need help with color codes for '90 VW GTI

okie first of all, everyone is welcome here.  You don't have to be experienced or to be an installer.

Okay now the best way to install an aftermarket deck is to use a wiring harness adapter.  Unfortuntely, there are a couple different ones for your vehicle.  What I would suggest doing is going to www.crutchfield.com, then on the left side of the page go to "what fits my car?".  Follow the  directions and when it pops up with "thanks for identifying your vehicle", go to the left side and click on "installation".  then go to "receiver wiring harnesses".  Whatever it comes up with will be the proper adapter to use for your vehicle.  Of course you might want to verify that the plugs match up with the ones you see in your vehicle first (hopefully you didn't cut the plugs!!!!).

If you don't want to get the harness from crutchfield, but somewhere else, you'll just need the last 6 digits of the product number.  These will be 70xxxx and correspond to the Metra (company that makes the harnesses) product number 70-xxxx.

oh yea and you'll probably also need an antenna adapter.  If you do, it'll say so on the first page that you get after entering your vehicle information in crutchfield.  should be under "antenna cable adapters"