Help with Pioneer DEH-P835R

Pls help with (what I hope) is a basic question. I'm looking for the head unit wiring diagram for a Pioneer DEH-P835R. I've been to the Pioneer website -- the manuals are not in their data base. I've searched this site -- found posts about other DEH units but not hte 835.

I did find a link that says all units since '96 conform to this color coding scheme:  https://www.the12volt.com/request/request2.asp

However, I don't know what year the 835 made its debut. I know the 835 isn't new. 

FYI, my son and i are restoring an '87 Fiero "project car" with the 835 already installed. I used the term "project" because the installer did a real hack job. For example, no rear support -- the weight of the unit has cracked the plastic subframe and sits poorly. Wires from the harness have been cut and lie exposed. There's more atrocities but you get the idea.

Any help appreciated. Cheers.

Thanks, we've now got the basic sound working!

Just in case anyone knows, does this unit have a wire that controls a power antenna and/or dims the head unit light when the car's instrument lights are dimmed?

Cheers.