Whoa! Stop right there.

You are going to need a couple of years of learning before you even think of taking on a project of this magnatude.

Start here: http://auto.howstuffworks.com/

After that go out to a used book store and grab a few manuals on general automotive repair, some on bodywork and some on general automotive electronics (some comprehensive stereo install books cover electricals in depth).

After you have studied those and get a good idea of what you are doing to what and how what you are doing affects other things. THEN see if you can get a book that is specific to your car and start reading it.

Abe