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Asked by: Petre Dudnik
automotive road side assistanceWhy would a car not start with jumper cables?
Inexpensive jumper cables that are not thick enough to carry sufficient current won't perform to the level you expect, and your car won't start after a jump. Cables that are too long have more internal resistance, and they may not transfer enough of the donor battery's power to your car.
Moreover, what happens if you jump a car that's not dead?
But if the “dead” car cranks vigorously and just doesn't start, the problem is probably something other than the battery, and jump-starting will not help. In fact, the more charge remains in the discharged battery, the quicker the jump-starting process will be.
Furthermore, can you jump a car that is completely dead?
Yes you can bring most even really dead batteries back to life with a jump from a running car. However note that most cheap battery jumper cables don't carry enough current to make this happen very quickly.
Caution: Don't attach the negative cable to the negative terminal of the weak battery when jumping a car battery! This common mistake could ignite hydrogen gas directly over the battery. Battery explosions can cause serious injury. Finally, remove the positive cable from the car with the weak battery.