Using this OBD2 Breakout Board is easy. First, if you're doing desktop OBD2 development, connect an external 12V power adapter. Or, if you're using an OBD2 extension cable, the power will come from the vehicle. The green LED will light up when the power is on. To adjust the signal routing, you can install a jumper wire between rows for 'through' connections or change to other pins. You can use the power jumpers to manage the power to each output. When it comes to maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you have any issues, refer to the product overview and GitHub documentation for more help.