Great, thanks very much for the info! I had figured it out by looking at other posts and figuring out the colours, but your post has just confirmed what I thought was the case.
Grey/Red stripe on the ASWC goes to pin 3 on the Metra harness, which connects to the Violet/White wire on the car.
White/Green stripe on the ASWC goes to ground.
Pin 9 on the harness goes to ground, which connects to Orange/White on the car.
Can't believe there is info for the 20-pin out there but none for the 14-pin. Guess it's pretty straight forward once you realise how it all works.
I cross referenced the colours with these instructions for 8-pin and 20-pin (but ignore the pin numbers) to figure it out.
http://contentdocs.installernet.com/doc ... /10988.pdf
http://ae64.com/aswc-install.htm (Variation "A")
These posts from SVXdc also helped:
viewtopic.php?f=22&t=16940&p=233328&hilit=aswc&sid=f05ac1b826842842606ab140602ec882#p233328
viewtopic.php?f=22&t=16264&start=45