When i first got into car audio, I joined a big board and started educating myself.  A few yrs later, I could do fiberglass fabrication with motorized formats, all wiring, etc.

It was a great tool, the forum board.

Nowadays, a decade later, there is even more info out there.  The head unit I am using in my new system isn't even here yet but I have copies online of installation manuals, owner's manuals, tips and precautions specifically for an 05 4 runner and this particular head unit, all kinds of great stuff.

I even found some video tutorials on how to operate the unit with actual owners giving tips.

Awesome

http://www.youtube.com/watch?v=bXhJJ43lu10&feature=related

 If I can remember to use it :-[! Whenever I try to find info about a subject, it is like opening the floodgates! It's GREAT! There is something to be said for libraries, encyclopedias and other research tools. Sometimes, it seemed like what you were looking for , just wasn't there . Not a problem with the NET...

                                     As Ever,

                                      skillet