How to Keep Cigarette Lighter on When Car Is off

Imagine a scenario where you never have to worry about your cigarette lighter turning off when the car does. The convenience of having a constant power source can be invaluable in various situations.

By exploring some practical methods to achieve this, you can enhance the functionality of your vehicle in a simple yet effective way. Discover how to keep your cigarette lighter on even when your car is off and unlock a world of possibilities at your fingertips.

Key Takeaways

  • Use Positap for secure connection to a 12V constant source.
  • Install an inline fuse for safety against overloads.
  • Ensure continuous power supply by connecting to the battery.
  • Test device functionality to confirm uninterrupted power.

Reasons to Keep Cigarette Lighter On

To maintain a continuous power supply for charging electronic devices such as cellphones and GPS units, keeping the cigarette lighter on even when the car is off proves to be a practical and convenient choice. This simple modification ensures that your devices remain charged without the need to turn on the car's ignition, providing you with uninterrupted access to power.

By utilizing the cigarette lighter for continuous charging, you can enhance the functionality of your devices, particularly during stops or when the car isn't in use.

The ability to keep the cigarette lighter on allows for convenient charging without the engine running, which can be beneficial in various situations. Whether you need to charge your phone while making a quick stop or ensure your GPS unit remains powered during breaks, this modification offers flexibility and ease of use.

With continuous charging enabled through the cigarette lighter, you can rely on your devices to stay operational whenever you need them, enhancing your overall driving experience.

Tools Required for the Modification

For this modification, you'll need specific tools to ensure a secure connection and effective tapping into the car's wiring system. When modifying the cigarette lighter to stay on when the car is off, the following tools are essential for a successful outcome:

  1. Positap Part Number PT1218B: This tool is ideal for 12-18 gauge wire and provides a reliable connection without the need to cut any wires. It ensures a secure and reversible modification process, making it suitable for tapping into the fuse box.
  2. 14 AWG Wire**: Gauge considerations are crucial when using Positaps. These connectors can accommodate up to 14 AWG wire size, making them versatile for various projects. However, it's advisable to avoid tapping wires larger than 14 AWG with Positaps for optimal results.
  3. Fuse Box Access Tools**: To tap into the car's wiring system effectively, you may need tools to access the fuse box securely. Ensure you have the necessary tools to open the fuse box and work on the wiring connections with precision.

Steps to Modify Cigarette Lighter

After gathering the necessary tools for the modification, it's crucial to proceed with the steps to modify the cigarette lighter to stay on when the car is off. Begin by identifying a 12V constant source, often found in the fuse panel. Use posi-taps for a secure and straightforward modification process. Ensure to install an inline fuse to safeguard against overloads.

To achieve a constant power supply, connect the cigarette lighter directly to the battery. This direct connection ensures a reliable power source even when the car is turned off. When connecting to the battery, pay close attention to proper wire alignment and connection. It's essential to follow these steps meticulously to maintain the functionality of the cigarette lighter and prevent any electrical mishaps.

Safety Precautions to Consider

When keeping the cigarette lighter on when the car is off, always ensure the positive lead is fused near the battery to prevent electrical overloads.

Avoid leaving any unfused wires connected to the battery for safety reasons.

Consider additional measures like investing in a secondary battery or installing a battery isolator for efficient power management.

Safety Measures

To ensure maximum safety when keeping the cigarette lighter on while the car is off, always fuse the positive lead near the battery to prevent electrical overloads. Here are three crucial safety measures to consider:

  1. Avoid direct connections: Never leave unfused wires connected directly to the battery for safety reasons.
  2. Invest in additional equipment: Consider investing in a secondary battery or a battery isolator, especially for camping trips, to prevent draining the main car battery.
  3. Enhance protection with inline fuses: Install an inline fuse along with the positive lead near the battery for added protection against electrical issues.

These measures will help you maintain safety while using the cigarette lighter when the car is off.

Potential Risks

For optimal safety when keeping the cigarette lighter on while the car is off, it is imperative to assess and mitigate potential risks through thorough safety precautions. Proper power management is crucial to prevent electrical issues and maintain the integrity of the vehicle's electrical system. To minimize risks, always fuse the positive lead near the battery and avoid leaving unfused wires connected to the battery. Investing in a small secondary battery can provide additional power management options, while installing a battery isolator is beneficial for situations requiring separate power sources. By following these precautions, you can reduce the risk of overloads, electrical problems, and potential hazards associated with keeping the cigarette lighter on when the car is off.

Safety Precautions Description
Fuse Positive Lead Fuse near the battery to prevent overloads and ensure safety.
Avoid Unfused Wires Minimize risks of electrical issues by not leaving unfused wires connected to the battery.
Secondary Battery Consider investing in a small secondary battery for additional power management options.
Battery Isolator Install a battery isolator for situations requiring separate power sources, like camping trips.
Power Management Proper power management is crucial to prevent dead car batteries and maintain electrical system integrity.

Testing the Modified Cigarette Lighter

Test the modified cigarette lighter's functionality by plugging in a device and confirming consistent power supply even when the vehicle is turned off. To ensure the effectiveness of the modification, follow these steps:

  1. Connect a device: Plug in a device such as a phone charger or a portable GPS system into the modified cigarette lighter socket.
  2. Verify continuous power supply: Check if the device starts charging immediately after plugging it in and monitor if it continues to charge without any interruptions.
  3. Assess charging consistency: Keep the device connected for an extended period to evaluate if the modified cigarette lighter provides a stable and uninterrupted power supply to the device.

Troubleshooting Common Issues

Check the power source first to ensure the connection is stable.

Inspect the fuse for any signs of damage or wear that could be causing the issue.

Review the wiring connections meticulously for any loose or broken wires that may be disrupting the electrical flow.

Power Source Check

To ensure a continuous power supply for your cigarette lighter when the car is off, begin by examining the fuse box for a 12V+ terminal suitable for tapping into as a constant power source. When conducting a power source check, consider the following:

  1. Utilize a Multimeter: Use a multimeter to identify a suitable power source that remains active even when the ignition is off.
  2. Verify Wiring Diagram: Check the wiring diagram of your vehicle to locate a direct power feed specifically for the cigarette lighter.
  3. Direct Battery Connection: If necessary, connect the cigarette lighter directly to the battery with proper safety precautions to ensure a consistent power supply.

Fuse Inspection Guide

When inspecting the fuse related to the cigarette lighter circuit in your vehicle, start by identifying the fuse responsible for maintaining power to this component. Refer to the fuse diagram in your car's manual or on the fuse box cover to locate the appropriate fuse.

Carefully remove the fuse and check for any signs of damage, such as a broken filament or discoloration. If the fuse is blown, replace it with one of the same amperage rating to restore power to the cigarette lighter.

If the issue persists even after replacing the fuse, consider consulting a professional for further troubleshooting to ensure the problem is addressed correctly.

Wiring Connection Review

Considering a female spade connector for the wiring connection can enhance the reliability of power delivery to the cigarette lighter in your vehicle. When troubleshooting common issues with the cigarette lighter wiring connection, follow these tips:

  1. Utilize an inline fuse: Ensure safety against overloads by incorporating an inline fuse when wiring to the cigarette lighter.
  2. Secure materials for modification: Visit hardware or auto parts stores to gather the necessary materials for a successful wiring connection.
  3. Explore direct battery connection: Connect directly to the battery using alligator clips and extra wire for convenient charging options.

Benefits of Having Cigarette Lighter On

For efficient and convenient device charging, having the cigarette lighter on in your car can be highly advantageous. By keeping the cigarette lighter on, you ensure a continuous power supply to charge essential devices like cellphones and GPS units.

This feature allows you to access power without needing to have the ignition on, providing convenience for charging devices on the go. Whether you're on a long drive or simply need to charge your devices during a quick stop, having the cigarette lighter on while the car is off can be incredibly beneficial.

It ensures that your devices stay charged even when the car is parked, maintaining their functionality whenever you need them. Some users appreciate the convenience of always having power available for their devices without relying on the car's ignition status.

With the use of a USB adapter, the cigarette lighter can become a reliable site for earning power for your electronics, offering a versatile and user-friendly solution for device charging needs.

Frequently Asked Questions

How Do You Keep a Cigarette Lighter off When Your Car Is Off?

To keep a cigarette lighter off when your car is off, disconnect the power source or remove the fuse. Consider wiring modifications to control power flow. Ensure safety by following proper procedures and consulting a professional if needed.

Do Cigarette Lighters Work When Car Is Off?

When the car is off, cigarette lighters do not work as they are powered by the car's electrical systems, typically through the accessory or ignition system. This prevents draining the battery when the vehicle is not running.

Does the 12V Outlet Work When Car Is Off?

When your car is off, the 12V outlet typically stops working to prevent battery drain. It's like a vigilant guard protecting your car's power consumption. Some vehicles may offer an always-on power source for your convenience.

How Do I Get My 12 Volt Outlet to Stay on My Cigarette Lighter?

To keep your 12-volt outlet (cigarette lighter) on when the car is off, ensure a constant power source by connecting directly to the battery or tapping into a 12V constant electrical connection. Follow safety precautions like using an in-line fuse.


In conclusion, keeping the cigarette lighter on when the car is off can be a convenient modification for various reasons. By following the steps outlined and taking necessary safety precautions, you can ensure a successful and functional setup.

Remember, like a well-oiled machine, proper maintenance and care are essential to prevent any issues down the road. So, stay charged up and ready to go with your modified cigarette lighter setup.

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