1. Safety first: Ensure that both vehicles are parked close to each other, but not touching. Turn off the engine, remove any loose clothing or jewelry, and make sure there are no flammable substances nearby. Also, ensure that both vehicles are in park (for automatic transmission) or neutral (for manual transmission) with the parking brakes engaged.
2. Locate the batteries: Open the hood of both vehicles and identify the battery terminals. The battery is usually located near the front of the engine compartment and is marked with a positive (+) and negative (-) sign. The positive terminal is typically red and may have a plus sign (+) or the letters "POS" or "P." The negative terminal is usually black and may have a minus sign (-) or the letters "NEG" or "N."
3. Connect the jumper cables: Take a set of jumper cables (also known as booster cables) with appropriate length and gauge for the task. The cables should have insulated clamps at both ends. Follow these steps to connect the jumper cables properly:
Red (positive) cable: Connect one end of the red cable to the positive terminal of the dead battery.
Red (positive) cable: Connect the other end of the red cable to the positive terminal of the donor vehicle's battery.
Black (negative) cable: Connect one end of the black cable to the negative terminal of the donor vehicle's battery.
Black (negative) cable: Connect the other end of the black cable to an unpainted metal surface on the dead vehicle's engine block, away from the battery and any moving parts. This acts as a ground connection.
Ensure that the cables do not touch any moving parts or come into contact with each other.
4. Start the engine: Start the engine of the donor vehicle and let it run for a few minutes. This allows the donor vehicle's battery to transfer its power to the dead battery.
5. Start the dead vehicle: Attempt to start the engine of the dead vehicle. If it starts successfully, leave it running for a few minutes to allow the battery to recharge. If it doesn't start, wait for a couple more minutes and try again. If the dead vehicle still doesn't start after several attempts, it may require professional assistance or a battery replacement.
6. Disconnect the jumper cables: Once the dead vehicle has started, carefully disconnect the jumper cables in the reverse order of connection:
Black (negative) cable: Remove the black cable from the engine block of the previously dead vehicle.
Black (negative) cable: Remove the black cable from the donor vehicle's negative terminal.
Red (positive) cable: Remove the red cable from the donor vehicle's positive terminal.
Red (positive) cable: Remove the red cable from the previously dead vehicle's positive terminal.
Take care to avoid touching the clamps together or allowing them to touch any metal surfaces.
7. Keep the engine running: Leave the engine of the previously dead vehicle running for a while to allow the battery to charge further. Consider driving the vehicle for at least 15-20 minutes to ensure a decent charge.