I came across this forum while searching for an answer to a problem I have been having. I have a silver 06 with the 4.7. My battery light came on the other day on the way to work. I drove it to work and then back and it died as I pulled in the driveway. I assumed it was the alternator as the plastic cover on the wire to the battery had melted off. I replaced it (with rebuilt from advances) and couldn't get the battery to hold a charge so took it in and had it tested. Was told it was bad, so I bought a battery. Put the battery in started it and my battery light came on. I took it back to advanced and they told me the alternator that I just bought was bad. I traded it in for another and put it in. Still not charging the battery. Had it tested and told it was bad. I took it back and had them order a new one. I put it in and still can't get it to charge the battery. I tested the battery and it's good. I have voltage (11 volts) across the two exciter wires in the plug in the back. What else could be wrong? I checked fuses and don't see anything.