911SC A/C relay wiring diagram help!

[bergfurher]

I need a little help with the wiring diagram for a 911SC to 911 Carrera. The A/C relay in the smuggler's box has a yellow wire on it. I sold my factory workshop manuals years ago and now need them back! I just cannot figure out where the small Yellow wire goes to or comes from.

[gerakroo]

The small yellow wires comes from 85 (relay) and connects to the starter wire (50) from the tunnel harness.

[bergfurher]

Thanks, so energized from the starter.

[timmy2]

Actually used as a ground path for the relay coil when starter solenoid isn't picked up. That way compressor doesn't run on start up.
One of Porsche's unique wiring choices...