OK, this is pissing me off - for my car I CANT get an OEM spec replacement new or second hand, I've seen one in Japan for sale but they are trying to utterly rook me for postage and would cost nearly 800 for a second-hand unit in unknown condition. All wiring is stock, on a 40,000 mile car. first time revving the car past 3k the lights dimmed, then I revved it again and smoke started pouring out the bonnet and it blew a heap of fuses inside. It was the Alternator. I've had mine fully refurbed at a cost of 350, every component was replaced. I put in a new battery before testing. Turned on - no increase in Batt Voltage Gave it a little rev with the volt meter attached and it blew up in my face. Luckily im okay but was a bit hairy. Belt is not overtightened; I cant find any faults or shorts. I'm going to send the Alternator back, but what should I be looking for here guys, because my brain tells me it's more likely there's a background problem that the previous owner was aware of than 2 alternators being faulty. The only thing I can see visually is in the fuse box there's a connector (im not sure where it goes to) and the plastic insulation is a bit melted so guessing some heat went through here; I wont be able to get a replacement connector either.