Mechanic removed the alternator and tested it then reported that it was in perfect working condition. Then requested permission to test the regulator. (this vehicle has the regulator separate from the alternator). Permission was granted. After he reported it was working properly he then said there must be something wrong with the alternator. (which he had previously tested and said was working fine. However, he now reported that he couldn't run a complete test on it and failed to inform me of this before telling me that it must be the regulator). End result - 6 hours of labor (2 hrs to remove and 2 hrs to add the altenator. AutoMD estimated 1 hr total), almost $600.00 and the mechanic had no idea on why the battery wouldn't charge. Unhappily I paid the $600 and took the vehicle elsewhere. As an added bonus :-( The mechanic didn't even put the engine cover on properly in the van, leaving a 2 inch gap which let the hot air into the passenger compartment. This is a 2 min job that he was either too lazy or imcompentant to perform. I'm leaning towards the latter since he wasn't able to diagnose a basic charging problem. I also found that the alternator belt was so lose that it nearly came off during the drive home.