Which Way To Disconnect Car Battery. Once the clamp is off move it safely out of the way. Take caution at all times to never touch a metal object to both terminals of the battery at once.
Turn the ignition key or press the ignition button of the car with the dead battery. If you disconnect the positive end instead the wrench could accidentally contact with another part of the vehicle and might blow a fuse which damages the. The positive cable will be coming from one side of the engine bay and the negative cable will come from the other.
Start with the negative terminal and disconnect the negative battery cable.
A shorted car battery can easily deliver several hundred amps -- more than an arc-welding machine. Usually car owners disconnect car battery negative only so the battery can separate from the chassis. Clean the battery posts and terminals with the post and terminal cleaning tool so you have a good connection. When you disconnect a car battery loosen the negative terminal first.
