Those extra-long cables will come in handy and make connecting batteries easier if you can't put two cars directly next to each other.
Are you sure you want to delete this answer? Jumper Cables Positive Negative. On the car with the dead battery: Red on positive, black on negative. On the car with the good battery: Red on positive, black on a solid ground connection on the motor - away from the battery terminals.
This so that you don't create any sparks near the battery. Pop open the battery caps on the dead battery to vent any gases that will be generated when you start the dead car. Disconnect wires in the reverse order - remove the black off the motor ground, then good red, then both cables on the formerly dead battery. Be careful around the batteries - there will probably be weak battery acid which can eat holes in your clothes. Jumper Cables and Ohm's Law?
Jumper Cables and Ohm's Law -- please help my understanding!? When i take off the jumping cable the car dies on me again ,do i need to change battery or the alternator? It's best to keep your car running for a good while to help recharge the battery, but you should also consider having its voltage checked to be sure it doesn't need replacing. If you drive a car, you need to know how to use a pair of jumper cables.
Begin by parking the vehicle with the good battery next to the car with the dead battery. Open the hoods of both cars and locate their batteries. If the batteries are covered by plastic hoods, remove the hoods so the battery posts are exposed. The positive post may be red, but it's not always, so it's best to look for the plus or minus sign to determine the post's polarity.
Before you attach the clamps, be sure to remove any dirt from the posts. Make sure that the clamp is firmly connected. Connect one of the black clamps to the negative - post of the good battery. Make sure the clamp is firmly connected. But instead of connecting the other end of the cable to the negative post of the dead battery, clamp it to a bare, metal surface on the engine of the dead car — like a bolt or a screw. This will provide grounding for the jump start.
Start the functioning car's engine first and let it idle for a few minutes. Start the dead car's engine and let it idle for a few minutes. If the dead car starts without any issues, carefully disconnect the black clamp from its battery first.
Then disconnect the black clamp from the other car. Finally, remove the red clamp from the good car's battery and then from the once-dead battery.
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