Can a Car Jumpstart a Semi Truck?

It’s a question that many people have been asking for decades.

The answer is, in short, yes.

In order to jumpstart a semi truck with a car, you will need jumper cables and another car of similar size and power. This is because the voltage of the battery in the semi truck is much higher than that of your standard car battery.

To get the necessary power to turn over the semi truck engine, you must connect the two batteries together in series and draw power from both sources.

When connecting the cables, it’s important to ensure they are connected correctly to avoid sparks or any other issues that could cause damage to either vehicle. Connect one end of the red cable to the positive terminal on the semi truck battery, then connect one end of the black cable to negative terminal on your car battery. Then connect the other end of each cable to their respective terminals on your car battery.

Once everything is connected correctly, start your car and allow it to idle for a few minutes before attempting to start up the semi truck. This will give it enough time for its alternator and starter motor to get enough juice from your car’s battery so that it can start up successfully.


Yes, it is possible for a car to jumpstart a semi truck with some patience and care. Just be sure you have jumper cables and another vehicle of similar size and power nearby before attempting this procedure.

When connecting them together, make sure you do so carefully as improper connection could cause sparks or other issues that could damage either vehicle. With these precautions taken into consideration, you should be able to successfully jumpstart your semi truck with your car!

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Susan Delgado