One major problem.... Ford is kinda screwy here. The wires that come out of the back of your factory deck are not speaker level wires. They route to the factory amp that is either mounted in the dash or in the trunk. They are kind of the equivilent of rca, or line level, but a little lesser quality. If you hook these up to your speaker level inputs on your amp it will work but sound pretty crappy. So, two options, find the speaker leads of the factory amp and run them to the speaker level inputs, which these will be a little hot for your amp. You will really need to turn the gains down on you amp to maintain sound quality. Or, hard wire in rca cables to the line level outputs on the back of the deck. This way you are almost getting the sound quality of rca's. Neither way is very easy to do. If done incorrectly can really F up your factory stereo.