Help, Alternator Hook up for the /6, I thought I had it right! - ZAP, ZAP.. Options

[DougC]

I have a problem where I get a major spark when attaching the battery cables to the battery. Clay Perrine pointed out to me that it's the heavy RED wire that's attached to the Starter (same place as the battery cable) and runs up to the back of the alternator. Clay suggested that this red wire was hooked to the wrong post on the altenator. OK, I removed the complete CIS injection unit and peeled back the engine shoud. The wires were hooked up to the alternator like in Wayne Dempsy's book, the pictures I took upon disassembly were lost so I had to use the book for this. I'm using a newly rebuilt Marchall alt. with external regulator. Here's a breakdown of how I have it wired:

(posts are clockwise from the top)
"+G1" or "+61" = blue wire
"B+" = Red wires [one thick, one thinner]
"another B+" = short ground strap from engine case
"DF" = black wire with spade end
"D-" = 3 small brown wires
"D." = un-used

Where have I gone wrong?

Doug C

[Porsche Rescue]

We know the large red wire from B+ goes to the starter. I agree that the second red also attaches to B+ (different from mine because I have a Bosch alt.) since they are on the same ring. It will be a hot wire when the alt. is running. I am guessing it fed something other than the regulator in its original 911 life. If so, you wouldn't need it and I would tape it off.
Do you also have a D+ terminal on the alternator? That is the red wire in my pic which goes to the relay board, then through the regulator to the blue wire, and then to the "G" lite on the dash.