!st is the turn signal switch connector, 2nd is the turn signal stalk mounted wiper switch connector, 3rd is the front to rear body harness with a piggy back connrctor for interior lights. As for the colors, thar's a lot of wires to list. This is where having a copy of having a copy of the electrical service manual or CSM depending of what year you need to work with. Some years have everything in one book, some have seperate books, earlier years have an out right wire diagram book.