Start by splicing the gray wire [pin 108], this goes to the 12V accessory power on the digital box, the ground [pin 115] to the ground port. I no longer have front wheel speed sensors so I used the left rear speed sensor for this: so on my car it goes Light green wire [pin 20] to the "Sensor ground" on the box and Purple wire [pin 4] to the "Signal in".
Now to setup the box: while holding the SET switch turn the key on, it'll first display the current version of the box, let it go and it will display "OUT", push the SET switch again and it will display the output mode (H-H, H-L, etc), you need L-L, once you get to it hit the SET again, then CAL will show up, hit SET and for my car with 18" wheels the setting ended up being 0.425, the next option will be "ln" you need to click SET and change the "519" to "Lo", that way it will read speeds under 20mph.
Once you set it up, turn the key off, and back on, that will save everything and all settings. Once the car is moving and the red light blinks on the top left corner you can adjust the calibration with the + - buttons.
And off you go! Excuse the lack of bezel there was a lot of troubleshooting involved!
