[submerge]

I pulled my fan and housing to replace it with a restored unit today and after I finished instillation when I reconnected the negative lead to the battery there was a fairly significant spark and all the electric went out. The leads also got warm, the battery was connected for about 1 minute before I pulled the negative off. I pulled the fan, removed alternator, bench tested the ohms and it was -.2 or .2 (i think that tells me the diodes or internal fuse is still good?) reinstalled, double checked all the connections and then checked again. Everything is connected correctly, exactly as it was. There are no blown fuses, nothing is melted, nothing smells burnt, the terminals on the battery are clean.

After I re-installed I still get the spark. I have an open circuit I guess? I would assume it has to do with removing and re-installation of the alternator, but it is exactly the same.

1977 911S - stock 2.7 - rebuild about 1500 miles ago - new wiring harness and alternator at that time.

How do i chase this down? Remove all the fuses one by one and connect the battery until the spark stops? Is there even a fuse to the alternator?

appreciate any thoughts!

thanks