Jumpstarting a car with an automatic transmission is a bit different than jumpstarting a car with a manual transmission. While the basic principles remain the same, there are some crucial steps to follow to ensure a smooth and safe process.
Understanding the Differences
The key difference lies in the way an automatic transmission operates. Unlike a manual transmission, where you manually engage the gears, an automatic transmission uses a complex system of hydraulics and electronics to shift gears. This system relies on a battery to power the transmission control module (TCM), which manages gear changes.
Steps for Jumpstarting an Automatic Transmission Car
Follow these steps to jumpstart your automatic transmission car safely⁚
1. Gather Your Supplies
- A set of jumper cables
- A working car with a fully charged battery
- Safety goggles
- Gloves (optional)
2. Park the Vehicles Safely
Park both vehicles on a flat surface and ensure the parking brakes are engaged. Leave enough distance between the vehicles to allow for access to the batteries.
3. Connect the Jumper Cables
Connect the jumper cables in the following order⁚
- Positive (+) cable⁚ Connect the red clamp to the positive (+) terminal of the dead battery.
- Positive (+) cable⁚ Connect the other red clamp to the positive (+) terminal of the good battery.
- Negative (-) cable⁚ Connect the black clamp to the negative (-) terminal of the good battery.
- Negative (-) cable⁚ Connect the other black clamp to a metal grounding point on the dead car’s frame, away from the battery.
4. Start the Good Car
Start the good car and let it run for a few minutes to allow the battery to charge.
5. Start the Dead Car
Attempt to start the dead car; If it doesn’t start immediately, try again after a few minutes.
6. Disconnect the Jumper Cables
Once the dead car starts, disconnect the jumper cables in the reverse order of connection, starting with the negative (-) cables.
7. Let the Car Run
Let the dead car run for at least 30 minutes to allow the battery to charge properly.
Important Considerations
- Safety First⁚ Always wear safety goggles and gloves when working with batteries and jumper cables.
- Avoid Sparks⁚ Do not allow the jumper cables to touch each other or any metal parts of the vehicle while the good car is running.
- TCM Issues⁚ If the automatic transmission still doesn’t shift properly after jumpstarting, it could be a sign of a TCM issue. Consult a qualified mechanic.
Conclusion
Jumpstarting an automatic transmission car is a relatively straightforward process, but it’s crucial to follow the correct steps for safety and to avoid damaging the transmission. By understanding the differences in automatic transmission systems, you can ensure a smooth and successful jumpstart. Remember to always prioritize safety and consult a mechanic if you encounter any issues.