Hey all, I am currently experiencing all the same issues with battery dying overnight. I have an 05 V8- Replaced the battery and now alternator, runs at about 13.7 V output. But there is a drain in the battery someplace. Any ideas? I noticed when I changed the alt/gen there was a Bolt coming out of the alt, on the bottom side. is there supposed to be a connection? I have the non faulty cable so thats not an issue, the vw dealer here is lets say, a non help.