Need Help Insalling Stereo On 2004 Sentra

Bouth an installation harness for easy instalation. but.

after i have connected all the following. I still can't get the stereo to turn on.

-12 volt ignition/switched
-rigt frnt spkr both wires
-left frnt spkr both wires
-Chasis Ground
-12 volt battery/constant

I have 3 wires left in the harness. 1 says not used.
the other two are.

-illumination/dimmer
-power antenna

I have 1 wire left i the head unit.

-remonte

what should I connect where?
should I connect the power antenna to the black (ground) wire? I read somwhere that this car uses the power antenna as ground, is this true?
This will be my last try after that I'm taking it to an installation shop. I need the stereo to work today I'm making a 6 hr trip and am desperate. I know I'll go crazy without having music to listen to.

the ones left have NO bearing on the stereo turning on ...... check all the fuses under the dash, in the engine compartment nd the ones built into the stereo power wire. Do NOT connect the ground wire from the stereo to some "black wire" on the harness, use the metal spade that came on the end of it to attach it to a piece of metal behind the dash.