Why Car turn over with jump?

A car turns over with a jump when an external power source, such as a battery or another car, is used to provide electricity to the starter motor. This is done to assist the car's own battery, which may be weak or dead, in providing enough power to start the engine.

The process of jump-starting a car involves connecting the positive (+) terminal of the external power source to the positive (+) terminal of the car battery, and the negative (-) terminal of the external power source to a metal part of the car's engine, such as the alternator bracket. This creates a circuit that allows electricity to flow from the external power source to the starter motor, which then engages the engine and starts it.

Once the engine is running, the external power source can be disconnected and the car will continue to run on its own power. It's important to note that jump-starting a car should only be done if the battery is the only problem preventing it from starting. If the car has other underlying issues, jump-starting it may not resolve the problem and it may be necessary to have it diagnosed and repaired by a mechanic.