Hi Guys, I installed an alternator yesterday in my 55.1st series. I used an alternator from the junkyard and followed the directions in the tech tips here. The alternator I have has a two pronge connector, and a Batt. terminal. I connected the heavy guage (10)wire to the existing wire in the trucks harness that went to the Batt. terminal on the reg. and the lighter guage (12)wire to the 12v supply to the coil. Fired the truck and the all was fine the alt was showing a charge. When I went to turn it off the truck would not shut down. I had to stall the engine. On the next start up it was not showing a charge and when I pull the ground wire it shuts down.I cant measure a charge from the heavy wire form the alternator any more but from the Batt. terminal on the alternator (whic is not connected to anything) it shows 25v. Where did I go wrong.Or is it just a bad part.

Thanks
Tony