Why do I put the battery disconnect on the negative terminal?
That’s not entirely correct, but the real reason why I always put the disconnect on the negative (ground) terminal is that if you disconnect the positive terminal, a wrench dropped on the positive terminal will still arc if shorted to ground. That will not happen if the negative side is disconnected.
How long should battery be disconnected to reset ECU?
1 Open up the hood. 2 Remove the positive terminal cable from the battery using your pliers or wrench. 3 Go to your fuse box in your car, and look at the diagram. Select the fuse that is labeled “ECM” and remove this fuse. 4 Keep the car disconnected like this for two to three minutes to clear the computer’s memory.
What should I do if I Disconnect the battery cable?
Disconnecting the battery cable or not probably won’t really matter, but make sure everything is off in the car, and unplug any chargers/accessories plugged into lighter plugs, and make sure anything you’ve added on is disconnected or turned off before leaving your vehicle.
Can a car battery drain if I Disconnect only the positive lead?
No, it won’t drain overnight if you disconnect the positive lead. However, it’s very bad practice & can be dangerous, assuming the car is negative earth/ground. NB: Just about every car built since about 1965 is negative Earth.
That’s not entirely correct, but the real reason why I always put the disconnect on the negative (ground) terminal is that if you disconnect the positive terminal, a wrench dropped on the positive terminal will still arc if shorted to ground. That will not happen if the negative side is disconnected.
What’s the best way to disconnect a battery?
Follow these tips to keep your battery—and your hands—in tip-top shape. Q: A friend of mine told me that I should always disconnect the positive terminal of the battery first to keep the electricity from spilling out of the battery. I can’t see how this would matter. I just unhook whichever terminal is closest first.
How long does a car battery last after you disconnect it?
If You’re Storing Your Vehicle. A Final Note: If you’re removing the battery cables to store your ride for an extended time, know that a fully charged battery will hold its charge for six months to a year if you disconnect the negative cable.
What kind of wrench do you need to disconnect a car battery?
You’ll have to borrow the wrenches from a friend or relative or buy a set. Most but not all battery-cable clamps have 10-millimeter bolts, so you’ll likely need a 10-millimeter open-end wrench to disconnect the cables.