When an auto battery fails it may be dead or weak. A jump-start is often the fix to getting back on the road. Jump-starting is dangerous and must be done properly to avoid injury or damage to the vehicles. Follow the Jump-Starting Safety Tips below when a jump-start becomes necessary.
- Position another vehicle with a healthy battery and your car so they do not touch each other. Be sure both batteries are of the same voltage.
- Read the owners' manuals for both vehicles for any special directions.
- Turn off the ignitions of both vehicles and set the parking brakes. Place automatic transmissions in "Park" and standard transmissions in neutral.
- Wear safety glasses and gloves while using cables.
- Clamp/connect one end of the positive (+) booster cable to the positive (+) post of the dead battery.
- Connect the other end of the same cable to the same marked post (+) of the booster battery.
- Connect the second, negative (-) booster cable to the other post of the booster battery.
- Make the final negative (-) booster cable connection on the engine block of the stalled vehicle away from the battery.
- Start the booster vehicle and let it run for a few minutes. Then, start the disabled vehicle.
- Remove the cables in the reverse order of connection, being very careful not to let the booster cable clamps touch each other or come in contact with car parts. Also, avoid the fans of the engine. Electric fans may run without the engine being on.
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