I read somehwhere online that they were going to install a ground wire back to the alternator to prevent high emf readings in the car. I also read that it would be on all large platform cars like the S80, and the Suv. I wonder if they meant the v70 also. Could someone look at there 2004 or newer battery and see if the black wire it tied to the frame or has a separate wire that is going back to the front of the car with the Red positive wire. Supposedly by putting the two wires together, you cancel out much of the Emf. Thanks in advance......Jeffrey