08 taillight wiring colors - or, installing a trailer wiring harness

[Mustang]

I've got an 08 STi, and am trying to install a wiring harness for my trailer's lights. I can't find an accurate wiring color list/diagram for the 08s anywhere online. I tried tapping into a couple of the wires coming straight out of the taillights just to verify what each one did (with a multimeter), but I wasn't even getting any readings with the multimeter set on 20vdc.

Has anyone installed a wiring harness on an 08 wagon yet? Or, knows the wiring colors for sure?

[Mustang]

OK, finally figured it out. For anyone who uses the 09 Forester hitch and has to splice in the wiring harness that comes with it:
....................Car..........Harness
Ground..........Black..............White
Running..........Blk/Wht...........Brown
Left turn.........Wht/Red..........Yellow
Brake.............Brown.............Thin red
Right turn.......Green***.......Green
Constant 12v....(any)...........Fat red

***Green per the wiring diagram; my right turn wire was more of a grey.