Mine was charging but my headlights looked like strobe lights. The rectifier was going bad in mine.
When I started mine up Thur morning all was fine for a minute and then the truck stumbled. I thought...wtf! Then the battery warning light would flash in the message center and when I looked at the voltage it was on the first slash at where a 1/4 tank of gas would be. After it ran for about 10 minutes and I floored it it kicked in and started charging. The same thing Fri, Sat and this morning, but this morning it wouldn't even start to charge.