How to Jumpstart a Car: A Step-by-Step Guide

April 10th, 2026 by

2026 Subaru WRX

Photo Source/Copyright: Subaru

 


 

 


What You Need to Jumpstart a Car

To get started, you’ll need a few essential items:

  • Jumper cables: Ensure they are in good condition.
  • A second vehicle: This car should have a fully functioning battery.
  • Optional safety gear: Consider wearing gloves and safety glasses for protection.

Safety Preparation

Before jumping your car, safety is paramount. Make sure to park the vehicles facing each other without touching. Turn off both engines, engage the parking brakes to prevent any movement, and open the hoods to access the batteries. Identify the positive (+) and negative (-) terminals on both batteries, and check for any corrosion that could interfere with the connection.

Step-by-Step: How to Jumpstart a Car

1. Connect the Jumper Cables:

  • Start by connecting the red cable to the positive terminal of the dead battery, then connect the other end to the positive terminal of the working battery.
  • Next, attach the black cable to the negative terminal of the working battery and the other end to an unpainted metal surface on the dead car.

2. Start the Vehicles:

  • Begin by starting the working car and let it run for about 2–5 minutes to charge the dead battery.

3. Start the Dead Car:

  • Attempt to ignite the dead car. If it doesn’t start, wait a moment and try again.

4. Disconnect the Cables:

  • Once the dead car is running, carefully remove the cables in reverse order. Be cautious not to let the clamps touch each other.

5. Let the Car Run:

  • Keep the revived car running for 15–20 minutes to help recharge the battery further.

What If Your Car Won’t Jump Start?

If you encounter issues such as a clicking noise or the car dies shortly after starting, there may be underlying problems. A clicking sound could indicate a starter issue, while electrical systems functioning might point to ignition or battery difficulties. If the car won’t hold a charge, the battery could be faulty.

Common Causes of Jump-Start Failure

Jump-starting can fail due to several issues, including:

  • A dead or damaged battery.
  • A malfunctioning alternator.
  • Corroded or loose terminals.
  • Broader electrical system issues.

When to Call a Professional

If you face repeated failures even after attempting to jumpstart your car, or if you find yourself stranded with no help in sight, it may be time to contact a professional. This is especially crucial if you suspect any significant mechanical or electrical issues or need a battery replacement. Remember, preparation and safety are key to successfully getting your vehicle back on the road.

 

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