The Bafx Products Elm327 Bluetooth Obd2 Scan Tool is a popular choice for vehicle diagnostics due to its compatibility and solid performance. For users looking to optimize its power consumption, especially when leaving it plugged in, modifying it for switched 12V power is a straightforward and beneficial DIY project. This modification ensures the adapter only draws power when the vehicle is on or in accessory mode, preventing battery drain. This guide will walk you through the easy steps to convert your BAFX Products ELM327 Bluetooth OBD2 scan tool to switched power in just about 15 minutes.
To begin, you’ll need to access the internal components of your BAFX OBD2 adapter. The housing is secured with four screws located beneath the blue label. Carefully peel off the adhesive label to reveal these screws and remove them.
Once the screws are removed, gently separate the two halves of the unit. Inside, you’ll see a white connector linking the OBDII connector to the PC board. Unplug this white connector to detach the OBDII connector from the internal circuitry. This step allows for easier access to the wiring.
The key to this modification is redirecting the power source. Locate pin 16, which provides constant 12V power, and pin 8, which is designated for switched ACC 12V power. Carefully move the wire currently connected to pin 16 to pin 8. In most configurations, pin 16 is situated at the top left, and pin 8 is at the bottom left, making this a simple wire relocation.
After moving the wire, reassemble the OBDII connector back into the housing and reconnect the white connector to the PC board. Carefully align the two halves of the housing and secure them back together with the four screws. Be mindful of the internal LEDs during reassembly to avoid bending them. Finally, you can reapply the blue label or leave it off, depending on your preference.
Your BAFX Products ELM327 Bluetooth OBD2 scan tool is now modified for switched 12V power. It will function exactly as before, but will only power on when your vehicle is running or in accessory mode, effectively preventing any unnecessary battery drain when the vehicle is off. This simple modification enhances the usability and longevity of your BAFX OBD2 adapter, making it an even more valuable tool for vehicle diagnostics.
