Wiring woes

[masterlock]

So I just got my new Dakota digital dash for my 77 chevy. I was all excited and took it out to wire it up. So I go through the harness in the truck and start cutting wires off got all the major ones off the harness and then im left with a bunch of pink wires and a bunch of black wires, one pink and white, one tan and one tan and white. What are they Im assuming one is my fuel sender and one is my brake warning but which is which. On top of that I cant seem to get the damn dash to come on. Ive got power and a good ground and still nothing. I even tried to wire it direct to the battery and the ground and still it isnt showing that it has power (no blinking LED). Any help would be great fellas.