If the colors don't match up the description should.
To minimize downtime of your vehicle, install in this order:
Solder ROEM-NIS2 to X920BT wiring harness. You can do this entirely outside of the car.
Connect the power and ground wires for the PAC SWI-PS to headunit's power and grounds. Solder the proper resistors to the white wire on the PAC SWI-PS and some short bits from the red/green wires on it to the other ends:
With this much done, you're ready to start taking your old radio out.
Once it's out, you'll just plug the ROEM-NIS2 into the factory harness, ground the grounds and steering wheel reference wire, connect the two steering wheel interface wires that aren't power and connect the VSS wire, which is on the same harness as the steering wheel interface wires are on.
Fish the microphone wire from the hole in the removed a-pillar cover:
Run the iPod harness to the glovebox:
Attach the GPS antenna with some good mounting tape to the metal bar:
- If you've had it for two months, then there's even
up on my sticky'd post that wasn't there before.
Tuck as much of the wires as you can down the sides:
... and put it back together!
Don't forget I'm on here like 16 hrs/day if you have questions, good luck with it... if you get really, desperate, and can bring a webcam out to the car, I can help you that way too, but it'd be your morning, as I'm halfway around the planet right now