[retireduper]

My 80 911 SC has developed a short which is draining the battery in a few hours. I pulled the negative battery cable off and measured the voltage between the cable and the negative battery terminal and got 12.47V. I then measured the current draw between the terminal and the cable and got 17 A. I pulled the (3) red wires from the + battery terminal and measured the current, and it was about .25 A. I suspect either the starter or alternator, but it is difficult to trouble shoot any further without tearing the alternator out. The car stated and ran pretty good this last weekend, as I put about 70 miles on it. I never stopped for very long so didn't notice any problem with starting, or running. When returning I parked outside my garage and left it for about 3-4 hours. When I returned the battery was dead. Does anyone have any further checks I could make .

Thanks
Chuck