what I got from searching around is that it has to do with keeping the battery voltage up. It says on tamhamburg.net that if the battery falls below 12v the tunes don't take and such. headlights take a lot of juice to runim wondering why we have to unplug the fuse for the headlights when using tuneECU. is it to prevent the battery from draining while we mess around on the laptop? or does the battery need the extra charge to use tuneECU?
what if we just unplug the headlights? that seems a lot easier..