From: fizzbintuesday@that-google-mail-domain.com   
      
   Mark Olson wrote:   
   > Tom Del Rosso  wrote:   
   >> The shop will have to start it again, so how long before that damages   
   >> the battery or something?   
   >   
   > Why would they _have_ to start it up?   
      
   I would expect any shop to look and see for themselves before believing   
   the owner.   
      
      
   > I would remove the alternator, and test it on a bench setup   
   > with a known good battery, both without load (except the fully   
   > charged battery) and under some load. No need to start the car and   
   > potentially damage lots of expensive electronics from overvoltage. If   
   > the alternator tests bad, probably the internal regulator needs to   
   > be replaced. If it tests good, I'd look to the wiring in the car,   
   > especially ground straps/braids.   
      
   Is it common for a shop to have a setup that can spin up an alternator?   
      
      
   > I would also question the health of the battery, I'm surprised that   
   > the alternator was able to overdrive it to more than 19V.   
      
   Should I tell them to replace it anyway?   
      
      
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