When i first bought the seven the bac had been removed now im finaly trying to put it back on but im not sure which wires to use. I searched and found it is black/white and blue/green. i tried it with the key on the ON position but got nothing also i have two other wires im not to sure what they go to ok picture time hope it helps!

 

The blue/green and black/white wires are what are used to power the BAC. Check voltage at the wires and make sure you get something. Black/white is common ground for the sensors.

The only wire I could find in the manual for black/red would be a wire for the metering oil pump.