Alternator wiring question 82 motor into 69 911

[chuckw951]

Hi,

Working on the wiring to install '82 motor (with internal alternator regulator) into '69 911E

There are a number of wires coming out of the alternator housing:
heavy red - to starter
thin red - to ?
blue - to guage
brown 1 - to ground
brown 2 - to ground
brown 3 - to ground



Looking at this previously uploaded schematic, it is unclear to me where the thin red should go, and what is its purpose?

The diagram shows that the thin red goes through T14 14 (14 pin connector) to "III25" What is that?

Is it connected into the ignition so the wire is hot when the key is on to excite the regulator?

Returning to my car, where should I route this thin red wire? Perhaps I can use a relay, so when the key is on this wire is hot?

Thanks for any clues!

Chuck

[addictionMS]

the thin red is always on power, just like the heavy red (really the line that charges the battery when the thing is spinning) the thin red and heavy red are joined at the connection to the alternator.

I think in a 69 you can use it for what ever you like....

Jim

[chuckw951]

Thanks for the reply Jim. This seems to make sense to me now.

Learning to electrical diagrams is a new thing for me!

Chuck