Re: Wiring Problem
When my radio was stolen out of my 89 Crown Victoria, I just hard-wired a new harness. I traced and removed all the stock wiring and ran my own. 16-18ga speaker wire to each speaker (which were also conveniently replaced at the time), 22ga for the rest. You need a wire running to your ignition switch, one running to your battery, and a ground. I ran 16ga for my ground, but I'm obsessed with making sure things ground properly. If you have a power antenna, there may be a wire for that, too. If not, use the one labelled as the power antenna for your remote, which is what sends your amplifier (if you've installed a stereo) the signal to turn on/off.
Make sense? This way, you also know that all your wires are fresh. I did the same thing in my Jeep.