked long term?
If you don’t have access to an outlet – say, in a long-term airport parking lot – your second option is to disconnect the battery. That’ll preserve the battery’s charge, so when you reconnect it, the truck should start right up.
Can I disconnect my car battery to keep it from dying?
When you disconnect your car battery from the car, it helps prevent the electrical systems including the clock and on-board computer system from draining it completely. Therefore, if you leave the car battery unattended for longer period, then it might damage the battery and even need replacement.
Should I disconnect my car battery before charging it?
Disconnect your car battery. Although charging a car battery while still connected or in situ is possible, it’s always a good idea to disconnect the battery before charging after a quick clean.
Can I just disconnect positive terminal?
No, it won’t. You can disconnect whichever terminal you want, or even both, it won’t discharge. Whichever one you choose results in an open circuit so no current can possibly flow.
What happens if you disconnect positive first?
It’s important to disconnect the negative side of the battery first, otherwise you can cause an electrical short if the positive is removed first.
What happens when you disconnect positive first?
Theoretically, if one were to disconnect the first positive cable first, then simply inadvertently touching any metal part with the DISCONNECTED positive cable could cause a short to the other battery whose pisitive terminal is still connected.
What happens if you take the positive terminal 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.”
What happens if you remove the negative terminal first?
Expert Reply: By removing the negative battery cable you are disconnecting the battery from the chassis of your vehicle. If you begin to remove the positive side before the negative and your wrench would make contact with any part of the vehicle, then you could cause a short in the system.