The BAFX Products PIC18F2480 Bluetooth OBD2 adapter is a highly regarded and compatible device, favored by many for its reliable performance as an ELM327 Bluetooth OBD2 CAN V1.5 scan tool. Users frequently praise its consistent connection and effectiveness with various OBD2 applications. For those looking to optimize its power usage, modifying it for switched 12V power is a popular and straightforward enhancement. This modification ensures that the adapter only draws power when the vehicle is running or in accessory mode, preventing unnecessary battery drain. This guide provides a simple, 15-minute process to convert your BAFX ELM327 Bluetooth OBD2 scan tool to switched 12V power.
Having your BAFX ELM327 Bluetooth OBD2 adapter powered only when your vehicle’s ignition is on offers a significant advantage: it eliminates the risk of battery drain. Standard OBD2 adapters draw power continuously as long as they are plugged into the OBDII port. For users who prefer to leave their scan tool connected, especially when using apps that monitor vehicle data in real-time, this constant power draw can be a concern. By performing this simple modification, you ensure that your BAFX ELM327 Bluetooth OBD2 CAN V1.5 scan tool is only active when you need it, preserving your vehicle’s battery life.
Here’s how to easily modify your BAFX ELM327 Bluetooth OBD2 adapter for switched 12V power:
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Access the Screws: Begin by locating the four screws that secure the adapter’s casing. These screws are concealed beneath the blue adhesive label on the device. Carefully peel off the label to expose the screws.
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Open the Casing: Using a small Phillips head screwdriver, remove the four screws you just uncovered. Once the screws are removed, gently separate the two halves of the adapter’s casing to open it.
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Disconnect the Connector: Inside the opened casing, you will see a white connector linking the OBDII port to the internal circuit board. Carefully unplug this white connector from the PC board.
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Remove the OBDII Connector: With the white connector unplugged, you can now lift the OBDII connector assembly completely out of the adapter’s shell. This provides easy access to the pins.
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Relocate the Pin 16 Wire: Identify pin 16 and pin 8 on the OBDII connector. Pin 16, which carries full-time 12V power, is typically located at the top left when viewing the connector as shown in the image. Pin 8, which is designed for switched ACC 12V power, is located on the bottom left. Carefully move the wire currently inserted into pin 16 and insert it into pin 8. This simple wire relocation is the core of the modification.
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Reassemble the Adapter: Place the OBDII connector assembly back into the adapter’s shell. Reconnect the white connector to the PC board, ensuring it is firmly seated. Carefully close the two halves of the casing and secure them together using the four screws you removed earlier. Be mindful of the five LEDs inside the unit during reassembly to avoid bending them.
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Reapply the Label (Optional): You can choose to reapply the blue adhesive label to cover the screws again, or leave it off based on your preference.
Your BAFX ELM327 Bluetooth OBD2 CAN V1.5 scan tool is now modified for switched 12V power. It will function identically to its original operation, but will now only power on when your vehicle is turned on or in accessory mode. This modification effectively prevents battery drain and enhances the overall user experience, especially for users who frequently use their OBD2 adapter. Enjoy the improved power management of your modified BAFX adapter with your preferred OBDII applications.
