need help installing CD player on 99 grand am

i diconnected my stock radio easily and i got the dash kit hooked up and i got the wiring harness and the antenna adapter and i bought a kenwood head unit. I tried hooking it up but nothing happened i think i have the wires messed up, if someone can help me that would be great i dont want to pay some1 money to install it for me

make sure all the wires are on the matching colors. might want to test your ground and power wires from the car, not the cd player.
let me know what happens.....