Here is what I know about alternator wiring: If you get it wrong, then wires fry.. There are some good wiring discussions on this board with diagrams. _____ 1966 912 to 2.7 Frankencar. When I was working on my 911 alternator, I took it there. I set the alternator on his desk, and said Porsche 911 - no hesitation . He took me upstairs.. Porsche 924/944 Electrical Diagrams: How do you read a current flow diagram? It took me a little time to figure it out. Look at it this way. Imagine that you are looking at a diagram that shows waterfalls emptying into a lake. At the bottom of the page (electrical ground), it is similar to a large lake that the waterfalls empty into.
Reading the previous thread on hook ups, and looking at the back of the Alternator straight on, I hooked the Large Red wire to the B+ at the 9:00 position; the brown ground wire to the lug at the 3:00 position: the blue wire from the wiring harness to the lug at the 6:00 position; and the black wire with the spade connector I just taped off.. Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum: Alternator wiring advice User Name: Remember Me? Password: Register:. When I took the old alternator out, there was a wire hanging loose with a female pin end.. Page 970-10 shows a diagram and one terminal is listed D+/61 The factory wiring seems to list Grounds as "G.